Self‐Supported Electrocatalysts for Practical Water Electrolysis

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(39)

Published: Sept. 1, 2021

Abstract Over the years, significant advances have been made to boost efficiency of water splitting by carefully designing economic electrocatalysts with augmented conductivity, more accessible active sites, and high intrinsic activity in laboratory test conditions. However, it remains a challenge develop earth‐abundant catalysts that can satisfy demands practical electrolysis, is, outstanding all‐pH electrolyte capacity, direct seawater ability, exceptional performance for overall splitting, superior large‐current‐density activity, robust long‐term durability. In this context, considering features increased species loading, rapid charge, mass transfer, strong affinity between catalytic components substrates, easily‐controlled wettability, as well as, enhanced bifunctional performance, self‐supported are presently projected be most suitable contenders massive scale hydrogen generation. review, comprehensive introduction design fabrication an emphasis on deposited nanostructured catalysts, selection various methods provided. Thereafter, recent development promising applications is reviewed from aforementioned aspects. Finally, brief conclusion delivered challenges perspectives relating promotion sustainable large‐scale production discussed.

Language: Английский

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Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(9), P. 6257 - 6358

Published: March 21, 2023

The oxygen evolution reaction (OER) and reduction (ORR) are core steps of various energy conversion storage systems. However, their sluggish kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, complexity catalyst–electrolyte interface makes a comprehensive understanding intrinsic mechanisms challenging. Fortunately, recent advances in situ/operando characterization techniques have facilitated kinetic monitoring under conditions. Here we provide selected highlights mechanistic studies with main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate basic conditions), followed by brief outlook molecular catalysts. Key sections this review focused determination true active species, identification sites, reactive intermediates. For in-depth insights into above factors, short overview metrics accurate characterizations is provided. A combination obtained time-resolved information reliable activity data will then guide rational design new Strategies such as optimizing restructuring process well overcoming adsorption-energy scaling relations be discussed. Finally, pending current challenges prospects toward development homogeneous presented.

Language: Английский

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Comprehensive Understandings into Complete Reconstruction of Precatalysts: Synthesis, Applications, and Characterizations

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(32)

Published: May 29, 2021

Reconstruction induced by external environment (such as applied voltage bias and test electrolytes) changes catalyst component catalytic behaviors. Investigations of complete reconstruction in energy conversion recently receive intensive attention, which promote the targeted design top-performance materials with maximum utilization good stability. However, advantages reconstruction, its strategies, extensive applications have not achieved profound understandings summaries it deserves. Here, this review systematically summarizes several important advances for first time, includes 1) fundamental characteristics completely reconstructed catalysts, their principles, 2) types reconstruction-involved precatalysts oxygen evolution reaction catalysis wide pH solution, origins limited degree well strategies/principles toward 3) novel material synthesis other electrocatalysis fields, 4) advanced situ/operando or multiangle/level characterization techniques to capture dynamic processes real contributors. Finally, existing major challenges unexplored/unsolved issues on studying chemistry are summarized, an outlook further development is briefly proposed. This will arouse attention diverse fields.

Language: Английский

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Oxygen-evolving catalytic atoms on metal carbides

Nature Materials, Journal Year: 2021, Volume and Issue: 20(9), P. 1240 - 1247

Published: May 31, 2021

Language: Английский

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A review on NiFe-based electrocatalysts for efficient alkaline oxygen evolution reaction

Journal of Power Sources, Journal Year: 2019, Volume and Issue: 448, P. 227375 - 227375

Published: Nov. 13, 2019

Language: Английский

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