Hong Liji, Hao Yanfei, Yang Yunyun, Yuan Junhua, Niu Li
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Life Sciences and Chemistry, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China.
Nanotechnology. 2015 Jan 30;26(4):045604. doi: 10.1088/0957-4484/26/4/045604. Epub 2015 Jan 8.
A novel approach is developed to synthesize PtIr or Pt nanowires (NWs) supported on the reduced graphene oxide (RGO) using Te NWs as template based on the replacement reaction. The resulting RGO-supported PtIr and Pt electrocatalysts are characterized by transmission electron microscopy (TEM), energy-dispersive x-ray spectroscopy and electrochemical techniques. TEM images show that these Pt based catalysts are uniformly distributed in the matrix of graphene with a characteristic of one-dimensional (1D) nanoporous structure. As one of promising anode materials used in the direct methanol fuel cells, these 1D nanoporous PtIr/RGO (or Pt/RGO) hybrids exhibit an enlarged electroactive surface and enhanced catalytic activity toward the methanol reaction relative to those PtIr or Pt NWs without graphene support.
基于置换反应，开发了一种以碲纳米线为模板合成负载在还原氧化石墨烯（RGO）上的铂铱或铂纳米线（NWs）的新方法。通过透射电子显微镜（TEM）、能量色散X射线光谱和电化学技术对所得的RGO负载的铂铱和铂电催化剂进行了表征。TEM图像表明，这些铂基催化剂均匀分布在石墨烯基质中，具有一维（1D）纳米多孔结构的特征。作为直接甲醇燃料电池中一种有前景的阳极材料，相对于那些没有石墨烯载体的铂铱或铂纳米线，这些一维纳米多孔铂铱/RGO（或铂/RGO）杂化物表现出扩大的电活性表面和对甲醇反应增强的催化活性。
