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- Title
A Novel Carbon-Encapsulated Cobalt-Tungsten Carbide as Electrocatalyst for Oxygen Reduction Reaction in Alkaline Media.
- Authors
Zhong, G.; Wang, H.; Yu, H.; Peng, F.
- Abstract
Carbon-encapsulated cobalt-tungsten carbides (CoWC@C) were synthesized by reduction and carbonization method and used as the electrocatalyst for oxygen reduction reaction (ORR) in direct methanol fuel cells. The as-prepared samples were characterized by transmission electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. The results show that CoWC@C consists of outer layer carbon and internal Co3W3C, WC, and Co. The cyclic voltammetry results show that CoWC@C has high ORR activity, long-term durability, and good methanol-tolerant performance. It is revealed that the main active phase for ORR of CoWC@C is Co3W3C, and the outer layer carbon plays the role in improving the durability of the catalyst.
- Subjects
HEAT-resistant cobalt-tungsten carbide alloys; ELECTROCATALYSTS; CHEMICAL reactions; X-ray diffraction; X-ray photoelectron spectroscopy; CYCLIC voltammetry
- Publication
Fuel Cells, 2013, Vol 13, Issue 3, p387
- ISSN
1615-6846
- Publication type
Article
- DOI
10.1002/fuce.201300057