Citation: Gaopeng Liu, Bin Wang, Li Xu, Penghui Ding, Pengfei Zhang, Jiexiang Xia, Huaming Li, Junchao Qian. Paper-derived cobalt and nitrogen co-doped carbon nanotube@porous carbon as a nonprecious metal electrocatalyst for the oxygen reduction reaction[J]. Chinese Journal of Catalysis, ;2018, 39(4): 790-799. doi: 10.1016/S1872-2067(17)62982-6 shu

Paper-derived cobalt and nitrogen co-doped carbon nanotube@porous carbon as a nonprecious metal electrocatalyst for the oxygen reduction reaction

Gaopeng Liu ^a, ,
Bin Wang ^a ,
Li Xu ^a ,
Penghui Ding ^a ,
Pengfei Zhang ^b,c ,
Jiexiang Xia ^a,b ,
Huaming Li ^a ,
Junchao Qian ^d

a School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
b Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge 37830, USA;
c School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
d Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China

Received Date: 21 November 2017
Revised Date: 23 December 2017

Fund Project: This work was supported by the National Nature Science Foundation of China (21476098, 21471069, 21576123) and International Postdoctoral Exchange Fellowship Program of China Postdoctoral Council (20150060).

The oxygen reduction reaction (ORR) is a vitally important process in fuel cells. The development of high-performance and low-cost ORR electrocatalysts with outstanding stability is essential for the commercialization of the electrochemical energy technology. Herein, we report a facile synthesis of cobalt (Co) and nitrogen (N) co-doped carbon nanotube@porous carbon (Co/N/CNT@PC-800) electrocatalyst through a one-step pyrolysis of waste paper, dicyandiamide, and cobalt(Ⅱ) acetylacetonate. The surface of the hierarchical porous carbon supported a large number of carbon nanotubes (CNTs), which were derived from dicyandiamide through the catalysis of Co. The addition of Co resulted in the formation of a hierarchical micro/mesoporous structure, which was beneficial for the exposure of active sites and rapid transportation of ORR-relevant species (O₂, H⁺, OH^-, and H₂O). The doped N and Co formed more active sites to enhance the ORR activity of the electrocatalyst. The Co/N/CNT@PC-800 material exhibited optimal ORR performance with an onset potential of 0.005 V vs. Ag/AgCl and a half-wave potential of -0.173 V vs. Ag/AgCl. Meanwhile, the electrocatalyst showed an excellent methanol tolerance and a long-term operational durability than that of Pt/C, as well as a quasi-four-electron reaction pathway. The low-cost and simple synthesis approach makes the Co/N/CNT@PC-800 a prospective electrocatalyst for the ORR. Furthermore, this work provides an alternative approach for exploring the use of biomass-derived electrocatalysts for renewable energy applications.
- Oxygen reduction reaction,
- Waste paper,
- Biomass,
- Porous carbon,
- Cobalt
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