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Article Navigation >  Green Energy&Environment  > 2017  >  2(1): 23-29
Jun Yang, Laiquan Li, Hong Yu, Hongbo Geng, Chengchao Li, Xiaochen Dong. Co/N–C nanotubes with increased coupling sites by space-confined pyrolysis for high electrocatalytic activity. Green Energy&Environment, 2017, 2(1): 23-29. doi: 10.1016/j.gee.2016.11.002
Citation: Jun Yang, Laiquan Li, Hong Yu, Hongbo Geng, Chengchao Li, Xiaochen Dong. Co/N–C nanotubes with increased coupling sites by space-confined pyrolysis for high electrocatalytic activity. Green Energy&Environment, 2017, 2(1): 23-29. doi: 10.1016/j.gee.2016.11.002
shu

Co/N–C nanotubes with increased coupling sites by space-confined pyrolysis for high electrocatalytic activity

doi: 10.1016/j.gee.2016.11.002
  • a.

    Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China

  • b.

    School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China

More Information
  • Corresponding author: E-mail address: licc@gdut.edu.cn (Chengchao Li); E-mail address: iamxcdong@njtech.edu.cn (Xiaochen Dong)
  • Received date 16 September 2016, Accepted date 03 November 2016, RevRecd date 02 November 2016, Available online 10 November 2016, Publish date 31 January 2017,
    Abstract
  • Searching low cost and non-precious metal catalysts for high-performance oxygen reduction reaction is highly desired. Herein, Co nanoparticles embedded in nitrogen-doped carbon (Co/N–C) nanotubes with internal void space are successfully synthesized by space-confined pyrolysis, which effectively improve the cobalt loading content and restrict the encapsulated particles down to nanometer. Different from the typical conformal carbon encapsulation, the resulting Co/N–C nanotubes possess more cobalt nanoparticles embedded in the nanotubes, which can provide more coupling sites and active sites in the oxygen reduction reaction (ORR). Moreover, the one-dimensional and porous structure provides a high surface area and a fast electron transfer pathway for the ORR. And the Co/N–C electrode presents excellent electrocatalytic ORR activity in terms of low onset potential (30 mV lower than that of Pt/C), small Tafel slop (45.5 mV dec −1) and good durability (88.5% retention after 10,000 s).

     

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