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At least 343 records · Page 19
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Na4XeO14 by Materials Project

XeNa4O14 crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Xe is bonded in a single-bond geometry to one O atom. The Xe–O bond length is 2.03 Å. There are two inequivalent Na sites. In the first Na site, Na is bonded in a 3-coordinate geometry to eight O atoms. There are a spread of Na–O bond distances ranging from 2.40–3.02 Å. In the second Na site, Na is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.21–2.57 Å. There are eight inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to two O atoms. There is one shorter (1.35 Å) and one longer (1.41 Å) O–O bond length. In the second O site, O is bonded in a distorted T-shaped geometry to two Na and one O atom. The O–O bond length is 1.27 Å. In the third O site, O is bonded in a distorted trigonal planar geometry to two Na and one O atom. In the fourth O site, O is bonded in a 4-coordinate geometry to three Na and one O atom. The O–O bond length is 1.37 Å. In the fifth O site, O is bonded in a 2-coordinate geometry to two equivalent Na and two equivalent O atoms. In the sixth O site, O is bonded in a 4-coordinate geometry to three Na and one O atom. In the seventh O site, O is bonded in a distorted T-shaped geometry to one Xe and two equivalent Na atoms. In the eighth O site, O is bonded in a distorted water-like geometry to one Na and one O atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cu23PdN8 by Materials Project

PdCu23N8 is High-temperature superconductor-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Pd is bonded in a linear geometry to two equivalent N atoms. Both Pd–N bond lengths are 2.04 Å. There are fifteen inequivalent Cu sites. In the first Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the second Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the third Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the fourth Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the fifth Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the sixth Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the seventh Cu site, Cu is bonded in a linear geometry to two N atoms. There is one shorter (1.90 Å) and one longer (1.91 Å) Cu–N bond length. In the eighth Cu site, Cu is bonded in a linear geometry to two equivalent N atoms. Both Cu–N bond lengths are 1.93 Å. In the ninth Cu site, Cu is bonded in a linear geometry to two equivalent N atoms. Both Cu–N bond lengths are 1.93 Å. In the tenth Cu site, Cu is bonded in a linear geometry to two equivalent N atoms. Both Cu–N bond lengths are 1.83 Å. In the eleventh Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the twelfth Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the thirteenth Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the fourteenth Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. In the fifteenth Cu site, Cu is bonded in a linear geometry to two N atoms. Both Cu–N bond lengths are 1.90 Å. There are three inequivalent N sites. In the first N site, N is bonded to one Pd and five Cu atoms to form corner-sharing NCu5Pd octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the second N site, N is bonded to six Cu atoms to form corner-sharing NCu6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the third N site, N is bonded to six Cu atoms to form corner-sharing NCu6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ScI5N3 by Materials Project

ScNI4IN2 crystallizes in the orthorhombic Pnma space group. The structure is one-dimensional and consists of four IN2 clusters and four ScNI4 ribbons oriented in the (1, 0, 0) direction. In each IN2 cluster, N1+ is bonded in a single-bond geometry to one I1- atom. The N–I bond length is 1.89 Å. I1- is bonded in a water-like geometry to two equivalent N1+ atoms. In each ScNI4 ribbon, Sc2+ is bonded in a 1-coordinate geometry to four I1- atoms. There are a spread of Sc–I bond distances ranging from 2.67–3.01 Å. N1+ is bonded in a distorted water-like geometry to two equivalent I1- atoms. Both N–I bond lengths are 2.15 Å. There are three inequivalent I1- sites. In the first I1- site, I1- is bonded in a single-bond geometry to one Sc2+ atom. In the second I1- site, I1- is bonded in a single-bond geometry to one Sc2+ atom. In the third I1- site, I1- is bonded in a distorted bent 120 degrees geometry to one Sc2+ and one N1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Pb(SO4)2 by Materials Project

K2Pb(SO4)2 is Copper structured and crystallizes in the trigonal R-3m space group. The structure is zero-dimensional and consists of three K2Pb(SO4)2 clusters. K1+ is bonded in a single-bond geometry to one O2- atom. The K–O bond length is 2.45 Å. Pb2+ is bonded in a hexagonal planar geometry to six equivalent O2- atoms. All Pb–O bond lengths are 2.53 Å. S6+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.45 Å) and three longer (1.53 Å) S–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Pb2+ and one S6+ atom. In the second O2- site, O2- is bonded in a linear geometry to one K1+ and one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C2SNCl2F5 by Materials Project

CF3CF2NSCl2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of eight difluoromethane molecules, eight fluoroform molecules, and eight NSCl2 clusters. In each NSCl2 cluster, N1+ is bonded in a distorted single-bond geometry to one S2- atom. The N–S bond length is 1.51 Å. S2- is bonded in a distorted trigonal non-coplanar geometry to one N1+ and two Cl1- atoms. Both S–Cl bond lengths are 2.12 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one S2- atom. In the second Cl1- site, Cl1- is bonded in a distorted single-bond geometry to one S2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zr4O by Materials Project

Zr4O crystallizes in the trigonal R-3 space group. The structure is two-dimensional and consists of three Zr4O sheets oriented in the (0, 0, 1) direction. there are two inequivalent Zr sites. In the first Zr site, Zr is bonded in a single-bond geometry to one O atom. The Zr–O bond length is 2.29 Å. In the second Zr site, Zr is bonded in a distorted bent 120 degrees geometry to two O atoms. Both Zr–O bond lengths are 2.28 Å. There are two inequivalent O sites. In the first O site, O is bonded to six equivalent Zr atoms to form corner-sharing OZr6 octahedra. The corner-sharing octahedral tilt angles are 47°. In the second O site, O is bonded to six Zr atoms to form corner-sharing OZr6 octahedra. The corner-sharing octahedral tilt angles are 47°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H4SO5 by Materials Project

H4SO5 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are four 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 distorted single-bond geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.62 Å) H–O bond length. 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 (1.50 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.61 Å) H–O bond length. S6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of S–O bond distances ranging from 1.45–1.60 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to one H1+ and one S6+ atom. In the second O2- site, O2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one H1+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one H1+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a linear geometry to one H1+ and one S6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C12SeF10 by Materials Project

(CF)4C8SeF6 crystallizes in the monoclinic P2_1 space group. The structure is one-dimensional and consists of eight fluoromethane molecules and one C8SeF6 ribbon oriented in the (0, 1, 0) direction. In the C8SeF6 ribbon, there are eight inequivalent C1+ sites. In the first C1+ site, C1+ is bonded in a single-bond geometry to one C1+ and one F1- atom. The C–C bond length is 1.40 Å. The C–F bond length is 1.35 Å. In the second C1+ site, C1+ is bonded in a distorted trigonal planar geometry to two C1+ and one Se2- atom. The C–C bond length is 1.40 Å. The C–Se bond length is 1.93 Å. In the third C1+ site, C1+ is bonded in a single-bond geometry to one C1+ and one F1- atom. The C–C bond length is 1.40 Å. The C–F bond length is 1.35 Å. In the fourth C1+ site, C1+ is bonded in a single-bond geometry to one F1- atom. The C–F bond length is 1.35 Å. In the fifth C1+ site, C1+ is bonded in a single-bond geometry to one C1+ and one F1- atom. The C–F bond length is 1.35 Å. In the sixth C1+ site, C1+ is bonded in a distorted trigonal planar geometry to two C1+ and one Se2- atom. The C–C bond length is 1.40 Å. The C–Se bond length is 1.93 Å. In the seventh C1+ site, C1+ is bonded in a single-bond geometry to one C1+ and one F1- atom. The C–F bond length is 1.35 Å. In the eighth C1+ site, C1+ is bonded in a single-bond geometry to one F1- atom. The C–F bond length is 1.35 Å. Se2- is bonded in a 2-coordinate geometry to two C1+ and seven F1- atoms. There are a spread of Se–F bond distances ranging from 3.12–3.58 Å. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one C1+ and one Se2- atom. In the second F1- site, F1- is bonded in a single-bond geometry to one C1+ and one Se2- atom. In the third F1- site, F1- is bonded in a single-bond geometry to one C1+ and one Se2- atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one C1+ and one Se2- atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one C1+ and two equivalent Se2- atoms. In the sixth F1- site, F1- is bonded in a single-bond geometry to one C1+ and one Se2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te6H6S(Cl13O2)2 by Materials Project

(H3Te3OCl13)2SO2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two sulfur dioxide molecules and four H3Te3OCl13 clusters. In each H3Te3OCl13 cluster, there are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- and one Cl1- atom. The H–O bond length is 1.02 Å. The H–Cl bond length is 2.06 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.02 Å. There are two inequivalent Te5+ sites. In the first Te5+ site, Te5+ is bonded to six Cl1- atoms to form edge-sharing TeCl6 octahedra. There are a spread of Te–Cl bond distances ranging from 2.36–2.98 Å. In the second Te5+ site, Te5+ is bonded to six Cl1- atoms to form edge-sharing TeCl6 octahedra. There are a spread of Te–Cl bond distances ranging from 2.36–2.99 Å. O2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms. There are eight inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 3-coordinate geometry to two equivalent Te5+ atoms. In the second Cl1- site, Cl1- is bonded in a distorted trigonal non-coplanar geometry to one H1+ and two Te5+ atoms. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Te5+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Te5+ atom. In the fifth Cl1- site, Cl1- is bonded in a 3-coordinate geometry to three Te5+ atoms. In the sixth Cl1- site, Cl1- is bonded in a single-bond geometry to one Te5+ atom. In the seventh Cl1- site, Cl1- is bonded in a single-bond geometry to one Te5+ atom. In the eighth Cl1- site, Cl1- is bonded in a single-bond geometry to one Te5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mo8P9Br(N3O14)4 by Materials Project

(Mo2P2O13)4(N2)4PO4N4Br crystallizes in the tetragonal P-4 space group. The structure is two-dimensional and consists of eight ammonia molecules; one phosphoric acid molecule; one N4Br cluster; and two Mo2P2O13 sheets oriented in the (0, 0, 1) direction. In the N4Br cluster, N is bonded in a single-bond geometry to one Br atom. The N–Br bond length is 2.17 Å. Br is bonded in a rectangular see-saw-like geometry to four equivalent N atoms. In each Mo2P2O13 sheet, there are two inequivalent Mo sites. In the first Mo site, Mo is bonded to six O atoms to form distorted MoO6 octahedra that share a cornercorner with one MoO6 octahedra and corners with three PO4 tetrahedra. The corner-sharing octahedral tilt angles are 26°. There are a spread of Mo–O bond distances ranging from 1.73–2.24 Å. In the second Mo site, Mo is bonded to six O atoms to form distorted MoO6 octahedra that share a cornercorner with one MoO6 octahedra and corners with three PO4 tetrahedra. The corner-sharing octahedral tilt angles are 27°. There are a spread of Mo–O bond distances ranging from 1.75–2.32 Å. There are two inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three MoO6 octahedra. The corner-sharing octahedra tilt angles range from 17–48°. There is two shorter (1.54 Å) and two longer (1.55 Å) P–O bond length. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three MoO6 octahedra. The corner-sharing octahedra tilt angles range from 34–48°. There are a spread of P–O bond distances ranging from 1.53–1.55 Å. There are fourteen inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two equivalent Mo atoms. In the second O site, O is bonded in a single-bond geometry to one Mo atom. In the third O site, O is bonded in a distorted single-bond geometry to one Mo and one P atom. In the fourth O site, O is bonded in a distorted bent 150 degrees geometry to one Mo and one P atom. In the fifth O site, O is bonded in a distorted linear geometry to one Mo and one P atom. In the sixth O site, O is bonded in a distorted single-bond geometry to one Mo and one P atom. In the seventh O site, O is bonded in a single-bond geometry to one Mo atom. In the eighth O site, O is bonded in a bent 150 degrees geometry to one Mo and one P atom. In the ninth O site, O is bonded in a single-bond geometry to one Mo atom. In the tenth O site, O is bonded in a bent 150 degrees geometry to two equivalent Mo atoms. In the eleventh O site, O is bonded in a 1-coordinate geometry to one Mo and one P atom. In the twelfth O site, O is bonded in a single-bond geometry to one P atom. In the thirteenth O site, O is bonded in a single-bond geometry to one Mo atom. In the fourteenth O site, O is bonded in a single-bond geometry to one P atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NClO6 by Materials Project

NO2ClO4 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four hydroxylamine, n-hydroxy- molecules and four ClO4 clusters. In each ClO4 cluster, there are two inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Cl atom. The O–Cl bond length is 1.47 Å. In the second O site, O is bonded in a single-bond geometry to one Cl atom. The O–Cl bond length is 1.45 Å. Cl is bonded in a tetrahedral geometry to four O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb19O3 by Materials Project

Rb(Rb6O)3 is Copper structured and crystallizes in the cubic Fm-3c space group. The structure is zero-dimensional and consists of eight rubidium molecules and twenty-four Rb6O clusters. In each Rb6O cluster, there are two inequivalent Rb sites. In the first Rb site, Rb is bonded in a single-bond geometry to one O atom. The Rb–O bond length is 2.63 Å. In the second Rb site, Rb is bonded in a single-bond geometry to one O atom. The Rb–O bond length is 2.95 Å. O is bonded in an octahedral geometry to six Rb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on P2H26AuC9Cl3O4 by Materials Project

AuC2H6(P(CH3)3)2CH2Cl2ClO4 crystallizes in the orthorhombic Cmc2_1 space group. The structure is zero-dimensional and consists of four dichloromethane molecules, four dimethylgold molecules, eight trimethylphosphine molecules, and four ClO4 clusters. In each ClO4 cluster, there are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.47 Å. In the second O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.47 Å. Cl1- is bonded in a tetrahedral geometry to four O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GaAs by Materials Project

GaAs crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are six inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded in a single-bond geometry to one As3- atom. The Ga–As bond length is 2.75 Å. In the second Ga3+ site, Ga3+ is bonded in a trigonal planar geometry to three As3- atoms. There are a spread of Ga–As bond distances ranging from 2.35–2.48 Å. In the third Ga3+ site, Ga3+ is bonded in a trigonal planar geometry to three As3- atoms. There are a spread of Ga–As bond distances ranging from 2.34–2.47 Å. In the fourth Ga3+ site, Ga3+ is bonded in a trigonal planar geometry to three As3- atoms. There are one shorter (2.43 Å) and two longer (2.47 Å) Ga–As bond lengths. In the fifth Ga3+ site, Ga3+ is bonded in a trigonal planar geometry to three As3- atoms. There are one shorter (2.43 Å) and two longer (2.48 Å) Ga–As bond lengths. In the sixth Ga3+ site, Ga3+ is bonded in a distorted trigonal pyramidal geometry to four As3- atoms. There are a spread of Ga–As bond distances ranging from 2.44–2.51 Å. There are six inequivalent As3- sites. In the first As3- site, As3- is bonded in a rectangular see-saw-like geometry to four Ga3+ atoms. In the second As3- site, As3- is bonded in a distorted trigonal non-coplanar geometry to three Ga3+ atoms. In the third As3- site, As3- is bonded in a distorted trigonal non-coplanar geometry to three Ga3+ atoms. In the fourth As3- site, As3- is bonded in a trigonal planar geometry to three Ga3+ atoms. In the fifth As3- site, As3- is bonded in a trigonal planar geometry to three Ga3+ atoms. In the sixth As3- site, As3- is bonded in a single-bond geometry to one Ga3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H25C8IN2(OF2)2 by Materials Project

(N(CH3)4)2HF2I(OF)2 is Silicon tetrafluoride-derived structured and crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of four hydrogen fluoride hydrogen fluoride molecules, eight tetramethylammonium molecules, and four I(OF)2 clusters. In each I(OF)2 cluster, O2- is bonded in a single-bond geometry to one I1- atom. The O–I bond length is 1.80 Å. I1- is bonded in a distorted rectangular see-saw-like geometry to two equivalent O2- and two F1- atoms. Both I–F bond lengths are 2.08 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one I1- atom. In the second F1- site, F1- is bonded in a single-bond geometry to one I1- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeN2Cl5 by Materials Project

CeCl4N2Cl crystallizes in the orthorhombic Pnma space group. The structure is one-dimensional and consists of four N2Cl clusters and two CeCl4 ribbons oriented in the (1, 0, 0) direction. In each N2Cl cluster, N1+ is bonded in a single-bond geometry to one Cl1- atom. The N–Cl bond length is 1.53 Å. Cl1- is bonded in a bent 120 degrees geometry to two equivalent N1+ atoms. In each CeCl4 ribbon, Ce3+ is bonded to six Cl1- atoms to form edge-sharing CeCl6 octahedra. There are a spread of Ce–Cl bond distances ranging from 2.51–2.76 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Ce3+ atoms. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Ce3+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Ce3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C6IF7 by Materials Project

(CF)5CIF2 crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of forty fluoromethane molecules; four CIF2 clusters; and two CIF2 ribbons oriented in the (1, 0, 0) direction. In each CIF2 cluster, C+1.33+ is bonded in a distorted single-bond geometry to one I1- atom. The C–I bond length is 2.08 Å. I1- is bonded in a 2-coordinate geometry to one C+1.33+ and two F1- atoms. There are one shorter (2.00 Å) and one longer (2.07 Å) I–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one I1- atom. In the second F1- site, F1- is bonded in a distorted single-bond geometry to one I1- atom. In each CIF2 ribbon, C+1.33+ is bonded in a distorted single-bond geometry to one I1- atom. The C–I bond length is 2.08 Å. I1- is bonded in a 4-coordinate geometry to one C+1.33+ and three F1- atoms. There are a spread of I–F bond distances ranging from 2.00–2.78 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one I1- atom. In the second F1- site, F1- is bonded in a 1-coordinate geometry to two equivalent I1- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2021

Single Atom Catalysts: A Review of Characterization Methods

Abstract Single atom catalysts (SACs) harbor a potential to exceed nanoparticle catalysts in terms of activity, stability and selectivity in a growing number of chemical reactions. Although their investigation is attracting significant attention, important fundamental questions focusing on key physicochemical properties of SACs (e. g., structure – property relationships, structural dynamics, reaction‐driven restructuring) remain unanswered. A main challenge for research in the field is how to reliably characterize the environments of single atoms in the presence of complicating factors such as low weight loadings, strong metal‐support interactions, and atomic and multiscale heterogeneity of bonding in the single atom sites. This review addresses this challenge – identifying catalytically relevant features of physicochemical properties of single atoms (charge state, electronic structure, atomic configuration, bonding interactions with a support) and surveying advanced tools/methods for characterizing them. The review places a strong emphasis on multimodal methods exploiting X‐ray absorption, emission and photoelectron spectroscopies, and provides several examples from the authors’ research that demonstrate their use as powerful tools for SAC characterization.

Kottwitz, Matthew↗