高含量硼氮氧掺杂碳电催化两电子氧还原反应

High Ratios of Boron,Nitride and Oxygen Doped Carbon Electrocatalytic for Two-electron Oxygen Reduction Reactions

以科琴黑(Ketjen black)为C源、尿素(urea)为N源、硼氢化钠(NaBH4)为B源,控制固相合成温度得到不同硼氮氧共掺杂碳材料,低温硼氮氧掺杂碳材料(BNO-KB-550)、低硼氮氧含量的碳材料(BNO-KB)和高硼氮氧含量的碳材料(H-BNO-KB),通扫描电镜(SEM)、N_(2)吸附脱附曲线、粉末X射线衍射(PXRD)、拉曼光谱(Raman)和X射线光电子能谱(XPS)的表征方法对3种催化剂进行了微观结构和化学组成的表征,然后通过旋转环盘电极对材料的电化学性能进行测试。结果表明,程序升温得到的H-BNO-KB具有良好的电催化两电子氧还原(2eORR)性能。

Using Ketjen black as C source,urea as N source,and sodium borohydride(NaBH4)as B source,dif-ferent B,N,O doped C materials were obtained by controlling the solid reaction synthesis temperature.Therefore,three different boron nitrogen and oxygen codoped carbon materials:BNO-KB-550,BNO-KB and H-BNO-KB were obtained.The microstructure and chemical composition of the three catalysts were characterized by SEM,BET,PXRD,Raman,XPS and other characterization methods,and the electrochemical properties of the materials were tested by rotating ring disk electrode.The results show that the H-BNO-KB prepared by temperature pro-grammed process has good electrocatalytic performance of two electron oxygen reduction reaction(2eORR).