期刊
NANO ENERGY
卷 56, 期 -, 页码 524-530出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2018.11.054
关键词
Electrospinning; Graphene; Catalyst; Doping; Oxygen reduction reaction
类别
资金
- National Creative Research Initiative (CRI) Center for Multi-Dimensional Directed Nanoscale Assembly [2015R1A3A2033061]
- Nanomaterial Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016M3A7B4905613]
Pt-based catalysts are suffering from the intrinsic high cost and poor stability for practical use in fuel cells. We develop a free-standing fabric type Pt-free high-performance oxygen reduction reaction (ORR) catalyst, consisting of N, Fe-codoped carbon nanofibers and graphene (N/Fe-CG) hybrids. Electrospinning is used to synthesize the free-standing fabric catalysts. Incorporation of graphene into the nanofiber structure greatly increases the electrical conductivity and catalytic surface area. X-ray photoelectron spectroscopy (XPS) analysis provides evidence that Fe-N-4 active centers are possibly formed in the catalyst, as is confirmed by electrochemical tests also. Compared to commercial PVC, our N/Fe-CG exhibits a similar level of catalytic activity but superior stability and methanol tolerance in both alkaline and acidic media, making it a good candidate for an ORR electrocatalyst in energy storage/conversion and other relevant applications.
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