碱性介质中甲醇在PdMo/MWCNT上的电化学氧化

Methanol electrooxidation on Pd Mo/MWCNT in alkaline medium

采用乙二醇还原法制备了直接甲醇燃料电池阳极Pd Mo/MWCNT催化剂,并通过透射电子显微镜(TEM)、X-射线光电子能谱(XPS)、循环伏安(CV)及电化学阻抗谱(EIS)等手段,考察了Pd Mo/MWCNT催化剂在碱性介质中对甲醇电氧化反应的催化性能。结果表明,Mo的引入改善了Pd纳米粒子的分散性并提高了其甲醇电氧化性能。经300℃焙烧后得到的Mo氧化物对Pd纳米催化剂的甲醇氧化活性和抗中毒能力具有较好的促进作用。

An anode catalyst Pd Mo/MWCNT for direct methanol fuel cells was prepared by the ethylene glycol reduction method. The catalytic activity of Pd Mo/MWCNT for methanol oxidation in the alkaline solution was examined by transmission electron microscope（TEM）, X-ray photoelectron spectroscopy（XPS）, cyclic voltammetry（CV） and electrochemical impedance spectra（EIS）. The results show that the dispersion of Pd nanoparticles is improved for the introduction of Mo and the catalytic activity for methanol oxidation is increased.The Mo oxides obtained after a calcination at 300 ℃, a strong promoting effect for the catalytic activity and the poison resistance of the Pd nanocatalyst were displayed..