能源化学(英文版)

能源化学(英文) ›› 2017, Vol. 26 ›› Issue (6): 1168-1173.DOI: 10.1016/j.jechem.2017.09.004

• Articles • 上一篇    下一篇

Highly efficient iron-nitrogen electrocatalyst derived from covalent organic polymer for oxygen reduction

Jianing Guo, Mengyao Ning, Zhonghua Xiang   

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2017-08-07 修回日期:2017-09-05 出版日期:2017-11-15 发布日期:2017-11-24
  • 通讯作者: Zhonghua Xiang,E-mail address:xiangzh@mail.buct.edu.cn
  • 基金资助:

    This work was supported by the National Key Research and Development Program of China (2017YFA0206500); NSF of China (51502012; 21676020; 21620102007); Beijing Natural Science Foundation (2162032); The Start-up fund for talent introduction of Beijing University of Chemical Technology (buctrc201420; buctrc201714); Talent cultivation of State Key Laboratory of OrganicInorganic Composites; The Fundamental Research Funds for the Central Universities (ZD1502); Distinguished scientist program at BUCT (buctylkxj02) and the "111" project of China (B14004).

Highly efficient iron-nitrogen electrocatalyst derived from covalent organic polymer for oxygen reduction

Jianing Guo, Mengyao Ning, Zhonghua Xiang   

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2017-08-07 Revised:2017-09-05 Online:2017-11-15 Published:2017-11-24
  • Contact: Zhonghua Xiang,E-mail address:xiangzh@mail.buct.edu.cn
  • Supported by:

    This work was supported by the National Key Research and Development Program of China (2017YFA0206500); NSF of China (51502012; 21676020; 21620102007); Beijing Natural Science Foundation (2162032); The Start-up fund for talent introduction of Beijing University of Chemical Technology (buctrc201420; buctrc201714); Talent cultivation of State Key Laboratory of OrganicInorganic Composites; The Fundamental Research Funds for the Central Universities (ZD1502); Distinguished scientist program at BUCT (buctylkxj02) and the "111" project of China (B14004).

摘要： Developing non-precious metal catalyst with high activity, good stability and low cost for electrocatalytic oxygen reduction reaction (ORR) is critical for the wide application of energy conversion system. Here, we developed a cost-effective synthetic strategy via silica assistance to obtain a novel Fe3C/Fe-Nx-C (named as COPBP-PB-Fe-900-SiO2) catalyst with effective active sites of Fe-Nx and Fe3C from the rational design two-dimensional covalent organic polymer (COPBP-PB). The nitrogen-rich COP effectively promotes the formation of active Fe-Nx sites. Additionally, the silica not only can effectively suppress the formation of large Fe-based particles in the catalysts, but also increases the degree of carbonization of the catalyst. The as-prepared COPBP-PB-Fe-900-SiO2 catalyst exhibits high electrocatalytic activity for ORR with a halfwave potential of 0.85 V vs. reversible hydrogen electrode (RHE), showing comparable activity as compared with the commercial Pt/C catalysts in alkaline media. Moreover, this catalyst also shows a high stability with a nearly constant onset potential and half-wave potential after 10,000 cycles. The present work is highly meaningful for developing ORR electrocatalysts toward wide applications.

关键词: Oxygen reduction reaction, Electrocatalyst, Covalent organic frameworks, Nonprecious metal catalysts, Fe-Nx

Abstract: Developing non-precious metal catalyst with high activity, good stability and low cost for electrocatalytic oxygen reduction reaction (ORR) is critical for the wide application of energy conversion system. Here, we developed a cost-effective synthetic strategy via silica assistance to obtain a novel Fe3C/Fe-Nx-C (named as COPBP-PB-Fe-900-SiO2) catalyst with effective active sites of Fe-Nx and Fe3C from the rational design two-dimensional covalent organic polymer (COPBP-PB). The nitrogen-rich COP effectively promotes the formation of active Fe-Nx sites. Additionally, the silica not only can effectively suppress the formation of large Fe-based particles in the catalysts, but also increases the degree of carbonization of the catalyst. The as-prepared COPBP-PB-Fe-900-SiO2 catalyst exhibits high electrocatalytic activity for ORR with a halfwave potential of 0.85 V vs. reversible hydrogen electrode (RHE), showing comparable activity as compared with the commercial Pt/C catalysts in alkaline media. Moreover, this catalyst also shows a high stability with a nearly constant onset potential and half-wave potential after 10,000 cycles. The present work is highly meaningful for developing ORR electrocatalysts toward wide applications.

Key words: Oxygen reduction reaction, Electrocatalyst, Covalent organic frameworks, Nonprecious metal catalysts, Fe-Nx