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在室温条件下,采用超声辅助电化学方法合成了几种三维铂纳米电催化剂.利用透射电子显微镜(TEM)、X射线粉末衍射(XRD)以及电化学测试对该三维铂纳米电催化剂进行了表征.结果表明,这些铂纳米电催化剂的形貌、结构可以通过添加不同的形貌控制剂来调控,在水溶液、聚乙烯吡咯烷酮(PVP)溶液和十六烷基三甲基氯化铵(CTAC)溶液中分别得到了立方海绵状铂、分枝状铂和球形多孔状铂.其中,球形多孔状铂纳米电催化剂由于其多孔的结构,因此具有更高的电化学活性面积,对氧气还原和甲醇氧化反应具有更好的催化作用.
Several three-dimensional platinum nano electrocatalysts were synthesized by ultrasonic assisted electrochemical method at room temperature.The three-dimensional platinum nano electrocatalysts were characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and electrochemical measurements The results show that the morphology and structure of these Pt nanocatalysts can be controlled by adding different morphology control agents in aqueous solution, polyvinylpyrrolidone (PVP) solution and cetyltrimethylammonium chloride (CTAC) In the solution, cubic spongy platinum, dendritic platinum and spherical porous platinum were obtained respectively. Among them, the spherical porous platinum nano-electro-catalyst has a higher electrochemical active area due to its porous structure and has the advantages of oxygen reduction and methanol Oxidation reaction has a better catalytic effect.