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.
作者
崔亚琪
许交兴
王美琳
官轮辉
CUI Ya-Qi;XU Jiao-Xing;WANG Mei-Lin;GUAN Lun-Hui(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)
基金
Supported by the Science and Technology Planning Project of Fujian Province(2018J01023)
the STS Project of Fujian Province(2018T 3024)。
