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At least 757 records · Page 42
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ba3BiIr2O9 by Materials Project

Ba3BiIr2O9 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.02 Å. In the second Ba2+ site, Ba2+ is bonded in a 12-coordinate geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.24 Å. Ir+4.50+ is bonded to six O2- atoms to form IrO6 octahedra that share corners with three equivalent BiO6 octahedra and a faceface with one IrO6 octahedra. The corner-sharing octahedra tilt angles range from 9–17°. There are a spread of Ir–O bond distances ranging from 1.99–2.08 Å. Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six equivalent IrO6 octahedra. The corner-sharing octahedra tilt angles range from 9–17°. There are a spread of Bi–O bond distances ranging from 2.29–2.32 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three Ba2+, one Ir+4.50+, and one Bi3+ atom. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ba2+, one Ir+4.50+, and one Bi3+ atom. In the third O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two equivalent Ir+4.50+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to four Ba2+, one Ir+4.50+, and one Bi3+ atom. In the fifth O2- site, O2- is bonded in a 6-coordinate geometry to four Ba2+ and two equivalent Ir+4.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Y4CdIr by Materials Project

Y4IrCd 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 Ir and three equivalent Cd atoms. All Y–Ir bond lengths are 2.85 Å. All Y–Cd bond lengths are 3.44 Å. In the second Y site, Y is bonded in a distorted bent 150 degrees geometry to two equivalent Ir and two equivalent Cd atoms. Both Y–Ir bond lengths are 2.82 Å. Both Y–Cd bond lengths are 3.52 Å. In the third Y site, Y is bonded in a 4-coordinate geometry to two equivalent Ir and two equivalent Cd atoms. Both Y–Ir bond lengths are 3.50 Å. Both Y–Cd bond lengths are 3.29 Å. Ir 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 3.11 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg4B3Ir2 by Materials Project

Mg4Ir2B3 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded in a 8-coordinate geometry to four equivalent Ir and four B atoms. There are a spread of Mg–Ir bond distances ranging from 2.73–2.98 Å. There are a spread of Mg–B bond distances ranging from 2.47–2.88 Å. In the second Mg site, Mg is bonded in a 1-coordinate geometry to three B atoms. There are a spread of Mg–B bond distances ranging from 2.37–2.49 Å. Ir is bonded in a 3-coordinate geometry to four equivalent Mg and three B atoms. There are a spread of Ir–B bond distances ranging from 2.00–2.17 Å. There are three inequivalent B sites. In the first B site, B is bonded in a 7-coordinate geometry to six Mg, two equivalent Ir, and one B atom. The B–B bond length is 1.69 Å. In the second B site, B is bonded in a 9-coordinate geometry to six Mg, two equivalent Ir, and one B atom. In the third B site, B is bonded in a square co-planar geometry to two equivalent Mg and two equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd4CdIr by Materials Project

Nd4IrCd 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 Ir and three equivalent Cd atoms. All Nd–Ir bond lengths are 2.91 Å. All Nd–Cd bond lengths are 3.57 Å. In the second Nd site, Nd is bonded in a distorted bent 150 degrees geometry to two equivalent Ir and two equivalent Cd atoms. Both Nd–Ir bond lengths are 2.90 Å. Both Nd–Cd bond lengths are 3.62 Å. In the third Nd site, Nd is bonded in a 4-coordinate geometry to two equivalent Ir and two equivalent Cd atoms. Both Nd–Ir bond lengths are 3.59 Å. Both Nd–Cd bond lengths are 3.40 Å. Ir 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 3.17 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb6IrBr10 by Materials Project

Tb6IrBr10 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Tb sites. In the first Tb site, Tb is bonded to one Ir and five Br atoms to form a mixture of edge and corner-sharing TbIrBr5 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. The Tb–Ir bond length is 2.71 Å. There are a spread of Tb–Br bond distances ranging from 2.85–3.10 Å. In the second Tb site, Tb is bonded to one Ir and five Br atoms to form a mixture of edge and corner-sharing TbIrBr5 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. The Tb–Ir bond length is 2.74 Å. There are a spread of Tb–Br bond distances ranging from 2.82–3.08 Å. In the third Tb site, Tb is bonded to one Ir and five Br atoms to form a mixture of edge and corner-sharing TbIrBr5 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. The Tb–Ir bond length is 2.68 Å. There are a spread of Tb–Br bond distances ranging from 2.92–3.08 Å. Ir is bonded in an octahedral geometry to six Tb atoms. There are five inequivalent Br sites. In the first Br site, Br is bonded in a see-saw-like geometry to four Tb atoms. In the second Br site, Br is bonded in a T-shaped geometry to three Tb atoms. In the third Br site, Br is bonded in a T-shaped geometry to three Tb atoms. In the fourth Br site, Br is bonded in a 3-coordinate geometry to three Tb atoms. In the fifth Br site, Br is bonded in an L-shaped geometry to two Tb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm4CdIr by Materials Project

Sm4IrCd crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are three inequivalent Sm sites. In the first Sm site, Sm is bonded in a 3-coordinate geometry to three equivalent Ir and three equivalent Cd atoms. All Sm–Ir bond lengths are 2.89 Å. All Sm–Cd bond lengths are 3.52 Å. In the second Sm site, Sm is bonded in a distorted bent 150 degrees geometry to two equivalent Ir and two equivalent Cd atoms. Both Sm–Ir bond lengths are 2.86 Å. Both Sm–Cd bond lengths are 3.58 Å. In the third Sm site, Sm is bonded in a 4-coordinate geometry to two equivalent Ir and two equivalent Cd atoms. Both Sm–Ir bond lengths are 3.55 Å. Both Sm–Cd bond lengths are 3.34 Å. Ir is bonded in a 6-coordinate geometry to nine Sm atoms. Cd is bonded to nine Sm and three equivalent Cd atoms to form a mixture of distorted corner and face-sharing CdSm9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.17 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy4MgIr by Materials Project

MgDy4Ir crystallizes in the cubic F-43m space group. The structure is three-dimensional. Mg is bonded to three equivalent Mg and nine Dy atoms to form a mixture of face and corner-sharing MgDy9Mg3 cuboctahedra. All Mg–Mg bond lengths are 3.08 Å. There are a spread of Mg–Dy bond distances ranging from 3.32–3.56 Å. There are three inequivalent Dy sites. In the first Dy site, Dy is bonded in a 3-coordinate geometry to three equivalent Mg, three equivalent Dy, and three equivalent Ir atoms. All Dy–Dy bond lengths are 3.52 Å. All Dy–Ir bond lengths are 2.83 Å. In the second Dy site, Dy is bonded in a bent 150 degrees geometry to two equivalent Mg, four equivalent Dy, and two equivalent Ir atoms. All Dy–Dy bond lengths are 3.65 Å. Both Dy–Ir bond lengths are 2.82 Å. In the third Dy site, Dy is bonded in a 4-coordinate geometry to two equivalent Mg, ten Dy, and two equivalent Ir atoms. All Dy–Dy bond lengths are 3.62 Å. Both Dy–Ir bond lengths are 3.52 Å. Ir is bonded in a 6-coordinate geometry to nine Dy atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy4InIr by Materials Project

Dy4IrIn 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 Ir and three equivalent In atoms. All Dy–Ir bond lengths are 2.84 Å. All Dy–In bond lengths are 3.46 Å. In the second Dy site, Dy is bonded in a distorted bent 150 degrees geometry to two equivalent Ir and two equivalent In atoms. Both Dy–Ir bond lengths are 2.81 Å. Both Dy–In bond lengths are 3.50 Å. In the third Dy site, Dy is bonded in a 4-coordinate geometry to two equivalent Ir and two equivalent In atoms. Both Dy–Ir bond lengths are 3.48 Å. Both Dy–In bond lengths are 3.25 Å. Ir is bonded in a 6-coordinate geometry to nine Dy atoms. In is bonded in a 12-coordinate geometry to nine Dy and three equivalent In atoms. All In–In bond lengths are 3.20 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La4CdIr by Materials Project

La4IrCd 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 Ir and three equivalent Cd atoms. All La–Ir bond lengths are 2.96 Å. All La–Cd bond lengths are 3.64 Å. In the second La site, La is bonded in a distorted bent 150 degrees geometry to two equivalent Ir and two equivalent Cd atoms. Both La–Ir bond lengths are 2.95 Å. Both La–Cd bond lengths are 3.67 Å. In the third La site, La is bonded in a 4-coordinate geometry to two equivalent Ir and two equivalent Cd atoms. Both La–Ir bond lengths are 3.64 Å. Both La–Cd bond lengths are 3.43 Å. Ir 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 corner and face-sharing CdLa9Cd3 cuboctahedra. All Cd–Cd bond lengths are 3.27 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Lu4CdIr by Materials Project

Lu4IrCd 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 Ir and three equivalent Cd atoms. All Lu–Ir bond lengths are 2.78 Å. All Lu–Cd bond lengths are 3.38 Å. In the second Lu site, Lu is bonded in a distorted bent 150 degrees geometry to two equivalent Ir and two equivalent Cd atoms. Both Lu–Ir bond lengths are 2.76 Å. Both Lu–Cd bond lengths are 3.43 Å. In the third Lu site, Lu is bonded in a 4-coordinate geometry to two equivalent Ir and two equivalent Cd atoms. Both Lu–Ir bond lengths are 3.41 Å. Both Lu–Cd bond lengths are 3.20 Å. Ir 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 3.09 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tb6IrI10 by Materials Project

Tb6IrI10 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Tb sites. In the first Tb site, Tb is bonded to one Ir and five I atoms to form a mixture of corner and edge-sharing TbIrI5 octahedra. The corner-sharing octahedra tilt angles range from 0–7°. The Tb–Ir bond length is 2.76 Å. There are a spread of Tb–I bond distances ranging from 3.04–3.34 Å. In the second Tb site, Tb is bonded to one Ir and five I atoms to form a mixture of corner and edge-sharing TbIrI5 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. The Tb–Ir bond length is 2.74 Å. There are a spread of Tb–I bond distances ranging from 3.06–3.34 Å. In the third Tb site, Tb is bonded to one Ir and five I atoms to form a mixture of distorted corner and edge-sharing TbIrI5 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. The Tb–Ir bond length is 2.70 Å. There are a spread of Tb–I bond distances ranging from 3.12–3.34 Å. Ir is bonded in an octahedral geometry to six Tb atoms. There are five inequivalent I sites. In the first I site, I is bonded in a distorted L-shaped geometry to two Tb atoms. In the second I site, I is bonded in a distorted T-shaped geometry to three Tb atoms. In the third I site, I is bonded in a distorted see-saw-like geometry to four Tb atoms. In the fourth I site, I is bonded in a distorted T-shaped geometry to three Tb atoms. In the fifth I site, I is bonded in a distorted T-shaped geometry to three Tb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La5Ir2 by Materials Project

La5Ir2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent La sites. In the first La site, La is bonded in a distorted bent 150 degrees geometry to three equivalent Ir atoms. There are a spread of La–Ir bond distances ranging from 2.82–3.73 Å. In the second La site, La is bonded to four equivalent Ir atoms to form distorted edge-sharing LaIr4 tetrahedra. There are two shorter (3.05 Å) and two longer (3.07 Å) La–Ir bond lengths. In the third La site, La is bonded in a 3-coordinate geometry to three equivalent Ir atoms. There are a spread of La–Ir bond distances ranging from 2.92–3.33 Å. Ir is bonded in a 7-coordinate geometry to eight La atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La3Ir2 by Materials Project

La3Ir2 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are three inequivalent La sites. In the first La site, La is bonded in an octahedral geometry to six equivalent Ir atoms. All La–Ir bond lengths are 3.10 Å. In the second La site, La is bonded in a 6-coordinate geometry to six equivalent Ir atoms. There are three shorter (2.95 Å) and three longer (3.17 Å) La–Ir bond lengths. In the third La site, La is bonded in a 5-coordinate geometry to five equivalent Ir atoms. There are a spread of La–Ir bond distances ranging from 2.95–3.37 Å. Ir is bonded in a 8-coordinate geometry to eight La atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pr7Ir3 by Materials Project

Pr7Ir3 crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are three inequivalent Pr sites. In the first Pr site, Pr is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ir atoms. All Pr–Ir bond lengths are 2.91 Å. In the second Pr site, Pr is bonded in a distorted water-like geometry to two equivalent Ir atoms. Both Pr–Ir bond lengths are 2.94 Å. In the third Pr site, Pr is bonded in a 3-coordinate geometry to three equivalent Ir atoms. There are one shorter (2.97 Å) and two longer (2.99 Å) Pr–Ir bond lengths. Ir is bonded in a 6-coordinate geometry to six Pr atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ReIr2(NCl)10 by Materials Project

ReCl6(IrN5Cl2)2 is Calaverite-like structured and crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of two hexachlororhenium molecules and four IrN5Cl2 clusters. In each IrN5Cl2 cluster, Ir+4.50+ is bonded in a 3-coordinate geometry to five N+0.60- and one Cl1- atom. There are a spread of Ir–N bond distances ranging from 1.78–2.36 Å. The Ir–Cl bond length is 2.52 Å. There are three inequivalent N+0.60- sites. In the first N+0.60- site, N+0.60- is bonded in a single-bond geometry to one Ir+4.50+ atom. In the second N+0.60- site, N+0.60- is bonded in a distorted L-shaped geometry to one Ir+4.50+ and one Cl1- atom. The N–Cl bond length is 1.53 Å. In the third N+0.60- site, N+0.60- is bonded in a single-bond geometry to one Ir+4.50+ atom. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one Ir+4.50+ atom. In the second Cl1- site, Cl1- is bonded in a bent 120 degrees geometry to two equivalent N+0.60- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ho4CdIr by Materials Project

Ho4IrCd 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 Ir and three equivalent Cd atoms. All Ho–Ir bond lengths are 2.82 Å. All Ho–Cd bond lengths are 3.42 Å. In the second Ho site, Ho is bonded in a distorted bent 150 degrees geometry to two equivalent Ir and two equivalent Cd atoms. Both Ho–Ir bond lengths are 2.80 Å. Both Ho–Cd bond lengths are 3.48 Å. In the third Ho site, Ho is bonded in a 4-coordinate geometry to two equivalent Ir and two equivalent Cd atoms. Both Ho–Ir bond lengths are 3.47 Å. Both Ho–Cd bond lengths are 3.25 Å. Ir 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 3.12 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2026

Durable Thin‐Film Porous Transport Electrodes for High Current Density PEM Water Electrolysis

Proton exchange membrane water electrolyzers rely on relatively expensive Ir-based catalysts for efficient and durable hydrogen production. To reduce system costs, Ir loadings can be reduced if performance and durability are maintained. Sputter deposition is a readily scalable method to synthesize uniform, low-loading catalyst layers with controlled composition. A catalyst applied directly to the porous transport layer can have advantages for performance, manufacturing simplicity, and catalyst recovery. Suitable porous transport layer porosity can minimize activity losses when reducing loadings. Here, methods are presented to deposit metallic Ir as well as amorphous and rutile Ir oxides. The activity and durability of these materials in the porous transport electrode architecture is evaluated. The metallic and amorphous forms have better initial activity, however, operation at 3 A cm −2 with 0.1 mg Ir cm −2 shows that only rutile IrO 2 maintains performance beyond 100 h with a 50 mV improvement after 700 h. A >10x reduced dissolution rate is shown for rutile IrO 2 . With a low-porosity transport layer and 0.4 mg Ir cm −2 , a steady-state voltage decay rate of 6 µV h −1 is achieved. The results demonstrate that sputter-deposited rutile IrO 2 porous transport electrodes with low Ir loading can be operated at high current density to reduce hydrogen production costs.

08 HYDROGEN↗
DOE OSTI2021

SIRT3 mediates mitofusin 2 ubiquitination and degradation to suppress ischemia reperfusion-induced acute kidney injury

Ischemia reperfusion-induced acute kidney injury (IR-induced AKI) is a life-threatening disease with many complications. Mitofusin 2 (Mfn2) ubiquitination is related to AKI. But the underlying molecular mechanisms remain unknown. This study aimed to probe the mechanism of Mfn2 ubiquitination in IR-induced AKI development. In IR-induced AKI mouse models, orbital blood and urine were collected for assessing kidney function. The kidney injury, ultrastructure of mitochondria, and histopathology in mice were evaluated after injection of G5, an ubiquitination inhibitor. Oxygen glucose deprivation/reoxygenation (OGD/R) models were established in HK-2 cells, and the mitochondria were extracted. Cell viability, apoptosis, oxidative stress, inflammatory reaction, mitochondrial membrane potential, and ATP production were measured. Mfn2 ubiquitination in mouse and cell models was evaluated. si-SIRT3 and pcDNA3.1-SIRT3 were transfected into cell models. Consequently, kidney function in mice was impaired by IR-induced AKI. Mfn2 ubiquitination and degradation promoted IR-induced AKI. OGD/R induced renal tubular epithelial cell injury and disrupted mitochondrial dynamics and functions through promoting Mfn2 ubiquitination. SIRT3 knockdown led to Mfn2 ubiquitination by binding to UBC; while its overexpression alleviated tubular epithelial cell injury. Briefly, SIRT3 mediates Mfn2 ubiquitination to relieve IR-induced AKI. This investigation may offer new insights for the treatment of IR-induced AKI injury.

60 APPLIED LIFE SCIENCES↗