摘要
通过循环伏安法研究了Pt/C催化剂对甲醇的电催化氧化活性,详细地考察了甲醇浓度、温度、介质以及酸度等电化学体系因素对Pt/C催化剂活性的影响。结果表明,上述四个电化学体系因素对Pt/C催化剂活性存在着明显的影响。甲醇浓度和温度的增加可以显著降低工作电极内阻,增加电极反应速率,提高Pt/C催化剂活性。改善溶液介质和控制适宜的酸度有利于Pt/C催化剂活性的提高。在本实验条件下,其最佳的运行工艺参数为:溶液介质为二次去离子水,酸度为1.0 mol/L H2SO4。
By means of the cyclic voltammogram, the activity of Pt/C catalysts for methanol electro-oxidation and the electrochemical factors such as methanol concentration, temperature, medium and acidity were investigated. The results show that the four electrochemical factors have significantly affected the activity of Pt/C catalysts. The inner resistance of working electrode was reduced, and the reaction rate of the electrode and the activity of Pt/C catalyst were enhanced with the improvement of methanol concentration and temperature. The improved solution medium and the controlled and feasible acidity were propitious to the activity of Pt/C catalyst. In this experiment, the optimum technological parameters are solution medium of double distilled water and solution acidity of 1mol/L.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2008年第4期41-43,共3页
Nonferrous Metals（Extractive Metallurgy)
基金
教育部"新世纪优秀人才支持计划"(NCET-04-0103)
