Advanced Electrocatalysts with Single-Metal-Atom Active Sites

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 12217 - 12314

Published: Nov. 2, 2020

Electrocatalysts with single metal atoms as active sites have received increasing attention owing to their high atomic utilization efficiency and exotic catalytic activity selectivity. This review aims provide a comprehensive summary on the recent development of such single-atom electrocatalysts (SAECs) for various energy-conversion reactions. The discussion starts an introduction different types SAECs, followed by overview synthetic methodologies control dispersion atomically resolved characterization using state-of-the-art microscopic spectroscopic techniques. In recognition extensive applications electrocatalytic studies are dissected in terms important electrochemical reactions, including hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR), carbon dioxide (CO2RR), nitrogen (NRR). Examples SAECs deliberated each case performance, structure-property relationships, enhancement mechanisms. A perspective is provided at end section about remaining challenges opportunities targeted reaction.

Language: Английский

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Electromagnetic microwave absorption theory and recent achievements in microwave absorbers

Carbon, Journal Year: 2020, Volume and Issue: 168, P. 606 - 623

Published: July 17, 2020

Language: Английский

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Recent advances in transition metal-based electrocatalysts for alkaline hydrogen evolution

Journal of Materials Chemistry A, Journal Year: 2019, Volume and Issue: 7(25), P. 14971 - 15005

Published: Jan. 1, 2019

Transition metal-based electrocatalysts for alkaline hydrogen evolution reaction.

Language: Английский

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Chromium-ruthenium oxide solid solution electrocatalyst for highly efficient oxygen evolution reaction in acidic media

Nature Communications, Journal Year: 2019, Volume and Issue: 10(1)

Published: Jan. 8, 2019

The development of active, acid-stable and low-cost electrocatalysts for oxygen evolution reaction is urgent challenging. Herein we report an Iridium-free low ruthenium-content oxide material (Cr0.6Ru0.4O2) derived from metal-organic framework with remarkable performance in acidic condition. It shows a record overpotential 178 mV at 10 mA cm-2 maintains the excellent throughout h chronopotentiometry test constant current 0.5 M H2SO4 solution. Density functional theory calculations further revealed intrinsic mechanism exceptional performance, highlighting influence chromium promoter on enhancement both activity stability.

Language: Английский

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Single atom electrocatalysts supported on graphene or graphene-like carbons

Chemical Society Reviews, Journal Year: 2019, Volume and Issue: 48(20), P. 5207 - 5241

Published: Jan. 1, 2019

Electrocatalysis plays an essential role in diverse electrochemical energy conversion processes that are vital for improving utilization efficiency and mitigating the aggravating global warming challenge. The noble metals such as platinum generally most frequently used electrocatalysts to drive these reactions facilitate relevant processes. high cost scarcity of materials pose a serious challenge wide-spread adoption sustainability technologies long run, which have motivated considerable efforts searching alternative with reduced loading precious or based entirely on earth-abundant metals. Of particular interest graphene-supported single atom catalysts (G-SACs) integrate merits heterogeneous homogeneous catalysts, activity, selectivity, stability, maximized easy separation from reactants/products. graphene support features large surface area, conductivity excellent (electro)-chemical making it highly attractive substrate supporting various In this review, we highlight recent advancements G-SACs conversion, synthetic strategies identification atomistic structure electrocatalytic applications variety reactions, finally conclude brief prospect future challenges opportunities.

Language: Английский

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Metal–Organic Frameworks Based Electrocatalysts for the Oxygen Reduction Reaction

Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 59(12), P. 4634 - 4650

Published: Sept. 17, 2019

Abstract In view of the clean and sustainable energy, metal–organic frameworks (MOFs) based materials, including pristine MOFs, MOF composites, their derivatives are emerging as unique electrocatalysts for oxygen reduction reaction (ORR). Thanks to tunable compositions diverse structures, efficient MOF‐based materials provide new opportunities accelerate sluggish ORR at cathode in fuel cells metal–air batteries. This Minireview first provides some introduction followed by classification towards ORR. Recent breakthroughs engineering highlighted with an emphasis on synthesis strategy, component, morphology, structure, electrocatalytic performance, mechanism. Finally, current challenges future perspectives also discussed.

Language: Английский

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MOF‐Derived Bifunctional Cu₃P Nanoparticles Coated by a N,P‐Codoped Carbon Shell for Hydrogen Evolution and Oxygen Reduction

Advanced Materials, Journal Year: 2017, Volume and Issue: 30(6)

Published: Dec. 21, 2017

Metal-organic frameworks (MOFs) have recently emerged as a type of uniformly and periodically atom-distributed precursor efficient self-sacrificial template to fabricate hierarchical porous-carbon-related nanostructured functional materials. For the first time, Cu-based MOF, i.e., Cu-NPMOF is used, whose linkers contain nitrogen phosphorus heteroatoms, single prepare novel Cu3 P nanoparticles (NPs) coated by N,P-codoped carbon shell that extended porous matrix with identical uniform N doping (termed P@NPPC) an electrocatalyst. P@NPPC demonstrates outstanding activity for both hydrogen evolution oxygen reduction reaction, representing example P-based bifunctional catalyst energy-conversion reactions. The high performances are ascribed specific surface area, synergistic effects NPs intrinsic activity, protection shell, doped multiheteroatoms. This strategy using diverse MOF structural compositional material create new multifunctional composite/hybrid may expand opportunities explore highly robust non-noble-metal catalysts

Language: Английский

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High-performance fuel cell cathodes exclusively containing atomically dispersed iron active sites

Energy & Environmental Science, Journal Year: 2019, Volume and Issue: 12(8), P. 2548 - 2558

Published: Jan. 1, 2019

Platinum group metal-free (PGM-free) catalysts for the oxygen reduction reaction (ORR) with atomically dispersed FeN₄ sites have emerged as a potential replacement low-PGM in acidic polymer electrolyte fuel cells (PEFCs).

Language: Английский

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MOF-derived yolk-shell Ni@C@ZnO Schottky contact structure for enhanced microwave absorption

Chemical Engineering Journal, Journal Year: 2019, Volume and Issue: 383, P. 123099 - 123099

Published: Oct. 8, 2019

Language: Английский

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Metal organic frameworks derived single atom catalysts for electrocatalytic energy conversion

Nano Research, Journal Year: 2019, Volume and Issue: 12(9), P. 2067 - 2080

Published: March 11, 2019

Language: Английский

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