催化作用
钙钛矿(结构)
氧气
氧化物
析氧
复合氧化物
化学
材料科学
化学工程
物理化学
工程类
冶金
有机化学
电极
电化学
作者
Xiaorongjiao,Ying Liu,Xingmao Jiang,Congcong Xing,Xueqiang Qi,Xiang Wang,Andreu Cabot
标识
DOI:10.1016/j.cej.2025.169987
摘要
Efficient and durable oxygen evolution reaction (OER) electrocatalysts are critical for advancing rechargeable zinc-air batteries (ZABs). Here, we present a B-site high-entropy perovskite oxide, La(CrMnFeCoNi)O 3 , synthesized via a rapid microwave-assisted method. The incorporation of five equimolar transition metals at the B-site generates high configurational entropy, stabilizing the perovskite lattice and tuning its electronic structure. This catalyst delivers an overpotential of 316 mV at 10 mA cm −2 , a Tafel slope of 56.83 mV dec −1 , and exceptional durability over 100 h of continuous operation. Mechanistic studies combined with density functional theory calculations reveal that the OER proceeds predominantly through the lattice oxygen mechanism, enabling faster oxygen exchange kinetics than the conventional adsorbate evolution mechanism. Integrated into a ZAB as the air cathode, the material achieves a high peak power density and long-term cycling stability, demonstrating strong promise for next-generation metal-air energy systems. • B-site high-entropy perovskite oxide La(CrMnFeCoNi)O 3 , synthesized via a rapid microwave-assisted method. • Mechanistic studies experiments, in situ measurements, DFT calculations reveal that the OER proceeds predominantly through the lattice oxygen mechanism. • When employed as the air cathode in a ZAB, delivers a high open-circuit voltage, impressive specific capacity, and exceptional cycling stability.
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