脉冲电沉积法应用于铂/垂直取向石墨烯直接甲醇燃料电池催化剂

Pulse electrodeposition of Pt on vertical oriented graphene as catalysts for DMFCs

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。

Electrodeposition with constant potential and pulse potential were applied to the support material（vertical oriented graphene,VG）of anode catalysts for direct methanol fuel cells（DMFCs）,respectively.The as-prepared catalysts were investigated through scan electron microscopy,transmission electron microscopy,raman spectra,X-ray diffraction.The activities of the catalysts toward methanol oxidation reaction were examined by electrochemical measurement.The results indicated that using pulse potential method,the Pt nanoparticles can be deposited on the VG surface with a smaller size and better dispersion,leading to enhanced catalytic performance toward methanol oxidation reaction.