Modulated FeWO_(4)electronic structure via P doping on nitrogen-doped porous carbon for improved oxygen reduction activity in zinc-air batteries  

作　　者：Yue Gong Dai-Jie Deng Huan Wang Jian-Chun Wu Lin-Hua Zhu Cheng Yan He-Nan Li Li Xu 

机构地区：[1]Institute for Energy Research,School of Chemistry and Chemical Engineering,School of Materials Science and Engineering,Jiangsu University,Zhenjiang,212013,China [2]College of Chemistry and Chemical Engineering,Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province,Hainan Normal University,Haikou,571158,China [3]School of Mechanical,Medical and Process Engineering,Queensland University of Technology(QUT),Brisbane,QLD,4001,Australia

出　　处：《Rare Metals》2025年第1期240-252,共13页稀有金属(英文版)

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Nos.22178148 and 22278193);a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：As a catalyst of the air cathode in zinc-air batteries,tungstic acid ferrous(FeWO_(4)),a nanoscale transition metal tungstate,shows a broad application prospect in the oxygen reduction reaction(ORR).While FeWO_(4)possesses favorable electrochemical properties and thermodynamic stability,its intrinsic semiconductor characteristics result in a relatively slow electron transfer rate,limiting the ORR catalytic activity.In this work,the electronic structure of FeWO_(4)is significantly modulated by introducing phosphorus(P)atoms with abundant valence electrons.The P doping can adjust the electronic structure of FeWO_(4)and then optimize oxygen-containing intermediates'absorption/desorption efficiency to achieve improved ORR activity.Furthermore,the sodium chloride template is utilized to construct a porous carbon framework for anchoring phosphorus-doped iron tungstate(P-FeWO_(4)/PNC).The porous carbon skeleton provides numerous active sites for the absorption/desorption and redox reactions on the P-FeWO_(4)/PNC surface and serves as mass transport channels for reactants and intermediates.The P-FeWO_(4)/PNC demonstrates ORR performance(E1/2=0.86 V vs.RHE).Furthermore,the zinc-air batteries incorporating the P-FeWO_(4)/PNC composite demonstrate an increased peak power density(172.2 mW·cm^(-2)),high specific capacity(810.1 mAh·g^(-1)),and sustained long-term cycling stability lasting up to 240 h.This research not only contributes to the advancement of cost-effective tungsten-based non-precious metallic ORR catalysts,but also guides their utilization in zinc-air batteries.

关 键 词：Oxygen reduction reaction FeWO_(4) P doping Electronic structure Zinc-air batteries 

分 类 号：O64[理学—物理化学]