不同载量Pt/C催化剂制备及其对甲醇氧化的电催化活性  

Preparation of Pt/C Catalysts with Different Pt Loadings and their Electrocatalytic Activities for Methanol Oxidation

作　　者：唐亚文[1] 张玲玲[1] 李钢[1] 周益明[1] 高颖[2] 陆天虹[1] 

机构地区：[1]南京师范大学化学与环境科学学院,南京210097 [2]哈尔滨师范大学理化学院化学系

出　　处：《应用化学》2007年第9期991-995,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20373068;20433060;20573057;20573029);江苏省科技厅基金(BK2006224);江苏省教育厅基金(05KJB150061)资助项目

摘　　要：用甲醇作溶剂,SnCl2作还原剂,采用改进的有机溶胶方法制备了用于直接甲醇燃料电池(DMFC)中甲醇氧化的炭载Pt(Pt/C)催化剂。制得的Pt/C催化剂中的Pt粒子具有高度的均一性和良好的分散度。通过控制溶剂的蒸发温度,能够获得Pt粒子平均粒径基本相同、Pt载质量分数为10%～60%的Pt/C催化剂,粒径为3.3～4.3nm。将获得的催化剂通过涂膜-热压法制备成DMFC膜电极,研究了Pt载量对甲醇电催化氧化性能的影响。结果表明,质量分数为40%的Pt/C催化剂对甲醇的电催化氧化显示出优异的电催化性能。Carbon supported Pt （Pt/C） catalyst was prepared via the improved organic sol method with methanol as the solvent and SnCl2 as reductant. This method has the advantages of simple procedure and low cost. The Pt particles in the Pt/C catalyst Prepared with this method possess the high uniformity and good dispersity. The Pt/C catalysts with Pt loadings from 10% to 60% were prepared and the Pt particle sizes in the Pt/C catalysts are basically the same with adjusting the evaporating temperature of the solvent, particle size between 3.3 -4.3 nm. The membrane electrode assemblies（MEA） with the different Pt/C catalysts were pre- pared with the coating and hot-press method, and the effect of Pt loading on the electrocatalytic activity of Pt/ C catalysts was studied, too. The result shows that the Pt/C catalyst with 40% Pt loading shows an excellent electrocatalytic activity for the methanol oxidation.

关 键 词：有机溶胶法 PT/C催化剂 Pt载量 甲醇 

分 类 号：O646[理学—物理化学]