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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 829 records · Page 46
All sourcesNASA NTRSDOE OSTI
DOE OSTI2024

Modeling Diurnal and Annual Ethylene Generation from Solar-Driven Electrochemical CO 2 Reduction Devices

Integrated solar fuels devices for CO 2 reduction (CO 2 R) are a promising technology class towards achieving net-negative carbon emissions. Designing integrated CO 2 R solar fuels devices requires careful co-design of electrochemical and photovoltaic components as well as consideration of the diurnal and seasonal effects of solar irradiance, temperature, and other meteorological factors expected for ‘on-sun’ deployment. Here, using a photovoltaic-electrochemical (PV-EC) platform, we developed a temperature and potential-dependent diurnal and annual model using experimental CO 2 R performance of Cu-based electrocatalysts, local meteorological data from the National Solar Radiation Database (NSRD), and modeled performance of commercial c-Si PVs. We simulated diurnal product outputs with and without the effects of ambient temperature to determine gaseous product temperature sensitivity. From these outputs, we observed seasonal variation in gaseous product generation, with up to two-fold increases in ethylene productivity between the Winter and Summer, analyzed the consequences of dynamic cloud coverage, and identified periods where device cooling/heating mechanisms could be implemented to maximize ethylene generation. Finally, we modeled the annual ethylene generation for a scaled 1 MW solar farm at three different locations (Beijing, CN; Sydney, AUS; Barstow, CA) to determine the consequences of local meteorological climates on PV-EC CO 2 R product output, recording a maximum ethylene output of 18.5 tonne/yr at Barstow. Overall, this model presents a critical tool for streamlining the translation of experimental solar-driven electrochemical research to real-world implementation.

Yap, Kyra M. K.↗
DOE OSTI2026

Effects of 9.5 years warming on SOC concentration and composition in bulk soil and density fractions

Original data of whole-soil warming experiment after 9.5 years at Blodgett Forest Research Station. The Blodgett Forest is a mixed coniferous temperate forest with Mediterranean climate. The annual air temperature is 12.5℃ and the annual precipitation is 1774 mm yr-1- The soil is mesic ultic Alfisol of granitic origin, equivalent to Dystric Cambisol according to The World Reference Base for Soil Resources (WRB) system. The soil is warmed down to 1 m at + 4℃ by vertically installed heating cables. At the time of soil sampling on 1 May 2023, the whole-soil warming experiment had been running for approximately 9.5 years, from January 2014 to May 2023. The dataset includes: - Bulk_EA: C, N content, δ13C, and CN ratio of bulk soil; - Density_fractionation: organic carbon concentration, δ13C, and C/N ratio of free light fraction (fLF), occluded ligh fraction (oLF), and heavy fraction (HF); - PCA_DRIFT_AUC: original data of area under the curve (AUC) values of eight carbon bond types integrated on diffuse reflectance infrared fourier transform spectroscopy for each soil sample and soil fraction, which are consequently used for principal component analysis (PCA); - DRIFTS_stability_index: the calculation of aliphatic C–H (3000–2800 cm-1) to aromatic C=C (1670–1600 cm-1) ratios for each bulk soil sample and soil fraction. All data are provided in CSV format and can be viewed using Microsoft Excel.

Climate change↗
DOE OSTI2020

Materials Data on CoH9(CN2)3 by Materials Project

CoCo(NH3)6(CN)6 crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three azane;cobalt molecules, three cobalt molecules, and eighteen hydrogen cyanide molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrCoH18(CN2)6 by Materials Project

CrCo(NH3)6(CN)6 crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three azane;cobalt molecules, three chrom molecules, and eighteen hydrogen cyanide molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H2CN2 by Materials Project

N(CN)2NH4 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four ammonium molecules and four cyanamide, cyano- molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CrH9(CN2)3 by Materials Project

CrCr(NH3)6(CN)6 crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three chromium molecules, eighteen hydrogen cyanide molecules, and three Cr(NH3)6 clusters. In each Cr(NH3)6 cluster, Cr3+ is bonded in an octahedral geometry to six equivalent N3- atoms. All Cr–N bond lengths are 2.11 Å. N3- is bonded in a distorted trigonal non-coplanar geometry to one Cr3+ and three H1+ atoms. There is two shorter (1.03 Å) and one longer (1.04 Å) N–H bond length. 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 HCN by Materials Project

C(CN)2CN2H4 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of eight hydrogen cyanide molecules, four methane molecules, and four methanediamine molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2PtC4(BrN2)2 by Materials Project

K2Pt(CN)4Br2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to six N3- and two equivalent Br1- atoms. There are a spread of K–N bond distances ranging from 2.91–3.39 Å. There are one shorter (3.57 Å) and one longer (3.58 Å) K–Br bond lengths. Pt2- is bonded in an octahedral geometry to four C+3.50+ and two equivalent Br1- atoms. There are two shorter (2.01 Å) and two longer (2.02 Å) Pt–C bond lengths. Both Pt–Br bond lengths are 2.53 Å. There are two inequivalent C+3.50+ sites. In the first C+3.50+ site, C+3.50+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. In the second C+3.50+ site, C+3.50+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.17 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted single-bond geometry to three equivalent K1+ and one C+3.50+ atom. In the second N3- site, N3- is bonded in a distorted single-bond geometry to three equivalent K1+ and one C+3.50+ atom. Br1- is bonded in a 1-coordinate geometry to two equivalent K1+ and one Pt2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaC2N3 by Materials Project

NaN(CN)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six N3- atoms. There are a spread of Na–N bond distances ranging from 2.40–2.90 Å. In the second Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven N3- atoms. There are a spread of Na–N bond distances ranging from 2.57–2.90 Å. In the third Na1+ site, Na1+ is bonded to six N3- atoms to form distorted edge-sharing NaN6 octahedra. There are a spread of Na–N bond distances ranging from 2.42–3.02 Å. There are six inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.18 Å) and one longer (1.30 Å) C–N bond length. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.35–1.37 Å. In the third C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. All C–N bond lengths are 1.36 Å. In the fourth C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. All C–N bond lengths are 1.36 Å. In the fifth C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.19 Å) and one longer (1.29 Å) C–N bond length. In the sixth C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.19 Å) and one longer (1.30 Å) C–N bond length. There are nine inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted bent 120 degrees geometry to two Na1+ and two C4+ atoms. In the second N3- site, N3- is bonded in a distorted bent 120 degrees geometry to two equivalent Na1+ and two C4+ atoms. In the third N3- site, N3- is bonded in a 4-coordinate geometry to three Na1+ and one C4+ atom. In the fourth N3- site, N3- is bonded in a 4-coordinate geometry to three equivalent Na1+ and one C4+ atom. In the fifth N3- site, N3- is bonded in a 2-coordinate geometry to one Na1+ and two C4+ atoms. In the sixth N3- site, N3- is bonded in a 2-coordinate geometry to two equivalent Na1+ and two C4+ atoms. In the seventh N3- site, N3- is bonded in a 2-coordinate geometry to two equivalent Na1+ and two C4+ atoms. In the eighth N3- site, N3- is bonded in a 2-coordinate geometry to two equivalent Na1+ and two C4+ atoms. In the ninth N3- site, N3- is bonded in a 3-coordinate geometry to two Na1+ and one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C2SN2 by Materials Project

S(CN)2 crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of eight sulfur dicyanide molecules. there are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a distorted linear geometry to one N3- and one S2- atom. The C–N bond length is 1.17 Å. The C–S bond length is 1.70 Å. In the second C4+ site, C4+ is bonded in a distorted linear geometry to one N3- and one S2- atom. The C–N bond length is 1.17 Å. The C–S bond length is 1.70 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a single-bond geometry to one C4+ atom. In the second N3- site, N3- is bonded in a single-bond geometry to one C4+ atom. S2- is bonded in a 2-coordinate geometry to two C4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaC2N3 by Materials Project

NaN(CN)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded to six N3- atoms to form edge-sharing NaN6 octahedra. There are a spread of Na–N bond distances ranging from 2.49–2.57 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.19 Å) and one longer (1.30 Å) C–N bond length. In the second C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.18 Å) and one longer (1.30 Å) C–N bond length. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a rectangular see-saw-like geometry to three equivalent Na1+ and one C4+ atom. In the second N3- site, N3- is bonded in a 3-coordinate geometry to two equivalent Na1+ and one C4+ atom. In the third N3- site, N3- is bonded in a trigonal planar geometry to one Na1+ and two C4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C5N4 by Materials Project

C(CN)4 is Iron carbide-derived structured and crystallizes in the trigonal R3c space group. The structure is zero-dimensional and consists of twenty-four hydrogen cyanide molecules and six methane molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BH5C4(N2O)2 by Materials Project

(B)6(CN)4(H5(C2N)2)2(CNH2)4(CHNO2)4(N2H)4(H(CO)2)2H2 crystallizes in the orthorhombic Pnn2 space group. The structure is zero-dimensional and consists of six boron molecules; four carbamic acid molecules; four diazene molecules; two formalin formaldehyde molecules; two hydrogen molecules; four hydrogen cyanide molecules; four methylamine molecules; and two n,n'-dimethylethylenediamine molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C6S3(N3Cl)2 by Materials Project

CNS(CN)2CNSNCC(Cl2)NS crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four 1,2,4-thiadiazole molecules; four hydrogen cyanide molecules; four CNS clusters; and four NCC(Cl2)NS clusters. In each CNS cluster, C4+ is bonded in a distorted single-bond geometry to one S2- atom. The C–S bond length is 1.63 Å. N+2.67- is bonded in a single-bond geometry to one S2- atom. The N–S bond length is 1.53 Å. S2- is bonded in a 2-coordinate geometry to one C4+ and one N+2.67- atom. In each NCC(Cl2)NS cluster, there are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a bent 120 degrees geometry to one N+2.67- and one Cl1- atom. The C–N bond length is 1.29 Å. The C–Cl bond length is 1.74 Å. In the second C4+ site, C4+ is bonded in a bent 120 degrees geometry to one N+2.67- and one Cl1- atom. The C–N bond length is 1.30 Å. The C–Cl bond length is 1.78 Å. There are two inequivalent N+2.67- sites. In the first N+2.67- site, N+2.67- is bonded in a bent 120 degrees geometry to one C4+ and one S2- atom. The N–S bond length is 1.63 Å. In the second N+2.67- site, N+2.67- is bonded in a bent 120 degrees geometry to one C4+ and one S2- atom. The N–S bond length is 1.64 Å. S2- is bonded in a distorted water-like geometry to two N+2.67- atoms. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one C4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one C4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C4N3 by Materials Project

C(CN)3 crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of sixteen dimethylamine molecules and thirty-two hydrogen cyanide molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pd(CN2)2 by Materials Project

PdN2(CN)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four azanide;palladium(2+) molecules and eight hydrogen cyanide molecules.

36 MATERIALS SCIENCE↗