Surface scientific approaches to clarify the interaction between metal catalysts and carbon supports

石墨烯上支持的铂簇的尺寸成功地控制在亚纳米到4纳米之间。Pt亚纳米团簇对CO的电氧化具有较高的催化活性，随着Pt粒径的增大，活性降低。与体Pt相比，亚纳米Pt团簇的电子结构发生了明显的改变，即对Pt/石墨烯催化剂的碳支撑效应显著。氮掺杂石墨烯进一步改变了Pt簇的电子结构和催化性能。研究项目的结果意味着石墨烯支持的铂催化剂可以应用于燃料电池。

The size of Pt clusters supported on graphene was successfully controlled between sub-nanometers and 4 nm. The Pt subnano-clusters show high catalytic activities for electro-oxidation of CO. The activities decrease with increasing particle size of Pt. The electronic structure of Pt clusters with subnano-meters is significantly modified compared to that of bulk Pt. That is, the carbon support effect is significant for Pt/graphene catalysts. Nitrogen-doping into graphene further modified the electronic structure and the catalytic properties of Pt clusters. The results in the research project mean that graphene-supported Pt catalysts can be applied to fuel cells.