Issue

Vol. 18 (2026)

High-Entropy Amorphous Catalysts for Water Electrolysis: A New Frontier

https://doi.org/10.1007/s40820-025-01936-5
Gaihong Wang
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
Zhijie Chen
UNSW Water Research Centre, School of Civil and Environmental Engineering, The University New South Wales, Sydney, NSW 2052, Australia
Jinliang Zhu
School of Resources, Environment and Materials, State Key Laboratory of Featured Metal Materials and Life‑Cycle Safety for Composite Structures, Guangxi University, Nanning 530004, People’s Republic of China
Jiangzhou Xie
School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Wei Wei
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
Yi‑Ming Yan
State Key Lab of Organic−Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
Bing‑Jie Ni
UNSW Water Research Centre, School of Civil and Environmental Engineering, The University New South Wales, Sydney, NSW 2052, Australia

Corresponding Author: Bing‑Jie Ni

bingjieni@gmail.com

Nano-Micro Letters, Vol. 18 (2026), Article Number: 77

Abstract

High‐entropy amorphous catalysts (HEACs) integrate multielement synergy with structural disorder, making them promising candidates for water splitting. Their distinctive features—including flexible coordination environments, tunable electronic structures, abundant unsaturated active sites, and dynamic structural reassembly—collectively enhance electrochemical activity and durability under operating conditions. This review summarizes recent advances in HEACs for hydrogen evolution, oxygen evolution, and overall water splitting, highlighting their disorder-driven advantages over crystalline counterparts. Catalytic performance benchmarks are presented, and mechanistic insights are discussed, focusing on how multimetallic synergy, amorphization effect, and in‐situ reconstruction cooperatively regulate reaction pathways. These insights provide guidance for the rational design of next‐generation amorphous high‐entropy electrocatalysts with improved efficiency and durability.


Highlights:
1 This review comprehensively summarizes the recent progress of high-entropy amorphous catalysts for electrochemical water splitting.
2 The unique structural characteristics of high-entropy amorphous materials—such as short-range order, high defect density, and flexible coordination—are discussed in relation to their electrocatalytic advantages.
3 Mechanistic insights into multimetallic synergy, amorphization effect, and in-situ reconstruction are highlighted to guide rational catalyst design.

Keywords

High‐entropy amorphous catalysts Electrocatalysis Water splitting Structural disorder Multimetallic synergy
Wang, Gaihong, Zhijie Chen, Jinliang Zhu, Jiangzhou Xie, Wei Wei, Yi‑Ming Yan, and Bing‑Jie Ni. 2025. “High-Entropy Amorphous Catalysts for Water Electrolysis: A New Frontier”. Nano-Micro Letters 18 (October):77. https://doi.org/10.1007/s40820-025-01936-5.
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