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Efficiency and durability: the rise of high-entropy oxides for water electrolysis
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DOI：10.1016/j.jechem.2026.08.003.png)
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Abstract
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Water electrolysis for hydrogen production represents a green and efficient technology with considerable potential. High-entropy oxides (HEOs) have recently attracted attention as promising substitutes for noble-metal-based catalysts, due to their entropy-driven stabilization, highly tunable multicomponent compositions, abundant active sites, and relatively low preparation costs. In recent years, HEOs have attracted increasing attention within the field of water electrolysis. However, their practical application remains constrained by challenges related to synthesis route selection, structural regulation, and large-scale industrial implementation. This review systematically summarizes recent advances in HEOs for water electrolysis. It introduces fundamental concepts and intrinsic properties of HEOs, elucidating their advantages for water electrolysis applications. A detailed presentation of alternative synthetic routes is given, along with critical comparisons of their respective advantages and limitations. Furthermore, recent progress in applying HEOs to both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is discussed. Lastly, the critical issues and future research priorities for HEO-based electrocatalysts are pinpointed, aiming to offer valuable insights and guidance to promote their practical application in water electrolysis.
Keywords:
High-entropy oxides
Water electrolysis
Hydrogen evolution reaction
Oxygen evolution reaction
Electrocatalyst
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14.9
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6.0K
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4.5W
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