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At least 163 records · Page 9
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Eu3Pd2 by Materials Project

Eu3Pd2 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are three inequivalent Eu sites. In the first Eu site, Eu is bonded in an octahedral geometry to six equivalent Pd atoms. All Eu–Pd bond lengths are 3.17 Å. In the second Eu site, Eu is bonded in a 6-coordinate geometry to six equivalent Pd atoms. There are three shorter (3.05 Å) and three longer (3.22 Å) Eu–Pd bond lengths. In the third Eu site, Eu is bonded in a 5-coordinate geometry to five equivalent Pd atoms. There are a spread of Eu–Pd bond distances ranging from 3.08–3.58 Å. Pd is bonded in a 9-coordinate geometry to eight Eu and one Pd atom. The Pd–Pd bond length is 2.95 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y3Pd2 by Materials Project

Y3Pd2 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are three inequivalent Y sites. In the first Y site, Y is bonded in an octahedral geometry to six equivalent Pd atoms. All Y–Pd bond lengths are 3.01 Å. In the second Y site, Y is bonded in a 6-coordinate geometry to six equivalent Pd atoms. There are three shorter (2.90 Å) and three longer (3.10 Å) Y–Pd bond lengths. In the third Y site, Y is bonded in a 5-coordinate geometry to five equivalent Pd atoms. There are a spread of Y–Pd bond distances ranging from 2.91–3.33 Å. Pd is bonded in a 9-coordinate geometry to eight Y and one Pd atom. The Pd–Pd bond length is 2.88 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2021

Rapid Atomic Ordering Transformation toward Intermetallic Nanoparticles

Chemically ordered intermetallic nanoparticles are promising candidates for energy-related applications such as electrocatalysis. However, the synthesis of intermetallics generally requires long annealing (several hours) to achieve the ordered structure, which causes nanoparticles agglomeration and diminished performance, particularly for catalysis. Herein, we demonstrate a new rapid Joule heating approach that can synthesize highly ordered and well-dispersed intermetallic nanoparticles. As a proof-of-concept, we synthesized fully ordered Pd 3 Pb intermetallic nanoparticles that feature small size distribution (~6 nm). Computational analysis of the L1 2 Pd 3 Pb material suggests that this rapid atomic ordering transformation can be attributed to a vacancy-mediated diffusion mechanism. Moreover, the nanoparticles demonstrate excellent electrocatalytic activity and exceptional stability for the oxygen reduction reaction (ORR), retaining >95% of the current density over 10 h of chronoamperometry test with negligible structural and compositional changes. Furthermore, this study demonstrates a new strategy of providing a new direction for intermetallic synthesis and catalyst discovery.

25 ENERGY STORAGE↗
DOE OSTI2022

Surmounting the interband threshold limit by the hot electron excitation of multi-metallic plasmonic AgAuCu NPs for UV photodetector application

We report multi-metallic alloy NPs composed of various elemental compositions can surmount the interband threshold limit of mono-metallic NPs and thus can offer a promising route to boost up the performance limit of conventional ultraviolet photodetectors (PDs). In this work, a hybrid UV-PD configuration has been demonstrated by combining the multi-metallic plasmonic alloy NPs of AgCu, AuCu, and AgAuCu on a GaN photoactive layer in order to exploit the improved photo carrier injection by the strong hot electrons and LSPR. Among various devices, the tri-metallic AgAuCu NP PD demonstrates the highest performance with a remarkably high photocurrent of 1.47 x 10 -2 A at 1 V with fast rise (T r ) and fall (T f ) times of 170 and 700 ms with a very stable current. This leads to the superior figure-of-merit parameters of the PD with a photoresponsivity of 4.3 x 10 6 mA W-1, detectivity of 3.52 x 10 12 Jones and EQE of 1.39 x 10 6 %, which is ~16 times higher than the bare GaN PD. This ranks the AgAuCu PD as one of the best GaN based UV photodetectors. The photocurrent enhancement and excellent figure-of-merit can be attributed to the significantly increased photo carrier injection by the efficient hot electron generation via the LSPR and improved interfacial barrier characteristics by the tri-metallic elemental synergy.

36 MATERIALS SCIENCE↗
DOE OSTI2021

Influence of Hydrogen Isotopes on Vacancy Formation and Antisite Defect Diffusion in Palladium and Vanadium Metals

Density functional theory calculations are performed to study the interaction between hydrogen isotopes, vacancy, and antisite defects in Pd and V. Various defect configurations and defect-defect distances are systematically explored. Binding energies and migration energy barriers are calculated and tabulated. The study provides atomistic data for subsequent mesoscale simulations of tritium, vacancy, and antisite diffusion. In Pd, a strong binding is found between a vacancy and tritium (0.16 eV). This tritium binding increases the thermal concentration of vacancies by a factor of ~10 at 500 ?C. The increase in vacancy concentration enhances V antisite diffusion in Pd by a factor of ~6 at 500 ?C. The influence of tritium is even stronger in V, with a tritium and vacancy binding energy of 0.38 eV. Such a strong binding increases the thermal concentration of vacancies by a factor of ~300 at 500 ?C. The increase in vacancy concentration enhances Pd antisite diffusion in V by a factor of ~640 at 500 ?C. Vanadium and Pd exhibit a strong driving force to intermix with a formation energy of -1.57 eV for V antisite in Pd and -1.05 eV for Pd antisite in V. The results suggest vanadium diffusion into Pd is energetically stronger than the reverse. Zero-point-energy corrections are taken into account and calculations for hydrogen and tritium are presented.

Setyawan, Wahyu↗
DOE OSTI2020

Materials Data on In4Pd17Se4 by Materials Project

Pd17In4Se4 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. there are five inequivalent Pd sites. In the first Pd site, Pd is bonded in a 1-coordinate geometry to one Pd, three equivalent In, and one Se atom. The Pd–Pd bond length is 2.92 Å. There are two shorter (2.85 Å) and one longer (2.96 Å) Pd–In bond lengths. The Pd–Se bond length is 2.46 Å. In the second Pd site, Pd is bonded in a 4-coordinate geometry to two equivalent Pd, two equivalent In, and two equivalent Se atoms. Both Pd–Pd bond lengths are 2.85 Å. Both Pd–In bond lengths are 2.85 Å. Both Pd–Se bond lengths are 2.56 Å. In the third Pd site, Pd is bonded in a 5-coordinate geometry to one Pd, two equivalent In, and three equivalent Se atoms. The Pd–Pd bond length is 2.92 Å. Both Pd–In bond lengths are 2.90 Å. There are one shorter (2.61 Å) and two longer (2.78 Å) Pd–Se bond lengths. In the fourth Pd site, Pd is bonded to eight Pd and four equivalent In atoms to form distorted PdIn4Pd8 cuboctahedra that share a cornercorner with one InPd12 cuboctahedra, corners with two equivalent PdIn4Pd8 cuboctahedra, edges with four equivalent PdIn4Pd8 cuboctahedra, edges with four equivalent InPd12 cuboctahedra, faces with four equivalent InPd12 cuboctahedra, and faces with seven PdIn4Pd8 cuboctahedra. All Pd–Pd bond lengths are 2.85 Å. There are two shorter (2.86 Å) and two longer (2.89 Å) Pd–In bond lengths. In the fifth Pd site, Pd is bonded to eight equivalent Pd and four equivalent In atoms to form PdIn4Pd8 cuboctahedra that share edges with eight equivalent InPd12 cuboctahedra, faces with four equivalent InPd12 cuboctahedra, and faces with ten PdIn4Pd8 cuboctahedra. All Pd–In bond lengths are 2.90 Å. In is bonded to twelve Pd atoms to form InPd12 cuboctahedra that share a cornercorner with one PdIn4Pd8 cuboctahedra, corners with five equivalent InPd12 cuboctahedra, edges with two equivalent InPd12 cuboctahedra, edges with six PdIn4Pd8 cuboctahedra, faces with four equivalent InPd12 cuboctahedra, and faces with five PdIn4Pd8 cuboctahedra. Se is bonded in a 6-coordinate geometry to six Pd atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sn2PdAu by Materials Project

PdAuSn2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Pd is bonded in a body-centered cubic geometry to two equivalent Au and six equivalent Sn atoms. Both Pd–Au bond lengths are 2.84 Å. All Pd–Sn bond lengths are 2.81 Å. Au is bonded in a distorted body-centered cubic geometry to two equivalent Pd and six equivalent Sn atoms. All Au–Sn bond lengths are 2.87 Å. Sn is bonded in a 6-coordinate geometry to three equivalent Pd and three equivalent Au atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce2In5Pd4 by Materials Project

Ce2Pd4In5 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are two inequivalent Ce sites. In the first Ce site, Ce is bonded in a 4-coordinate geometry to six Pd atoms. There are a spread of Ce–Pd bond distances ranging from 2.92–3.31 Å. In the second Ce site, Ce is bonded in a 4-coordinate geometry to four Pd and ten In atoms. There are two shorter (3.25 Å) and two longer (3.28 Å) Ce–Pd bond lengths. There are a spread of Ce–In bond distances ranging from 3.37–3.49 Å. There are four inequivalent Pd sites. In the first Pd site, Pd is bonded in a 9-coordinate geometry to three Ce and six In atoms. There are a spread of Pd–In bond distances ranging from 2.77–2.89 Å. In the second Pd site, Pd is bonded in a body-centered cubic geometry to one Ce and seven In atoms. There are a spread of Pd–In bond distances ranging from 2.80–2.90 Å. In the third Pd site, Pd is bonded in a 9-coordinate geometry to three Ce and six In atoms. There are a spread of Pd–In bond distances ranging from 2.74–2.97 Å. In the fourth Pd site, Pd is bonded in a distorted body-centered cubic geometry to three equivalent Ce and five In atoms. There are a spread of Pd–In bond distances ranging from 2.80–2.90 Å. There are five inequivalent In sites. In the first In site, In is bonded in a 6-coordinate geometry to one Ce and six Pd atoms. In the second In site, In is bonded in a 8-coordinate geometry to two equivalent Ce and six Pd atoms. In the third In site, In is bonded in a 3-coordinate geometry to three equivalent Ce and three equivalent Pd atoms. In the fourth In site, In is bonded in a 6-coordinate geometry to one Ce and six Pd atoms. In the fifth In site, In is bonded in a 3-coordinate geometry to three equivalent Ce and three equivalent Pd atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pr4CdPd by Materials Project

Pr4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Pr sites. In the first Pr site, Pr is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Pr–Pd bond lengths are 2.97 Å. All Pr–Cd bond lengths are 3.57 Å. In the second Pr site, Pr is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Pr–Pd bond lengths are 2.98 Å. Both Pr–Cd bond lengths are 3.63 Å. In the third Pr site, Pr is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Pr–Pd bond lengths are 3.68 Å. Both Pr–Cd bond lengths are 3.46 Å. Pd is bonded in a 6-coordinate geometry to nine Pr atoms. Cd is bonded to nine Pr and three equivalent Cd atoms to form a mixture of distorted corner and face-sharing CdPr9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.21 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tm4CdPd by Materials Project

Tm4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Tm sites. In the first Tm site, Tm is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Tm–Pd bond lengths are 2.84 Å. All Tm–Cd bond lengths are 3.31 Å. In the second Tm site, Tm is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Tm–Pd bond lengths are 2.83 Å. Both Tm–Cd bond lengths are 3.47 Å. In the third Tm site, Tm is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Tm–Pd bond lengths are 3.49 Å. Both Tm–Cd bond lengths are 3.20 Å. Pd is bonded in a 6-coordinate geometry to nine Tm atoms. Cd is bonded to nine Tm and three equivalent Cd atoms to form a mixture of distorted corner and face-sharing CdTm9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.18 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb4CdPd by Materials Project

Tb4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Tb sites. In the first Tb site, Tb is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Tb–Pd bond lengths are 2.89 Å. All Tb–Cd bond lengths are 3.40 Å. In the second Tb site, Tb is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Tb–Pd bond lengths are 2.88 Å. Both Tb–Cd bond lengths are 3.54 Å. In the third Tb site, Tb is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Tb–Pd bond lengths are 3.57 Å. Both Tb–Cd bond lengths are 3.29 Å. Pd is bonded in a 6-coordinate geometry to nine Tb atoms. Cd is bonded to nine Tb and three equivalent Cd atoms to form a mixture of distorted face and corner-sharing CdTb9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.20 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y4CdPd by Materials Project

Y4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Y sites. In the first Y site, Y is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Y–Pd bond lengths are 2.89 Å. All Y–Cd bond lengths are 3.39 Å. In the second Y site, Y is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Y–Pd bond lengths are 2.88 Å. Both Y–Cd bond lengths are 3.54 Å. In the third Y site, Y is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Y–Pd bond lengths are 3.57 Å. Both Y–Cd bond lengths are 3.29 Å. Pd is bonded in a 6-coordinate geometry to nine Y atoms. Cd is bonded to nine Y and three equivalent Cd atoms to form a mixture of distorted face and corner-sharing CdY9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.20 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La4CdPd by Materials Project

La4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent La sites. In the first La site, La is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All La–Pd bond lengths are 3.00 Å. All La–Cd bond lengths are 3.63 Å. In the second La site, La is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both La–Pd bond lengths are 3.00 Å. Both La–Cd bond lengths are 3.68 Å. In the third La site, La is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both La–Pd bond lengths are 3.71 Å. Both La–Cd bond lengths are 3.48 Å. Pd is bonded in a 6-coordinate geometry to nine La atoms. Cd is bonded to nine La and three equivalent Cd atoms to form a mixture of distorted face and corner-sharing CdLa9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.29 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho4CdPd by Materials Project

Ho4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Ho sites. In the first Ho site, Ho is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Ho–Pd bond lengths are 2.86 Å. All Ho–Cd bond lengths are 3.38 Å. In the second Ho site, Ho is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Ho–Pd bond lengths are 2.85 Å. Both Ho–Cd bond lengths are 3.51 Å. In the third Ho site, Ho is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Ho–Pd bond lengths are 3.53 Å. Both Ho–Cd bond lengths are 3.25 Å. Pd is bonded in a 6-coordinate geometry to nine Ho atoms. Cd is bonded to nine Ho and three equivalent Cd atoms to form a mixture of distorted face and corner-sharing CdHo9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.17 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Er4CdPd by Materials Project

Er4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Er sites. In the first Er site, Er is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Er–Pd bond lengths are 2.85 Å. All Er–Cd bond lengths are 3.35 Å. In the second Er site, Er is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Er–Pd bond lengths are 2.84 Å. Both Er–Cd bond lengths are 3.49 Å. In the third Er site, Er is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Er–Pd bond lengths are 3.52 Å. Both Er–Cd bond lengths are 3.23 Å. Pd is bonded in a 6-coordinate geometry to nine Er atoms. Cd is bonded to nine Er and three equivalent Cd atoms to form a mixture of distorted face and corner-sharing CdEr9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.16 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy4CdPd by Materials Project

Dy4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Dy sites. In the first Dy site, Dy is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Dy–Pd bond lengths are 2.88 Å. All Dy–Cd bond lengths are 3.37 Å. In the second Dy site, Dy is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Dy–Pd bond lengths are 2.87 Å. Both Dy–Cd bond lengths are 3.53 Å. In the third Dy site, Dy is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Dy–Pd bond lengths are 3.55 Å. Both Dy–Cd bond lengths are 3.26 Å. Pd is bonded in a 6-coordinate geometry to nine Dy atoms. Cd is bonded to nine Dy and three equivalent Cd atoms to form a mixture of distorted corner and face-sharing CdDy9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.19 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd4CdPd by Materials Project

Nd4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Nd sites. In the first Nd site, Nd is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Nd–Pd bond lengths are 2.95 Å. All Nd–Cd bond lengths are 3.54 Å. In the second Nd site, Nd is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Nd–Pd bond lengths are 2.96 Å. Both Nd–Cd bond lengths are 3.61 Å. In the third Nd site, Nd is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Nd–Pd bond lengths are 3.66 Å. Both Nd–Cd bond lengths are 3.41 Å. Pd is bonded in a 6-coordinate geometry to nine Nd atoms. Cd is bonded to nine Nd and three equivalent Cd atoms to form a mixture of distorted corner and face-sharing CdNd9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.22 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Lu4CdPd by Materials Project

Lu4PdCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Lu sites. In the first Lu site, Lu is bonded in a 3-coordinate geometry to three equivalent Pd and three equivalent Cd atoms. All Lu–Pd bond lengths are 2.80 Å. All Lu–Cd bond lengths are 3.29 Å. In the second Lu site, Lu is bonded in a distorted bent 150 degrees geometry to two equivalent Pd and two equivalent Cd atoms. Both Lu–Pd bond lengths are 2.81 Å. Both Lu–Cd bond lengths are 3.45 Å. In the third Lu site, Lu is bonded in a 4-coordinate geometry to two equivalent Pd and two equivalent Cd atoms. Both Lu–Pd bond lengths are 3.46 Å. Both Lu–Cd bond lengths are 3.18 Å. Pd is bonded in a 6-coordinate geometry to nine Lu atoms. Cd is bonded to nine Lu and three equivalent Cd atoms to form a mixture of distorted corner and face-sharing CdLu9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.15 Å.

36 MATERIALS SCIENCE↗