One step synthesis of Pt/CeO_2-graphene catalyst by microwave-assisted ethylene glycol process for direct methanol fuel cell

摘要

Pt/CeO_2-graphene catalyst was rapidly prepared by an efficient one step microwave-assisted process using ethylene glycol (EG) as a green reducing agent. Platinum particles are better dispersed on CeO_2-graphene composite support with smaller sizes. In electrochemical test, Pt/CeO_2-graphene exhibited higher and more durable electrocatalytic activities for methanol oxidation than a comparative Pt/ graphene catalyst. The enhanced performance might ascribe to the general promotion of CO_(ads) electrooxidation reaction kinetics by the addition of CeO_2.