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Authors

Can-yun ZHAO, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;
Lin HUANG, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;Kunshan Innovation Institute of Nanjing University, Kunshan 215347, China;
Yong YOU, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;
Ying-fang YAO, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;Kunshan Innovation Institute of Nanjing University, Kunshan 215347, China;
Xiao-gang SU, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;
Hong WAN, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;
Jian-guo LIU, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;Kunshan Innovation Institute of Nanjing University, Kunshan 215347, China;Suzhou High-tech Institute of Nanjing University, Suzhou 215123, China;Follow
Cong-ping WU, College of engineering and Applied sciences, Nanjing University, Nanjing 210093, China;Eco-materials renewable Energy Research Center, Nanjing University, Nanjing 210093, China;Kunshan Innovation Institute of Nanjing University, Kunshan 215347, China;

Corresponding Author

Jian-guo LIU(jianguoliu@nju.edu.cn)

Abstract

Nitrogen-doped carbon materials with iron ions are known as catalytic growth agents for the oxygen reduction reaction (ORR) in fuel cells, but the design and synthesis of high-performance and low-cost catalysts still remain a significant challenge. Herein, we present a cost-effective approach to dispose of MF solid waste as the precursor for the synthesis of MCFes catalyst with the favorable structure features such as the high specific surface area, abundant active sites and suitable pore structure. The results showed that the MCFe-10/10/2 had specific surface area as high as 780.7 m2•g-1 and high efficient catalytic activity comparable to commercial 5% Pt/C catalyst for the ORR in acid media. Furthermore, the influences in the contents of N through heat-treated at NH3 atmosphere were also investigated in detail. It was found that the catalytic activity was sensitive to N type, particularly the ratio of pyridinic-N to total N atoms. The large N contents did not lead to higher ORR activities ofMCFes and NMCFe-10/10/2. While the pyridinic N content improved the onset potential for ORR. Furthermore, iron carbide nanoparticles were well encapsulated in N-doped graphene-like layers, which determined the limiting current density. This judicious transformation of organic-rich waste not only addresses the disposal issue, but also generates valuable functional carbon materials from the discard. The as-synthesized carbon will certainly have greater economic ramifications by creating value added materials from wastes.

Graphical Abstract

Keywords

Proton exchange membrane fuel cell, ORR, FeNx/C, catalyst, waste utilization

Publication Date

2016-04-28

Online Available Date

2016-02-06

Revised Date

2016-01-27

Received Date

2015-12-17

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