退火调控(FeCoNiCuZn)O高熵氧化物析氧反应催化性能  

Annealing Regulation of the Oxygen Evolution Reaction Catalytic Performance of(FeCoNiCuZn)O High-entropy Oxide

作　　者：石佳玉 邓海燕 翚新凤 覃雅婷 劳远侠 Shi Jiayu;Deng Haiyan;Hui Xinfeng;Qin Yating;Lao Yuanxia(Nanning Normal University,Guangxi,530001)

机构地区：[1]南宁师范大学,广西530001

出　　处：《当代化工研究》2025年第6期38-40,共3页Modern Chemical Research

基　　金：2024年广西重点研发计划项目“铁路货车带锈涂装多功能水性涂料体系开发”(项目编号:桂科AB24010253);2022年广西高等学校千名中青年骨干教师培育计划(第五期)。

摘　　要：高熵氧化物(High-entropy Oxide,HEO)因多功能可调性和高稳定性成为电解水阳极析氧反应(Oxygen Evolution Reaction,OER)催化剂的热门候选,但其催化活性仍需提升。通过溶胶-凝胶法制备(FeCoNiCuZn)O催化剂,探讨退火温度对其结构和性能的影响。结果显示,随退火温度降低,试样结晶度下降并出现非晶相。在1 M KOH中,230℃退火样(HEO-230℃)在10 mA·cm^(-2)电流密度下表现出最优催化活性和较好稳定性。双层电容和阻抗测试表明,其优异性能源于非晶相带来的更多活性位点和更高电子转移速率。High-entropy oxide(HEO)have become promising candidates for OER catalysts in water electrolysis anodes due to their tunable multifunctionality and high stability,but their catalytic activity still needs improvement.(FeCoNiCuZn)O catalysts were prepared via the sol-gel method to investigate the effects of annealing temperature on their structure and performance.The results show that as the annealing temperature decreases,the crystallinity of the samples decreases,and an amorphous phase emerges.In 1 M KOH,the sample annealed at 230℃(HEO-230℃)exhibited the best catalytic activity at a current density of 10 mA·cm^(-2),along with good stability.Double-layer capacitance and impedance tests revealed that its superior performance is attributed to the amorphous phase,which provides more active sites and enhances electron transfer rates.

关 键 词：高熵氧化物 非晶 电解水 OER反应 退火 

分 类 号：TQ3[化学工程]