无机材料学报2023，Vol.38Issue(11)：1309-1315,中插6,8.DOI:10.15541/jim20230277
铁氮共掺杂介孔碳材料的简易制备及其氧还原反应催化性能
Iron-nitrogen-codoped Mesoporous Carbon:Facile Synthesis and Catalytic Performance of Oxygen Reduction Reaction
摘要
Abstract
Oxygen reduction reaction(ORR)is an important electrochemical reaction process at the cathode of fuel cell,but its spontaneous reaction process is slow,and its catalysts,though efficient in catalyzing the ORR reaction,are facing problems of expensive price,complicated synthesis process,and polluting environment.Therefore,it is of great significance to explore the method of synthesizing a simple and environmentally friendly catalyst for the preparation of ORR catalysts.Fe-N co-doped mesoporous carbon substrate(Fe-N/MC)is a kind of non-precious metal catalysts for oxygen reduction reaction with great application value.In this work,mesoporous carbon substrate(MCM)was obtained by high-temperature carbonization of small molecule precursors in a semi-closed system in a muffle furnace,and then Fe-N co-doped mesoporous carbon substrate(Fe-N/MCMT)was prepared by mixing the obtained MCM with iron salts in a tube furnace at a high temperature.This method only needs simple pyrolysis conditions,requiring no template agents and toxic substances such as NH3 and HF.MCM is beneficial to enhance the hydrophilicity and coordination ability of the mesoporous carbon substrate surface due to its high element contents of nitrogen and oxygen.Fe-N/MCMT,prepared by MCM and iron salts,contains abundant and catalytic ORR Fe-Nx active sites with onset potential and half-wave potential of 0.941 and 0.831 V(vs RHE),respectively,which are 34 and 16 mV more positive than those of commercial Pt/C catalyst,respectively.ORR can be divided into two-electron or four-electron type according to the reaction process,and the transfer electron numbers of Fe-N/MCMT and Pt/C are 3.77 and 3.91,respectively,indicating a four-electron reaction process.关键词
铁氮共掺杂介孔碳/氧还原反应/半封闭体系/催化剂Key words
iron-nitrogen co-doped mesoporous carbon/oxygen reduction reaction/semi-containment system/catalyst分类
信息技术与安全科学引用本文复制引用
杨代辉,孙甜,田合鑫,史晓斐,马东伟..铁氮共掺杂介孔碳材料的简易制备及其氧还原反应催化性能[J].无机材料学报,2023,38(11):1309-1315,中插6,8.基金项目
南昌工学院校级基金(NGKJ-22-07)School Foundation of Nanchang Institute of Science and Technology(NGKJ-22-07) （NGKJ-22-07）
