Surface Oxidation of Single-walled-carbon-nanotubes with Enhanced Oxygen Electroreduction Activity and Selectivity  

作　　者：CUI Ya-Qi XU Jiao-Xing WANG Mei-Lin GUAN Lun-Hui 崔亚琪;许交兴;王美琳;官轮辉(College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350108,China)

机构地区：[1]College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China [2]CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350108,China

出　　处：《Chinese Journal of Structural Chemistry》2021年第5期533-539,527,共8页结构化学（英文）

基　　金：Supported by the Science and Technology Planning Project of Fujian Province(2018J01023);the STS Project of Fujian Province(2018T 3024)。

摘　　要：Electrochemical oxygen reduction reaction(ORR) with 2-electron process is an alternative for decentralized H_(2)O_(2) production, but it remains high challenging to develop highly active and selective catalysts for this process. In this work, we present a selective and efficient nonprecious electrocatalyst, prepared through an easily scalable mild oxidation of single-walled carbon nanotubes(SWNTs) with different oxidative acids including sulfur acid, nitride acid and mixed sulfuric/nitric acids, respectively. The high-degree oxidized SWNTs treated by mixed acids exhibit the highest activity and selectivity of electroreduction of oxygen to synthesize H_(2)O_(2) at low overpotential in alkaline and neutral media. Spectroscopic characterizations suggested that the C–O is vital for catalyzing 2-electron ORR, providing an insightful understanding of defected carbon surface as the active catalytic sites for 2-electron ORR.

关 键 词：ELECTROCATALYSTS hydrogen peroxide production oxygen reduction reaction 

分 类 号：TQ123.6[化学工程—无机化工] TQ426