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通过恒电压以及脉冲电压在直接甲醇燃料电池(DMFCs)阳极催化剂载体(垂直取向石墨烯)表面电沉积Pt。对制得的催化剂采用扫描电子显微镜、透射电子显微镜、拉曼光谱仪、X射线衍射仪进行了表征,并采用电化学测试研究了其甲醇氧化能力。结果表明,当采用垂直取向石墨烯-碳纸(VG-CP)作为载体,且使用脉冲电压法可获得粒径更小、分布更均匀的Pt纳米颗粒,具有更优异的催化甲醇氧化性能。
Pt was electrodeposited on the surface of anodic catalyst support (vertically oriented graphene) of direct methanol fuel cells (DMFCs) by constant voltage and pulsed voltage. The prepared catalyst was characterized by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray diffractometry. The catalytic activity of methanol was studied by electrochemical tests. The results show that Pt nanoparticles with smaller size and more uniform distribution can be obtained by using VG-CP as carrier and pulsed voltage method to obtain more excellent catalytic activity for methanol oxidation.