摘要：为了开发高性能燃料电池催化剂, 研究以氧化石墨烯为载体和碳源合成VC及其负载Pt催化剂的合成、结构和催化氧还原性能。结果表明:氧化石墨烯可以作为碳源在氢气气氛下与V₂O₃原位合成VC, 同时在氨气气氛下热处理还可以对其进行氮的掺杂, 氮掺杂将其催化氧还原的起始电势提高了0.15V。石墨烯与氮掺杂VC负载Pt具有良好的催化氧还原性能, 其峰值电流、起始电势以及循环寿命都超过了传统的Pt-C催化剂。

关键词：氧化；石墨烯；碳化钒；氧化原催化剂

Abstract：To develop the high-performance catalysts for fuel cells, The synthesis of VC was investigated, which adopted graphene oxide as both support and carbon source. The synthesis, structure and catalytic performance for oxygen reduction of VC supported Pt were researched. Results showed that the graphene oxide could react with V₂O₃ in hydrogen atmosphere and in-situ forming VC. The nitrogen can be doped to VC when heat-treated in ammonia atmosphere. The doping of nitrogen enhanced the catalytic performance of VC for oxygen reduction. The graphene and nitrogen doped VC supported Pt showed good catalytic performance for oxygen reduction. The peak current intensity, onset potential and cyclic life surpassed that of traditional Pt/C catalyst.

Keywords: Oxygen reduction；graphene oxide；vanadium carbide；catalysts of oxygen reduction