Gaihong Wang, Zhijie Chen, Jinliang Zhu, Jiangzhou Xie, Wei Wei, Yi‐Ming Yan, Bing‐Jie Ni
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.