文献类型：期刊文献

英文题名：Strain Engineering of High-Entropy Oxides Enriches Highly Active Lattice Oxygen for Electrocatalytic Water Oxidation

作者：Wang, Jingyu[1];Zhang, Jiahao[1];Yu, Haifeng[1];Chen, Ling[1];Jiang, Hao[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：6

期号：5

起止页码：1739

外文期刊名：ACS MATERIALS LETTERS

收录：;EI(收录号：20241515870994);WOS:【SCI-EXPANDED(收录号:WOS:001195947700001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 22208102), Shanghai Pilot Program for Basic Research (No. 22TQ1400100-13), the Chenguang Program of Shanghai Education Development Foundation and Shanghai Municipal Education Commission (No. 22CGA30), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Electrolysis - Entropy - Ion exchange membranes - Oxygen - Reaction kinetics

摘要：Developing novel high-entropy oxide electrocatalysts for oxygen evolution is a promising strategy to accelerate the alkaline water electrolysis kinetics by optimizing the reaction paths. Herein, we demonstrate a high-strain senary (FeCoNiCrMnCu)(3)O-4 electrocatalyst with remarkably increased highly active lattice oxygen, which follows the lattice-oxygen-mediated mechanism instead of the traditional adsorbate-evolution mechanism for oxygen evolution reaction (OER). A supersmall overpotential of 241.4 mV is required to obtain 10 mA cm(-2) and a considerable current retention rate of 94.9% is attained after continuously operating for 72 h. The oxygen diffusion coefficient is 1.97 x 10(-14) cm(2) s(-1), 5.6 times larger than the (FeCoNi)(3)O-4, ensuring the rapid replenishment during water oxidation. The OER activity surpasses those of most of the reported spinel oxide electrocatalysts. More impressively, the assembled anion exchange membrane water electrolyzer can deliver an industrial-level current density of 1.0 A cm(-2) under the cell voltage of 1.79 V, exhibiting an attractive application potential.