电化学（中英文）2025，Vol.31Issue(9)：46-55,10.DOI:10.61558/2993-074X.3566
局域电场耦合Cl-固定策略提升海水氧还原反应性能
Local Electric Fields Coupled with Cl-Fixation Strategy for Improving Seawater Oxygen Reduction Reaction Performance
摘要
Abstract
Development of robust electrocatalyst for oxygen reduction reaction(ORR)in a seawater electrolyte is the key to realize seawater electrolyte-based zinc-air batteries(SZABs).Herein,constructing a local electric field coupled with chloride ions(Cl—)fixation strategy in dual single-atom catalysts(DSACs)was proposed,and the resultant catalyst delivered consider-able ORR performance in a seawater electrolyte,with a high half-wave potential(E1/2)of 0.868 V and a good maximum power density(Pmax)of 182 mW·cm-2 in the assembled SZABs,much higher than those of the Pt/C catalyst(E1/2:0.846 V;Pmax:150 mW·cm-2).The in-situ characterization and theoretical calculations revealed that the Fe sites have a higher Cl-adsorption affinity than the Co sites,and preferentially adsorbs Cl-in a seawater electrolyte during the ORR process,and thus constructs a low-concentration Cl-local microenvironment through the common-ion exclusion effect,which prevents Cl-adsorption and corrosion in the Co active centers,achieving impressive catalytic stability.In addition,the directional charge movement between Fe and Co atomic pairs establishes a local electric field,optimizing the adsorption energy of Co sites for oxygen-containing intermediates,and further improving the ORR activity.关键词
海水锌空气电池/氧还原反应/局域电场/氯离子固定策略/单原子催化剂Key words
Seawater zinc-air battery/Oxygen reduction reaction/Local electric field/Chloride ion fixation strategy/Sin-gle-atom catalyst引用本文复制引用
刘育荣,梁颖,田新龙,张淼,于彦会,刘亚琳,李静,史晓东,康振烨,吴道雄,饶鹏..局域电场耦合Cl-固定策略提升海水氧还原反应性能[J].电化学（中英文）,2025,31(9):46-55,10.基金项目
This work was supported by the National Nat-ural Science Foundation of China(52164028,52274297),the Start-up Research Foundation of Hain-an University(KYQD(ZR)20008,KYQD(ZR)21125,KYQD(ZR)23169)),Collaborative Innovation Center of Marine Science and Technology of Hainan Uni-versity(XTCX2022HYC14),and Innovative Research Project for Postgraduate Students in Hainan Province(Qhyb2024-95).The numerical computations are per-formed at the Hefei Advanced Computing Center.The authors acknowledge the support for compre-hensive characterizations by Pico Electron Microsco-py Center of Hainan University. （52164028,52274297）
