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Nano Research 2023, 16(7): 9142-9157 https://doi.org/10.1007/s12274-023-5502-8
Review Article | Issue | Published: 02 April 2023

Electrocatalytic water splitting: Mechanism and electrocatalyst design

Show Author's Information Han Wu,§,  Qiaoxian Huang,§,  Yuanyuan Shi,  Jiangwei Chang( ),  Siyu Lu( )
Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China

§ Han Wu and Qiaoxian Huang contributed equally to this work.

Keywords:
mechanism, water splitting, design strategy, operando spectroscopy
Topics:
Electrocatalysis Fuel cells
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Wu H, Huang Q, Shi Y, et al. Electrocatalytic water splitting: Mechanism and electrocatalyst design. Nano Research, 2023, 16(7): 9142-9157. https://doi.org/10.1007/s12274-023-5502-8
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Abstract Full text Electronic supplementary material About this article

Hydrogen energy, a new type of clean and efficient energy, has assumed precedence in decarbonizing and building a sustainable carbon-neutral economy. Recently, hydrogen production from water splitting has seen considerable advancements owing to its advantages such as zero carbon emissions, safety, and high product purity. To overcome the large energy barrier and high cost of water splitting, numerous efficient electrocatalysts have been designed and reported. However, various difficulties in promoting the industrialization of electrocatalytic water splitting remain. Further, as high-performance electrocatalysts that satisfy industrial requirements are urgently needed, a better understanding of water-splitting systems is required. In this paper, the latest progress in water electrolysis is reviewed, and experimental evidence from in situ/operando spectroscopic surveys and computational analyses is summarized to present a mechanistic understanding of hydrogen and oxygen evolution reactions. Furthermore, some promising strategies, including alloying, morphological engineering, interface construction, defect engineering, and strain engineering for designing and synthesizing electrocatalysts are highlighted. We believe that this review will provide a knowledge-guided design in fundamental science and further inspire technical engineering developments for constructing efficient electrocatalysts for water splitting.


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Electronic supplementary material
About this article

Electrocatalytic water splitting: Mechanism and electrocatalyst design

Show Author's information Han Wu,§, Qiaoxian Huang,§, Yuanyuan Shi, Jiangwei Chang( ), Siyu Lu( )
Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China

§ Han Wu and Qiaoxian Huang contributed equally to this work.

Abstract

Hydrogen energy, a new type of clean and efficient energy, has assumed precedence in decarbonizing and building a sustainable carbon-neutral economy. Recently, hydrogen production from water splitting has seen considerable advancements owing to its advantages such as zero carbon emissions, safety, and high product purity. To overcome the large energy barrier and high cost of water splitting, numerous efficient electrocatalysts have been designed and reported. However, various difficulties in promoting the industrialization of electrocatalytic water splitting remain. Further, as high-performance electrocatalysts that satisfy industrial requirements are urgently needed, a better understanding of water-splitting systems is required. In this paper, the latest progress in water electrolysis is reviewed, and experimental evidence from in situ/operando spectroscopic surveys and computational analyses is summarized to present a mechanistic understanding of hydrogen and oxygen evolution reactions. Furthermore, some promising strategies, including alloying, morphological engineering, interface construction, defect engineering, and strain engineering for designing and synthesizing electrocatalysts are highlighted. We believe that this review will provide a knowledge-guided design in fundamental science and further inspire technical engineering developments for constructing efficient electrocatalysts for water splitting.

Keywords: mechanism, water splitting, design strategy, operando spectroscopy

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Publication history
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Acknowledgements

Publication history

Received: 17 December 2022
Revised: 07 January 2023
Accepted: 12 January 2023
Published: 02 April 2023
Issue date: July 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was partly supported by the National Natural Science Foundation of China (Nos. 52202050, 52122308, 21905253, and 51973200), the China Postdoctoral Science Foundation (No. 2022TQ0286), and the Natural Science Foundation of Henan Province (No. 202300410372).

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