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At least 667 records · Page 37
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on ZnAs2C12(NF)12 by Materials Project

Zn(CN)6(CN)6(AsF6)2 crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of eighteen hydrogen cyanide molecules, six AsF6 clusters, and three Zn(CN)6 clusters. In each AsF6 cluster, As is bonded in an octahedral geometry to six F1- atoms. There is three shorter (1.77 Å) and three longer (1.78 Å) As–F bond length. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one As atom. In the second F1- site, F1- is bonded in a single-bond geometry to one As atom. In each Zn(CN)6 cluster, Zn2+ is bonded in an octahedral geometry to six equivalent N3- atoms. All Zn–N bond lengths are 2.15 Å. C+3.83+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.16 Å. N3- is bonded in a linear geometry to one Zn2+ and one C+3.83+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ZnAs2C6S12N12(OF2)6 by Materials Project

ZnC6S12(N2O)6(AsF6)2 crystallizes in the trigonal P-3 space group. The structure is zero-dimensional and consists of two AsF6 clusters and one ZnC6S12(N2O)6 cluster. In each AsF6 cluster, As5+ is bonded in an octahedral geometry to six F1- atoms. All As–F bond lengths are 1.78 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one As5+ atom. In the ZnC6S12(N2O)6 cluster, Zn2+ is bonded in an octahedral geometry to six equivalent O2- atoms. All Zn–O bond lengths are 2.12 Å. C4+ is bonded in a distorted single-bond geometry to one N1+ and one O2- atom. The C–N bond length is 1.35 Å. The C–O bond length is 1.25 Å. There are two inequivalent N1+ sites. In the first N1+ site, N1+ is bonded in a water-like geometry to two S2- atoms. There is one shorter (1.59 Å) and one longer (1.62 Å) N–S bond length. In the second N1+ site, N1+ is bonded in a distorted bent 120 degrees geometry to one C4+ and one S2- atom. The N–S bond length is 1.59 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted water-like geometry to two N1+ atoms. In the second S2- site, S2- is bonded in a 1-coordinate geometry to one N1+ atom. O2- is bonded in a 2-coordinate geometry to one Zn2+ and one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni3Te(MoO7)6 by Materials Project

Te(MoO4)6(NiO6)3 is T-50 Boron-derived structured and crystallizes in the trigonal R-3c space group. The structure is zero-dimensional and consists of eighteen NiO6 clusters and six Te(MoO4)6 clusters. In each NiO6 cluster, Ni is bonded in an octahedral geometry to six O atoms. There are a spread of Ni–O bond distances ranging from 1.81–1.85 Å. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Ni atom. In the second O site, O is bonded in a single-bond geometry to one Ni atom. In the third O site, O is bonded in a single-bond geometry to one Ni atom. In each Te(MoO4)6 cluster, Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.73–2.34 Å. Te is bonded in an octahedral geometry to six equivalent O atoms. All Te–O bond lengths are 1.96 Å. There are four inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Mo atom. In the second O site, O is bonded in a bent 120 degrees geometry to two equivalent Mo atoms. In the third O site, O is bonded in a single-bond geometry to one Mo atom. In the fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mo and one Te atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sb2H10(CF2)3 by Materials Project

C3SbH10SbF6 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of eight C3SbH10 clusters and eight SbF6 clusters. In four of the C3SbH10 clusters, there are three inequivalent C+1.33- sites. In the first C+1.33- site, C+1.33- is bonded in a distorted trigonal non-coplanar geometry to one Sb and three H1+ atoms. The C–Sb bond length is 2.12 Å. There is two shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. In the second C+1.33- site, C+1.33- is bonded in a distorted trigonal non-coplanar geometry to one Sb and three H1+ atoms. The C–Sb bond length is 2.12 Å. There is two shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. In the third C+1.33- site, C+1.33- is bonded in a distorted trigonal non-coplanar geometry to one Sb and three H1+ atoms. The C–Sb bond length is 2.12 Å. There is two shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. Sb is bonded in a tetrahedral geometry to three C+1.33- and one H1+ atom. The Sb–H bond length is 1.69 Å. There are ten inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one Sb atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In four of the C3SbH10 clusters, there are three inequivalent C+1.33- sites. In the first C+1.33- site, C+1.33- is bonded in a distorted trigonal non-coplanar geometry to one Sb and three H1+ atoms. The C–Sb bond length is 2.12 Å. There is two shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. In the second C+1.33- site, C+1.33- is bonded in a distorted trigonal non-coplanar geometry to one Sb and three H1+ atoms. The C–Sb bond length is 2.12 Å. There is two shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. In the third C+1.33- site, C+1.33- is bonded in a distorted trigonal non-coplanar geometry to one Sb and three H1+ atoms. The C–Sb bond length is 2.12 Å. There is two shorter (1.09 Å) and one longer (1.10 Å) C–H bond length. Sb is bonded in a tetrahedral geometry to three C+1.33- and one H1+ atom. The Sb–H bond length is 1.69 Å. There are ten inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one Sb atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one C+1.33- atom. In each SbF6 cluster, Sb is bonded in an octahedral geometry to six F1- atoms. There are a spread of Sb–F bond distances ranging from 1.91–1.94 Å. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Sb atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Sb atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Sb atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one Sb atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one Sb atom. In the sixth F1- site, F1- is bonded in a single-bond geometry to one Sb atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H15PdRuN9O11 by Materials Project

Pd(NO2)4RuN5H13O2H2O crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two water molecules, two Pd(NO2)4 clusters, and two RuN5H13O2 clusters. In one of the Pd(NO2)4 clusters, Pd4+ is bonded in a square co-planar geometry to four N+0.33- atoms. There are two shorter (2.05 Å) and two longer (2.06 Å) Pd–N bond lengths. There are two inequivalent N+0.33- sites. In the first N+0.33- site, N+0.33- is bonded in a trigonal planar geometry to one Pd4+ and two O2- atoms. There is one shorter (1.24 Å) and one longer (1.26 Å) N–O bond length. In the second N+0.33- site, N+0.33- is bonded in a trigonal planar geometry to one Pd4+ and two O2- atoms. Both N–O bond lengths are 1.25 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In the second O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In the third O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In one of the Pd(NO2)4 clusters, Pd4+ is bonded in a square co-planar geometry to four N+0.33- atoms. There are two shorter (2.05 Å) and two longer (2.06 Å) Pd–N bond lengths. There are two inequivalent N+0.33- sites. In the first N+0.33- site, N+0.33- is bonded in a trigonal planar geometry to one Pd4+ and two O2- atoms. Both N–O bond lengths are 1.25 Å. In the second N+0.33- site, N+0.33- is bonded in a trigonal planar geometry to one Pd4+ and two O2- atoms. There is one shorter (1.25 Å) and one longer (1.26 Å) N–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In the second O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In the third O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom. In each RuN5H13O2 cluster, Ru6+ is bonded in an octahedral geometry to five N+0.33- and one O2- atom. There is one shorter (1.75 Å) and four longer (2.13 Å) Ru–N bond length. The Ru–O bond length is 1.99 Å. There are five inequivalent N+0.33- sites. In the first N+0.33- site, N+0.33- is bonded in a linear geometry to one Ru6+ and one O2- atom. The N–O bond length is 1.17 Å. In the second N+0.33- site, N+0.33- is bonded in a trigonal non-coplanar geometry to one Ru6+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. In the third N+0.33- site, N+0.33- is bonded in a distorted trigonal non-coplanar geometry to one Ru6+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. In the fourth N+0.33- site, N+0.33- is bonded in a distorted trigonal non-coplanar geometry to one Ru6+ and three H1+ atoms. There is one shorter (1.02 Å) and two longer (1.03 Å) N–H bond length. In the fifth N+0.33- site, N+0.33- is bonded in a trigonal non-coplanar geometry to one Ru6+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are thirteen inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the twelfth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. In the thirteenth H1+ site, H1+ is bonded in a single-bond geometry to one N+0.33- atom. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Ru6+ and one H1+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one N+0.33- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2023

Structural mapping and tuning of mixed halide ions in amorphous sulfides for fast Li-ion conduction and high deformability

Amorphous sulfides are among the most promising candidates for solid electrolytes (SEs) owing to their excellent deformability and acceptable Li-ion conductivity (σion) at room temperature. However, the complex atomic structure of these amorphous materials without long-range ordering results in a lack of structural understanding and difficulties in tuning material properties. Here, in this study, we performed structural mapping of glassy sulfide SEs composed of various anion clusters using a combinatorial atomic level analysis of synchrotron X-ray-based pair distribution function (PDF) and reverse Monte-Carlo (RMC) methods, demonstrating the potential to tune σ ion in glass SEs. First, we prepared a new glassy sulfide with a mixed anion framework of two halogens (Br and I) as atomic anions, with PS 4 3- molecular anions in a Li 2 S–P 2 S 5 -based glass SE. At a specific Br content, [(Li 2 S) 0.658 (LiI 0.9 LiBr 0.1 ) 0.342 ] 0.825 [P 2 S 5 ] 0.175 recorded a σ ion of 2.27 mS cm -1 , the highest value for any glass sulfides reported to date; however, its elastic modulus was still suppressed to 14.48 GPa. PDF and RMC calculations successfully provided structural mapping of anion clusters, including two halogens. Molecular dynamics simulations of each composition confirmed that flexible coordination caused by the rattling of small polarizable Br ions in the mixed halogens of glassy SEs contributed to the superior σ ion . Our results may provide new insights into the design of superior glassy SEs that play key roles in all-solid-state batteries requiring fast Li-ion conduction and high deformability.

36 MATERIALS SCIENCE↗
DOE OSTI2023

Coupled-cluster theory for strong entanglement in nuclei

Atomic nuclei can exhibit shape coexistence and multireference physics that enters in their ground states, and accurately capturing the ensuing correlations and entanglement is challenging. Here, we address this problem by applying single-reference coupled-cluster theory based on spherical and deformed reference states and the tailored coupled-cluster method. The latter combines configuration interactions to capture static correlations with coupled-cluster theory for dynamic correlations. We compute the atomic nuclei 12 C, 28 Si, and 56 Ni and find that the tailored coupled-cluster method and the single-reference approach based on a deformed Hartree-Fock state yield the most accurate results.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
DOE OSTI2022

Fast emulation of quantum three-body scattering

Here, we develop a class of emulators for solving quantum three-body scattering problems. They are based on combining the variational method for scattering observables and the recently proposed eigenvector continuation concept. The emulators are first trained by the exact scattering solutions of the governing Hamiltonian at a small number of points in its parameter space, and then employed to make interpolations and extrapolations in that space. Through a schematic nuclear-physics model with finite-range two and three-body interactions, we demonstrate the emulators to be extremely accurate and efficient. The computing time for emulation is on the scale of milliseconds (on a laptop), with relative errors ranging from 10 –13 to 10 –4 depending on the case. The emulators also require little memory. We argue that these emulators can be generalized to even more challenging scattering problems. Furthermore, this general strategy may be applicable for building the same type of emulators in other fields, wherever variational methods can be developed for evaluating physical models.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
DOE OSTI2020

Materials Data on Fe6Ge2(CO)23 by Materials Project

(Fe(CO)4)4(Fe(CO)3)2(Ge)2CO crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two formaldehyde molecules, four germanium molecules, four Fe(CO)3 clusters, and eight Fe(CO)4 clusters. In two of the Fe(CO)3 clusters, Fe3+ is bonded in a 3-coordinate geometry to three C+0.87+ atoms. There is two shorter (1.78 Å) and one longer (1.81 Å) Fe–C bond length. There are three inequivalent C+0.87+ sites. In the first C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the second C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the third C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In two of the Fe(CO)3 clusters, Fe3+ is bonded in a 3-coordinate geometry to three C+0.87+ atoms. There is two shorter (1.78 Å) and one longer (1.80 Å) Fe–C bond length. There are three inequivalent C+0.87+ sites. In the first C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the second C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the third C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In four of the Fe(CO)4 clusters, Fe3+ is bonded in a distorted see-saw-like geometry to four C+0.87+ atoms. There are a spread of Fe–C bond distances ranging from 1.77–1.82 Å. There are four inequivalent C+0.87+ sites. In the first C+0.87+ site, C+0.87+ is bonded in a distorted single-bond geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the second C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the third C+0.87+ site, C+0.87+ is bonded in a distorted single-bond geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the fourth C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In four of the Fe(CO)4 clusters, Fe3+ is bonded in a distorted see-saw-like geometry to four C+0.87+ atoms. There are a spread of Fe–C bond distances ranging from 1.77–1.81 Å. There are four inequivalent C+0.87+ sites. In the first C+0.87+ site, C+0.87+ is bonded in a distorted single-bond geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the second C+0.87+ site, C+0.87+ is bonded in a distorted single-bond geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the third C+0.87+ site, C+0.87+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the fourth C+0.87+ site, C+0.87+ is bonded in a linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one C+0.87+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2021

ESI-MS Identification of the Cationic Phosphine-Ligated Gold Clusters Au1-Au22: Insight into the Gold-Ligand Ratio and Abundance of Larger Clusters

Triphenylphosphine (PPh3)-ligated gold clusters offer promising potential applications due to their relative ease of synthesis and usefulness in forming advanced cluster architectures. While previous studies reported cationic PPh3-ligated gold clusters with core sizes of Au1 - Au4, Au6 - Au11, and Au¬13 - Au14, there has not been definitive identification by mass spectrometry of larger clusters in the Au12 - Au25¬ range. Herein, we survey a polydisperse solution of cationic PPh3-ligated gold clusters using high mass-resolution (M/?M = 60,000) electrospray ionization mass spectrometry (ESI-MS). To improve the sensitivity and mass resolution of larger clusters for unambiguous identification, we increased the number of scan averages and reduced the range of mass collection windows to 200 m/z, thereby mitigating potential mass and ion abundance bias resulting from smaller “building block” gold clusters and other solution components present in higher abundance. In addition to the previously reported clusters, we identified several new species including Au5(PPh3)5+, Au12(PPh3)9HCl2+, Au15(PPh3)9Cl2+, Au16(PPh3)10Cl22+, Au17(PPh3)113+, Au18(PPh3)102+, Au19(PPh3)10Cl2+, Au20(PPh3)12H33+, Au21(PPh3)10Cl2+, and Au22(PPh3)10Cl22+, indicating that a full range of clusters between Au1 - Au22 may be observed in a single polydisperse solution. Considering all of the observed clusters, our findings provide evidence that the “magic number” icosahedral Au13 may be the transition point in cluster growth between smaller clusters, exhibiting a 1:1 gold-to-ligand ratio, and larger clusters, wherein subsequent gold atoms are added to the core without an equal number of accompanying ligands. Our method demonstrates that reducing the range of m/z collection windows and increasing the number of scan averages can improve instrument sensitivity for cationic gold clusters and enable a more complete survey of polydisperse solutions, thereby providing new insights to guide and validate the results of other characterization methods and theoretical calculations. This work was supported by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences. MH acknowledges support from the DOE Science Undergraduate Laboratory Internship (SULI) program. HH acknowledges support from the DOE Office of Workforce Development for Teachers and Scientist (WDTS) under the Visiting Faculty Program (VFP). This work was performed using EMSL, a national scientific user facility sponsored by the DOE's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory (PNNL). PNNL is a multiprogram national laboratory operated for DOE by Battelle.

Hewitt, Michael↗
NASA NTRS1989

On the binding energy of He(n)+, for n = 2-7

The atomization energy of small positively charged He clusters has been studied using ab initio methods that include correlation. The atomization energy increases monotonically with cluster size. The inclusion of correlation changes the nature of the bonding and hence changes the structure of the most stable cluster.

Rosi, Marzio↗
DOE OSTI2020

Materials Data on Fe2P3C8N3(ClO2)4 by Materials Project

(Fe(CO)4)2P3N3Cl4 crystallizes in the monoclinic P2_1 space group. The structure is zero-dimensional and consists of eight Fe(CO)4 clusters and four P3N3Cl4 clusters. In four of the Fe(CO)4 clusters, Fe3+ is bonded in a distorted see-saw-like geometry to four C1+ atoms. There are a spread of Fe–C bond distances ranging from 1.78–1.83 Å. There are four inequivalent C1+ sites. In the first C1+ site, C1+ is bonded in a linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the second C1+ site, C1+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the third C1+ site, C1+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the fourth C1+ site, C1+ is bonded in a distorted single-bond geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In four of the Fe(CO)4 clusters, Fe3+ is bonded in a distorted see-saw-like geometry to four C1+ atoms. There are a spread of Fe–C bond distances ranging from 1.78–1.83 Å. There are four inequivalent C1+ sites. In the first C1+ site, C1+ is bonded in a linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the second C1+ site, C1+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the third C1+ site, C1+ is bonded in a distorted linear geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. In the fourth C1+ site, C1+ is bonded in a distorted single-bond geometry to one Fe3+ and one O2- atom. The C–O bond length is 1.16 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one C1+ atom. In each P3N3Cl4 cluster, there are three inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to two N3- and two Cl1- atoms to form corner-sharing PN2Cl2 tetrahedra. There is one shorter (1.58 Å) and one longer (1.60 Å) P–N bond length. There are one shorter (2.02 Å) and one longer (2.03 Å) P–Cl bond lengths. In the second P5+ site, P5+ is bonded to two N3- and two Cl1- atoms to form corner-sharing PN2Cl2 tetrahedra. There is one shorter (1.58 Å) and one longer (1.60 Å) P–N bond length. Both P–Cl bond lengths are 2.03 Å. In the third P5+ site, P5+ is bonded in a bent 120 degrees geometry to two N3- atoms. Both P–N bond lengths are 1.64 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the second N3- site, N3- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the third N3- site, N3- is bonded in a bent 120 degrees geometry to two P5+ atoms. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one P5+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one P5+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one P5+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrH10SO9 by Materials Project

Cr(HO)6CrH10(SO5)2(H2O)2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two water molecules, one Cr(HO)6 cluster, and one CrH10(SO5)2 cluster. In the Cr(HO)6 cluster, Cr2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Cr–O bond distances ranging from 1.70–2.08 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Cr2+ atom. In the second O2- site, O2- is bonded in a water-like geometry to one Cr2+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Cr2+ and two H1+ atoms. In the CrH10(SO5)2 cluster, Cr2+ is bonded in a square co-planar geometry to four O2- atoms. All Cr–O bond lengths are 2.01 Å. There are five inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.48 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. S6+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of S–O bond distances ranging from 1.49–1.69 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr2+ and one S6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Cr2+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one S6+ atom. In the fifth O2- site, O2- is bonded in a water-like geometry to one H1+ and one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AlH6N2Cl3 by Materials Project

AlCl4AlH12(N2Cl)2 crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four AlCl4 clusters and four AlH12(N2Cl)2 clusters. In each AlCl4 cluster, Al3+ is bonded in a tetrahedral geometry to four Cl1- atoms. There are one shorter (2.15 Å) and three longer (2.17 Å) Al–Cl bond lengths. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In each AlH12(N2Cl)2 cluster, Al3+ is bonded in an octahedral geometry to four N3- and two equivalent Cl1- atoms. There are two shorter (2.02 Å) and two longer (2.06 Å) Al–N bond lengths. Both Al–Cl bond lengths are 2.35 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded to one Al3+ and three H1+ atoms to form distorted corner-sharing NAlH3 tetrahedra. There is one shorter (1.02 Å) and two longer (1.03 Å) N–H bond length. In the second N3- site, N3- is bonded to one Al3+ and three H1+ atoms to form distorted corner-sharing NAlH3 tetrahedra. All N–H bond lengths are 1.03 Å. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. Cl1- is bonded in a single-bond geometry to one Al3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CoH20PtC4(NO3)4 by Materials Project

Pt(NH3)4CoH4(C2O5)2(H2O)2 crystallizes in the orthorhombic I222 space group. The structure is zero-dimensional and consists of four water molecules, two CoH4(C2O5)2 clusters, and two Pt(NH3)4 clusters. In each CoH4(C2O5)2 cluster, Co2+ is bonded in an octahedral geometry to six O2- atoms. There are two shorter (2.06 Å) and four longer (2.12 Å) Co–O bond lengths. C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.28 Å) C–O bond length. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one C4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Co2+ and two equivalent H1+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co2+ and one C4+ atom. In each Pt(NH3)4 cluster, Pt2- is bonded in a square co-planar geometry to four equivalent N3- atoms. All Pt–N bond lengths are 2.07 Å. N3- is bonded in a distorted trigonal non-coplanar geometry to one Pt2- and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiH20PtC4(NO3)4 by Materials Project

Pt(NH3)4NiH4(C2O5)2(H2O)2 crystallizes in the orthorhombic I222 space group. The structure is zero-dimensional and consists of four water molecules, two NiH4(C2O5)2 clusters, and two Pt(NH3)4 clusters. In each NiH4(C2O5)2 cluster, Ni2+ is bonded in an octahedral geometry to six O2- atoms. There are four shorter (2.07 Å) and two longer (2.08 Å) Ni–O bond lengths. C4+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.26 Å) and one longer (1.28 Å) C–O bond length. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one C4+ atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Ni2+ and two equivalent H1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Ni2+ and one C4+ atom. In each Pt(NH3)4 cluster, Pt2- is bonded in a square co-planar geometry to four equivalent N3- atoms. All Pt–N bond lengths are 2.06 Å. N3- is bonded in a distorted trigonal non-coplanar geometry to one Pt2- and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Single-Walled Carbon Nanotubes with Confined Chalcogens as the Catalysts and Electrodes for Oxygen Reduction Reaction in Fuel Cells

The goal of this project is to synthesize and characterize a new non-metal electro-catalyst for oxygen reduction reaction (ORR) for fuel cell applications. The intended catalyst is a composite material composed of sulfur chains encapsulated in narrow diameter single-walled carbon nanotubes (S@SWNTs). S@SWNTs were successfully synthesized through sulfur vapor infusion method, and validated with Raman spectroscopy. However, the electrochemical analysis on the ORR catalytic activity of S@SWNTs indicated that it had low ORR catalytic activity. Our theoretical study based on density functional theory (DFT) revealed that the poor oxygen adsorption (low binding energy) on the surface of S@SWNTs was the bottleneck of the entire catalytic reaction. The focus of the project was subsequently pivoted to the development of a new non-noble metal ORR catalyst that could provide durability in acidic electrolyte. The hypothesis was to encapsulate small iron (Fe) clusters in SWNTs (Fe@SWNTs) can provide ORR electro-catalytic activity and long durability in acidic environment. DFT-based computational studies were carried out to explore the feasibility of the Fe@SWNTs catalyst. The theoretical study indicated that Fe@SWNTs indeed could catalyze the ORR with lower theoretical overpotential than platinum (Pt). However, its weaker bonding energy with oxygen was the bottleneck of the overall reaction. On the other hand, Fe clusters (composed of 7 Fe atoms) encapsulated in nitrogen-doped SWNTs (Fe 7 @N 4 WSNTs) showed proper oxygen adsorption by the Fe cluster and low theoretical overpotential of ORR. Comparing to the Fe single atom catalyst on N-doped SWNTs (Fe-N 4 SWNTs), which is one the best non-noble metal ORR catalysts reported in the literature, the Fe 7 @N 4 WSNTs showed lower overpotential and better resistance to acidic environment. Fe encapsulated N-doped SWNTs were synthesized with ferrocene as the Fe precursors through vapor infusion method, and experimental validate is underway. This study theoretically demonstrated the feasibility of a new type of non-noble metal electro-catalyst for ORR that could have high catalytic activity and long durability.

08 HYDROGEN↗
DOE OSTI2020

Materials Data on H6AuBrN2 by Materials Project

AuN2H6Br crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of eight hydrobromic acid molecules and eight AuN2H6 clusters. In four of the AuN2H6 clusters, Au1+ is bonded in a linear geometry to two equivalent N3- atoms. Both Au–N bond lengths are 2.05 Å. N3- is bonded in a trigonal non-coplanar geometry to one Au1+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In four of the AuN2H6 clusters, Au1+ is bonded in a linear geometry to two N3- atoms. There are one shorter (2.04 Å) and one longer (2.05 Å) Au–N bond lengths. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a trigonal non-coplanar geometry to one Au1+ and three H1+ atoms. There is one shorter (1.02 Å) and two longer (1.04 Å) N–H bond length. In the second N3- site, N3- is bonded in a trigonal non-coplanar geometry to one Au1+ and three H1+ atoms. There is one shorter (1.02 Å) and two longer (1.03 Å) N–H bond length. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗