电化学（中英文）2025，Vol.31Issue(9)：56-68,13.DOI:10.61558/2993-074X.3577
协同硼掺杂显著提升Co-N-C催化剂的氧还原反应活性
Significantly Enhanced Oxygen Reduction Reaction Activity in Co-N-C Catalysts through Synergistic Boron Doping
摘要
Abstract
The weak adsorption energy of oxygen-containing intermediates on Co center leads to a considerable performance dis-parity between Co-N-C and costly Pt benchmark in catalyzing oxygen reduction reaction(ORR).In this work,we strategi-cally engineer the active site structure of Co-N-C via B substitution,which is accomplished by the pyrolysis of ammonium borate.During this process,the in-situ generated NH 3 gas plays a critical role in creating surface defects and boron atoms substituting nitrogen atoms in the carbon structure.The well-designed CoB1N3 active site endows Co with higher charge density and stronger adsorption energy toward oxygen species,potentially accelerating ORR kinetics.As expected,the resulting Co-B/N-C catalyst exhibited superior ORR performance over Co-N-C counterpart,with 40 mV,and fivefold en-hancement in half-wave potential and turnover frequency(TOF).More importantly,the excellent ORR performance could be translated into membrane electrode assembly(MEA)in a fuel cell test,delivering an impressive peak power density of 824 mW·cm-2,which is currently the best among Co-based catalysts under the same conditions.This work not only demon-strates an effective method for designing advanced catalysts,but also affords a highly promising non-precious metal ORR electrocatalyst for fuel cell applications.关键词
氧还原反应/质子交换膜燃料电池/单原子催化剂/Co-N-C/硼掺杂Key words
Oxygen reduction reaction/Proton exchange membrane fuel cell/Single-atom catalyst/Co-N-C/Boron doping引用本文复制引用
兰畅,刘长鹏,邢巍,柏景森,关欣,王烁,张楠淑,程雨晴,陶金晶,楚宇逸,肖梅玲..协同硼掺杂显著提升Co-N-C催化剂的氧还原反应活性[J].电化学（中英文）,2025,31(9):56-68,13.基金项目
Authors wish to thank the National Key Re-search and Development Program of China(2022YFB4004100),National Natural Science Foun-dation of China(22272161,22179126),the Jilin Province Science and Technology Development Program(YDZJ202202CXJD011,20240101019JC),Ji-lin Province major science and technology project(222648GX0105103875)for financial supports.The Shanghai Synchrotron Radiation Facility for conduct-ing the X-ray absorption spectroscopy experiments at BL11B station is greatly appreciated. （2022YFB4004100）
