Recent Advances in Design of Electrocatalysts for High‐Current‐Density Water Splitting

Electrochemical water splitting technology for producing “green hydrogen” is important for the global mission of carbon neutrality. Electrocatalysts with decent performance at high current densities play a central role in the industrial implementation of this technology. This field has advanced imme...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2022-04, Vol.34 (16), p.e2108133-n/a
Main Authors: Luo, Yuting, Zhang, Zhiyuan, Chhowalla, Manish, Liu, Bilu
Format: Article
Language:English
Subjects:
Catalysts
Chemical synthesis
Current density
Electrocatalysts
Electron transport
high current densities
hydrogen evolution reaction
Materials science
oxygen evolution reaction
Water splitting
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Summary:Electrochemical water splitting technology for producing “green hydrogen” is important for the global mission of carbon neutrality. Electrocatalysts with decent performance at high current densities play a central role in the industrial implementation of this technology. This field has advanced immensely in recent years, as witnessed by many types of catalysts designed and synthesized toward industriallyrelevant current densities (>200 mA cm–2). By discussing recent advances in this field, several key aspects are summarized that affect the catalytic performance for high‐current‐density electrocatalysis, including dimensionality of catalysts, surface chemistry, electron transport path, morphology, and catalyst‐electrolyte interplay. The multiscale design strategy that considers these aspects comprehensively for developing high‐current‐density electrocatalysts are highlighted. The perspectives on the future directions in this emerging field are also put forward. To achieve global mission of carbon neutrality, green hydrogen production by electrochemical water splitting technology has attracted much attention. Developing efficient electrocatalysts working under industrially required current densities is essential for wide implementation of this technology. This review summarizes progress in design of high‐current‐density catalysts, key aspects determining high‐current‐density performance, multiscale catalyst design strategy, and future directions in this emerging field.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.202108133