Core-shell graphene@amorphous carbon composites supported platinum catalysts for oxygen reduction reaction

doi:10.1016/S1872-2067(14)60211-4

Abstract

Abstract:

A core-shell graphene nanosheets (GNS) and amorphous carbon composite (GNS@a-C) was prepared by a chlorination method and used as a highly efficient catalyst support for oxygen reduction reaction. Herein, GNS as a shell, with excellent conductivity, high surface area, and corrosion resistance, served as a protecting coating to alleviate the degradation of amorphous carbon core. Platinum nanoparticles were homogeneously deposited on the carbon support (Pt/GNS@a-C) and showed a good catalytic activity and a higher electrochemical stability when compared with a commercial Pt/C catalyst. The mass activity of Pt/GNS@a-C catalyst was 0.121 A/mg, which was almost twice as high as that of Pt/C (0.064 A/mg). Moreover, Pt/GNS@a-C retained 51% of its initial electrochemical specific area after 4000 operating cycles when compared with Pt/C (33%). Thus, the prepared catalyst featured excellent electrochemical stability, showing promise for application in polymer electrolyte membrane fuel cells.

Key words: Low-temperature fuel cell, Support, Core-shell structure, Oxygen reduction reaction

Hui Wu, Tao Peng, Zongkui Kou, Jian Zhang, Kun Cheng, Daping He, Mu Pan, Shichun Mu. Core-shell graphene@amorphous carbon composites supported platinum catalysts for oxygen reduction reaction[J]. Chinese Journal of Catalysis, 2015, 36(4): 490-495.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(14)60211-4

https://www.cjcatal.com/EN/Y2015/V36/I4/490

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