A Novel Carbon-Encapsulated Cobalt-Tungsten Carbide as Electrocatalyst for Oxygen Reduction Reaction in Alkaline Media

作者：Zhong, G.; Wang, H.^*; Yu, H.; Peng, F.

来源：Fuel Cells, 2013, 13(3): 387-391.

DOI：10.1002/fuce.201300057

• Alkaline Media
• Cathode
• Direct Methanol Fuel Cell
• Electrocatalyst
• Oxygen Reduction Reaction

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.

• 出版日期2013-6
• 单位华南理工大学