Surface engineering on MnO2 nanorods by La single atoms to accelerate oxygen reduction kinetics

作     者：Zhang-Long He Liu-Qi Wang Min Jiang Jia-Nan Xie Shan Liu Jin-Can Ren Rui Sun Wen-Bin Lv Wei-Bin Guo Yu-Ling Liu Bing Li Qi Liu Hao He 

作者机构：School of Materials Science and EngineeringChangsha University of Science and Technology School of Materials Science and EngineeringNanjingUniversity of Science and Technology School of Materials Science and EngineeringShanghai JiaoTong University Department of PhysicsCity University of Hong Kong 

出 版 物：《Rare Metals》 (稀有金属(英文版))

年 卷 期：2024年第43卷第9期

页      面：4302-4311页

核心收录：

学科分类：0819[工学-矿业工程] 0808[工学-电气工程] 081705[工学-工业催化] 07[理学] 08[工学] 070205[理学-凝聚态物理] 070203[理学-原子与分子物理] 0806[工学-冶金工程] 080103[工学-流体力学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0714[理学-统计学（可授理学、经济学学位）] 0703[理学-化学] 0701[理学-数学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financially supported by the Scientific Research Fund of Hunan Provincial Education Department (No. 21B0289) Changsha Municipal Science and Technology Projects (No. 2022cskj006) 

主　　题：Electron injection Metal–air batteries Oxygen reduction reaction Single atoms Surface engineering 

摘      要：Surface engineering,which modulates the electronic structure and adsorption/desorption properties of electrocatalysts,is one of the key strategies for improving the catalytic ***,we demonstrate a facile solid-phase reaction for surface engineering of MnO2to boost the oxygen reduction *** reaction with surface hydroxy groups,La single atoms with loading amount up to 2.7 wt%are anchored onto *** surface engineering,the oxygen reduction reaction （ORR） kinetics is significantly improved with the half-wave potential from 0.70 to 0.84 V,the number of transferred electrons from 2.5 to 3.9 and the limiting current density from 4.8 to 6.0 mA·*** addition,the catalyst delivers superior discharge performance in both alkaline and neutral metal–air *** functional theory （DFT） calculations reveal that atomic La modulates the surface electronic configuration of MnO2,reduces its d-band center and thus lowers the OOH*and O*reaction energy *** work provides a new route for rational design of highly active electrocatalyst and holds great potential for application in various catalytic reactions.