电化学（中英文）2025，Vol.31Issue(7)：27-36,10.DOI:10.61558/2993-074X.3549
离子液体增强质子转移并促进中性析氧反应
Ionic Liquid Enhanced Proton Transfer for Neutral Oxygen Evolution Reaction
摘要
Abstract
The development of highly active catalyst in pH-neutral media for oxygen evolution reaction(OER)is critical in the field of renewable energy storage and conversion.Nevertheless,the slow kinetics of proton-coupled electron transfer(PCET)hinders the overall OER efficiency.Herein,we report an ionic liquid(IL)modified CoSn(OH)6 nanocubes(denoted as CoS-n(OH)6-IL),which could be prepared through a facile strategy.The modified IL would not change the structural character-istics of CoSn(OH)6,but could effectively regulate the local proton activity near the active sites.The CoSn(OH)6-IL exhibited higher intrinsic OER performances than the pristine CoSn(OH)6 in neutral media.For example,the current density of CoS-n(OH)6-IL at 1.8 V versus reversible hydrogen electrode(RHE)was about 4 times higher than that of CoSn(OH)6.According to the pH-dependent kinetic investigations,operando electrochemical impedance spectroscopic,chemical probe tests,and deuterium kinetic isotope effects,the interfacial layer of IL could be utilized as a proton transfer mediator to promote the proton transfer,which enhances the surface coverage of OER intermediates and reduces the activation barrier.Consequent-ly,the sluggish OER kinetics would be efficiently accelerated.This study provides a facile and effective strategy to facilitate the PCET processes and is beneficial to guide the rational design of OER electrocatalysts.关键词
电催化/析氧反应/离子液体/质子转移/CoSn(OH)6立方体Key words
Electrocatalysis/Oxygen evolution reaction/Ionic liquid/Proton transfer/CoSn(OH)6 nanocube引用本文复制引用
陈明星,刘念,杜子翯,齐静,曹睿..离子液体增强质子转移并促进中性析氧反应[J].电化学（中英文）,2025,31(7):27-36,10.基金项目
This work was supported by the National Natural Science Foundation of China(22209040,22202063). （22209040,22202063）
