Bifunctional 3D n-doped porous carbon materials derived from paper towel for oxygen reduction reaction and supercapacitor  

作　　者：Xinyu Gao Xueyan Li Zhuang Kong Guozheng Xiao Ying Zhu 

机构地区：[1]Key Laboratory of Bio-inspired Smart Interracial Science and Technology of Ministry of Education, School of Chemistry, Beihang University. Belting 100191. China [2]Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University. Beijing 100191, China

出　　处：《Science Bulletin》2018年第10期621-628,共8页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51473008,51672019);the National Key Research and Development Program of China(2017YFA0206900);the 111 Project(B14009)

摘　　要：Designing and fabricating cheap and active bifunctional materials is crucial for the development of renewable energy technologies.In this article,three-dimensional nitrogen-doped porous carbon materials(NDPC-X,in which X represents the pyrolysis temperature) were fabricated by simultaneous carbonization and activation of polypyrrole-coated paper towel protected by a silica layer followed by acid etching.The material had a high specific surface area(1,123.40 m^2/g).The as-obtained NDPC-900 displayed outstanding activity as a catalyst for the oxygen reduction reaction(ORR) as well as an electrode with a high specific capacitance in a supercapacitor in an alkaline medium.The NDPC-900 catalyst for the ORR exhibited a more positive reduction peak potential of à0.068 V(vs.Hg|HgCl^2) than that of Pt/C(-0.121 V),as well as better cycling stability and stronger methanol tolerance.Moreover,the NDPC-900 had a high specific capacitance of 379.50 F/g at a current density of 1 A/g,with a retention rate of 94.5% after 10,000 cycles in 6 mol/L KOH electrolyte when used as an electrode in a supercapacitor.All these results were attributed to the effect of a large surface area,which provided electrochemically active sites.This work introduces an effective way to use biomass-derived materials for the synthesis of promising bifunctional carbon material for electrochemical energy conversion and storage devices.Designing and fabricating cheap and active bifunctional materials is crucial for the development of renewable energy technologies.In this article,three-dimensional nitrogen-doped porous carbon materials（NDPC-X,in which X represents the pyrolysis temperature） were fabricated by simultaneous carbonization and activation of polypyrrole-coated paper towel protected by a silica layer followed by acid etching.The material had a high specific surface area（1,123.40 m2/g）.The as-obtained NDPC-900 displayed outstanding activity as a catalyst for the oxygen reduction reaction（ORR） as well as an electrode with a high specific capacitance in a supercapacitor in an alkaline medium.The NDPC-900 catalyst for the ORR exhibited a more positive reduction peak potential of à0.068 V（vs.Hg｜HgCl2） than that of Pt/C（-0.121 V）,as well as better cycling stability and stronger methanol tolerance.Moreover,the NDPC-900 had a high specific capacitance of 379.50 F/g at a current density of 1 A/g,with a retention rate of 94.5% after 10,000 cycles in 6 mol/L KOH electrolyte when used as an electrode in a supercapacitor.All these results were attributed to the effect of a large surface area,which provided electrochemically active sites.This work introduces an effective way to use biomass-derived materials for the synthesis of promising bifunctional carbon material for electrochemical energy conversion and storage devices.

关 键 词：Paper towel Nitrogen-doped carbon Oxygen reduction reaction Supercapacitor 

分 类 号：TM53[电气工程—电器] TQ127.11[化学工程—无机化工]