能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 60-67.DOI: 10.1016/j.jechem.2018.12.021

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Controllable active sites and facile synthesis of cobalt nanoparticle embedded in nitrogen and sulfur co-doped carbon nanotubes as efficient bifunctional electrocatalysts for oxygen reduction and evolution reactions

Taeseob Oh, Kwanwoo Kim, Jooheon Kim   

  1. School of Chemical Engineering & Materials Science, Chung-Ang University, Seoul 156-756, Republic of Korea
  • 收稿日期:2018-09-28 修回日期:2018-12-19 出版日期:2019-11-15 发布日期:2020-12-18
  • 通讯作者: Jooheon Kim, jooheonkim@cau.ac.kr
  • 基金资助:
    This work was supported by the National Science Foundation for Distinguished Young Scholars (No. 21525419), the National Natural Science Foundation of China (No. 21474054), and the National Key Research and Development Program of China (No. 2016YFA0202503).

Controllable active sites and facile synthesis of cobalt nanoparticle embedded in nitrogen and sulfur co-doped carbon nanotubes as efficient bifunctional electrocatalysts for oxygen reduction and evolution reactions

Taeseob Oh, Kwanwoo Kim, Jooheon Kim   

  1. School of Chemical Engineering & Materials Science, Chung-Ang University, Seoul 156-756, Republic of Korea
  • Received:2018-09-28 Revised:2018-12-19 Online:2019-11-15 Published:2020-12-18
  • Contact: Jooheon Kim, jooheonkim@cau.ac.kr
  • Supported by:
    This work was supported by the National Science Foundation for Distinguished Young Scholars (No. 21525419), the National Natural Science Foundation of China (No. 21474054), and the National Key Research and Development Program of China (No. 2016YFA0202503).

摘要: Development of efficient and promising bifunctional electrocatalysts for oxygen reduction and evolution reactions is desirable. Herein, cobalt nanoparticles embedded in nitrogen and sulfur co-doped carbon nanotubes (Co@NSCNT) were prepared by a facile pyrolytic treatment. The cobalt nanoparticles and codoping of nitrogen and sulfur can improve the electron donor-acceptor characteristics of the carbon nanotubes and provide more active sites for catalytic oxygen reduction and evolution reactions. The prepared Co@NSCNT, annealed at 900℃, showed excellent electrocatalytic performance and better durability than commercial platinum catalysts. Additionally, Co@NSCNT-900 catalysts exhibited comparable onset potentials and Tafel slopes to ruthenium oxide. Overall, Co@NSCNT showed high activity and improved durability for both oxygen evolution and reduction reactions.

关键词: Oxygen reduction reaction, Oxygen evolution reaction, Nonprecious metal catalyst, Nitrogen and sulfur co-doping, Encapsulated structure

Abstract: Development of efficient and promising bifunctional electrocatalysts for oxygen reduction and evolution reactions is desirable. Herein, cobalt nanoparticles embedded in nitrogen and sulfur co-doped carbon nanotubes (Co@NSCNT) were prepared by a facile pyrolytic treatment. The cobalt nanoparticles and codoping of nitrogen and sulfur can improve the electron donor-acceptor characteristics of the carbon nanotubes and provide more active sites for catalytic oxygen reduction and evolution reactions. The prepared Co@NSCNT, annealed at 900℃, showed excellent electrocatalytic performance and better durability than commercial platinum catalysts. Additionally, Co@NSCNT-900 catalysts exhibited comparable onset potentials and Tafel slopes to ruthenium oxide. Overall, Co@NSCNT showed high activity and improved durability for both oxygen evolution and reduction reactions.

Key words: Oxygen reduction reaction, Oxygen evolution reaction, Nonprecious metal catalyst, Nitrogen and sulfur co-doping, Encapsulated structure