Co/N掺杂多孔碳球电催化合成H_(2)O_(2)  

Co/N-doped porous carbon spheres for H_(2)O_(2) electrosynthesis

作　　者：雷强 唐志红[1] LEI Qiang;TANG Zhihong(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,)

机构地区：[1]上海理工大学材料与化学学院,上海200093

出　　处：《有色金属材料与工程》2024年第6期53-59,共7页Nonferrous Metal Materials and Engineering

基　　金：上海市地方能力建设项目(20060502200)。

摘　　要：以葡萄糖制备的多孔碳(porous carbon,PC)球为基体,采用旋蒸热解法制备了Co/N掺杂多孔PC(PC-CoN),通过进一步氧化制备了富含氧基团的PC-CoN(PC-CoN-O),并探究其氧还原反应(oxidation reduction reaction,ORR)性能。结构表征显示:PC-CoN-O具有较高的比表面积(703.95 m^(2)/g)和丰富的孔径,利于提高传质效率;进一步分析发现,催化剂富含氧基团,氧的原子分数高达23.88%,且Co与N形成Co-N基团。性能分析显示,含氧基团与Co-N的协同作用有利于ORR向二电子(2e~-)方向进行,且电子转移数(n)为2.52,环电流极限密度为0.4 mA/cm^(2),H_(2)O_(2)的选择性高达65.00%。Taking porous carbon(PC)spheres prepared from glucose as the matrix,Co/N-doped porous carbon sphere catalyst(PC-CoN)was prepared by rotary evaporation pyrolysis method.Then,the PC-CoN rich in oxygen groups(PC-CoN-O)was prepared by further oxidation,and their oxygen reduction reaction(ORR)performances were explored.Structural characterization showed that PC-CoN-O present a high specific surface area(703.95 m^(2)/g)and abundant pore size,which was conducive to improving the mass transfer efficiency.Further analysis showed that the catalyst owned rich oxygen groups with oxygen atom fraction as high as 23.88%and the formation of Co-N groups.The results showed that the synergistic effect of oxygen groups and Co-N was beneficial to the ORR reaction in the direction of two electrons(2e with the electron transfer number(n)of 2.52,and the limiting density of the ring current of 0.4 mA/cm^(2),and the selectivity of H_(2)O_(2) up to 65.00%,respectively.

关 键 词：多孔碳球 含氧基团 氧还原反应 H_(2)O_(2) 

分 类 号：TQ151[化学工程—电化学工业]