Intrinsic Electrocatalytic Activity Regulation of M–N–C Single‐Atom Catalysts for the Oxygen Reduction Reaction

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 60(9), P. 4448 - 4463

Published: April 21, 2020

Abstract Single‐atom catalysts (SACs) with highly active sites atomically dispersed on substrates exhibit unique advantages regarding maximum atomic efficiency, abundant chemical structures, and extraordinary catalytic performances for multiple important reactions. In particular, M–N–C SACs (M=transition metal atom) demonstrate optimal electrocatalytic activity the oxygen reduction reaction (ORR) have attracted extensive attention recently. Despite substantial efforts in fabricating various SACs, principles regulating intrinsic of their not been sufficiently studied. this Review, we summarize regulation strategies promoting ORR by modulation center atoms, coordinated environmental guest groups. Theoretical calculations experimental investigations are both included to afford a comprehensive understanding structure–performance relationship. Finally, future directions developing advanced other analogous reactions proposed.

Language: Английский

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Carbon-Based Single-Atom Catalysts for Advanced Applications

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(3), P. 2231 - 2259

Published: Jan. 10, 2020

Carbon-based materials are widely employed as metal-free catalysts or supports in catalysis, energy, and ecological applications because of their interesting properties. Generally, high surface areas, size, shape, porosity, the possibility incorporating additional moieties through chemical functional designs believed to be essential for enriching catalytic activity carbon-containing materials. Lately, new field single-atom (SACs) has emerged finest alternative not only homogeneous but also heterogeneous used various kinds applications. Among a variety SACs, carbon-based SACs investigated extraordinary features such tunable morphologies, ordered effortless immobilization metals (noble non-noble), making them highly efficient numerous important Herein, we intend report on progress achieved researching catalysts, including primarily Co, Cu, Zn, Pd, Ni, Pt, among others, embedded carbon matrices applied organic photocatalysis, electrocatalysis. It is point out that main focus this Review directed which discussed detail; thus, characterization rationalization excluded. Finally, provide future perspective development made single metal atom catalysis.

Language: Английский

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Theoretical Understandings of Graphene-based Metal Single-Atom Catalysts: Stability and Catalytic Performance

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 12315 - 12341

Published: Oct. 28, 2020

Research on heterogeneous single-atom catalysts (SACs) has become an emerging frontier in catalysis science because of their advantages high utilization noble metals, precisely identified active sites, selectivity, and tunable activity. Graphene, as a one-atom-thick two-dimensional carbon material with unique structural electronic properties, been reported to be superb support for SACs. Herein, we provide overview recent progress investigations graphene-based Among the large number publications, will selectively focus stability metal single-atoms (SAs) anchored different sites graphene catalytic performances SACs chemical reactions, including thermocatalysis electrocatalysis. We summarize fundamental understandings structures intrinsic connection properties SACs, also brief perspective future design efficient graphene-like materials.

Language: Английский

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Design concept for electrocatalysts

Nano Research, Journal Year: 2021, Volume and Issue: 15(3), P. 1730 - 1752

Published: Sept. 4, 2021

Language: Английский

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Scalable two-step annealing method for preparing ultra-high-density single-atom catalyst libraries

Nature Nanotechnology, Journal Year: 2021, Volume and Issue: 17(2), P. 174 - 181

Published: Nov. 25, 2021

Language: Английский

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Direct Methane Conversion under Mild Condition by Thermo-, Electro-, or Photocatalysis

Chem, Journal Year: 2019, Volume and Issue: 5(9), P. 2296 - 2325

Published: May 27, 2019

Language: Английский

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Protruding Pt single-sites on hexagonal ZnIn2S4 to accelerate photocatalytic hydrogen evolution

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: March 11, 2022

Single-site cocatalysts engineered on supports offer a cost-efficient pathway to utilize precious metals, yet improving the performance further with minimal catalyst loading is still highly desirable. Here we have conducted photochemical reaction stabilize ultralow Pt co-catalysts (0.26 wt%) onto basal plane of hexagonal ZnIn2S4 nanosheets (PtSS-ZIS) form Pt-S3 protrusion tetrahedron coordination structure. Compared traditional defect-trapped single-site counterparts, protruding single-sites h-ZIS photocatalyst enhance H2 evolution yield rate by factor 2.2, which could reach 17.5 mmol g-1 h-1 under visible light irradiation. Importantly, through simple drop-casting, thin PtSS-ZIS film prepared, and large amount observable bubbles are generated, providing great potential for practical solar-light-driven production. The single atoms in inhibit recombination electron-hole pairs cause tip effect optimize adsorption/desorption behavior H effective proton mass transfer, synergistically promote thermodynamics kinetics.

Language: Английский

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The Progress and Outlook of Metal Single-Atom-Site Catalysis

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(40), P. 18155 - 18174

Published: Sept. 29, 2022

Single-atom-site catalysts (SASCs) featuring maximized atom utilization and isolated active sites have progressed tremendously in recent years as a highly prosperous branch of catalysis research. Varieties SASCs been developed that show excellent performance many catalytic applications. The major goal SASC research is to establish feasible synthetic strategies for the preparation high-performance catalysts, achieve an in-depth understanding active-site structures mechanisms, develop practical with industrial value. This Perspective describes up-to-date development related such dual-atom-site (DASCs) nano-single-atom-site (NSASCs), analyzes current challenges encountered by these applications, proposes their possible future path.

Language: Английский

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Theoretical insights into single-atom catalysts

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(22), P. 8156 - 8178

Published: Jan. 1, 2020

Single-atom catalysts (SACs) with atomically dispersed metals have emerged as a new class of heterogeneous and attracted considerable interest because they offer 100% metal atom utilization show excellent catalytic behavior compared traditionally supported nano-particles. However, it is challenging to explore the active sites mechanisms SACs through common characterization methods due isolated single atoms. Therefore, employing theoretical calculations determine nature SACs' reaction particularly meaningful. This paper describes by summarizing diverse applications properties SACs, which starts from computational simulation on couple important SACs. Then distinctive fundamental are discussed. At last, challenges future perspectives for outlined.

Language: Английский

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Two-dimensional MXene-based and MXene-derived photocatalysts: Recent developments and perspectives

Chemical Engineering Journal, Journal Year: 2020, Volume and Issue: 409, P. 128099 - 128099

Published: Dec. 16, 2020

Language: Английский

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