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Synthesis of graphene-supported onedimensional nanoporous Pt based catalysts, and their enhanced performance on methanol electro-oxidation

机译：石墨烯负载一维纳米多孔铂基催化剂的合成及其对甲醇电氧化的增强性能

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摘要

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.
机译：开发了一种新颖的方法，以Te NWs为模板，基于置换反应合成负载在还原型氧化石墨烯（RGO）上的PtIr或Pt纳米线（NWs）。所得的RGO负载的PtIr和Pt电催化剂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进行表征。 TEM图像显示这些基于Pt的催化剂均匀地分布在具有一维（1D）纳米孔结构特征的石墨烯基质中。作为直接甲醇燃料电池中使用的有希望的阳极材料之一，这些一维纳米多孔PtIr / RGO（或Pt / RGO）杂化物相对于没有石墨烯载体的PtIr或Pt NW表现出更大的电活性表面并增强了对甲醇反应的催化活性。 。

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