Preparation of self-nitrogen-doped porous carbon nanofibers and their supported PtPd alloy catalysts for oxygen reduction reaction

There are many types of cathodic oxygen reduction catalysts for proton exchange membrane fuel cell (PEMFC). Among them, Pt-based catalysts are most likely to be industrialized because of their incomparable high activity. However, most of the Pt-based catalysts have not reached the maximum activity a...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2020, Vol.24 (1), p.195-206
Main Authors: Li, Zhenqin, Deng, Xiaoting, Zhou, Haikun, Xuan, Wei, Xie, Zhiyong, Liu, Feng
Format: Article
Language:English
Subjects:
Analytical Chemistry
Carbon fibers
Catalysts
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemical analysis
Electrochemistry
Electronic structure
Energy Storage
Nanoalloys
Nanofibers
Nanoparticles
Nitrogen
Original Paper
Oxygen reduction reactions
Physical Chemistry
Proton exchange membrane fuel cells
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Summary:There are many types of cathodic oxygen reduction catalysts for proton exchange membrane fuel cell (PEMFC). Among them, Pt-based catalysts are most likely to be industrialized because of their incomparable high activity. However, most of the Pt-based catalysts have not reached the maximum activity and stability. Herein, porous carbon nanofibers (p-CNF) with self-nitrogen-doped as catalyst supports were successfully prepared by the method of electrospinning. After functionalization, the functionalized porous carbon nanofibers (f-p-CNF) were loaded with PtPd alloy nanoparticles to obtain the catalyst (Pt 0.66 Pd 0.33 /f-p-CNF), which has excellent electrochemical performance. Its specific activities (SA) and Pt mass activities (Pt MA) are 1.73 and 1.86 times of the commercial JM 20% Pt/C (JM20), respectively. The results can be attributed to the porous structure of nanofibers, which not only facilitate the transmission of gas-liquid and electron but also increase the exposure of active sites. And the doped nitrogen of fibers may regulate the electronic structure of the metal active substance to increase the activity. This work provides catalyst with novel structure which could enable PEMFCs to be more efficient in operation.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-019-04474-4