直接甲醇燃料电池催化剂性能的影响因素  

Factors Influencing the Performance of Catalysts in Direct Methanol Fuel Cells

作　　者：陈维民[1] 孙公权[1] 毛庆[1] 杨少华[1] 孙丕昌[1] 辛勤[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《催化学报》2007年第8期703-708,共6页

基　　金：国家高技术研究发展计划(863计划;2006AA03Z225);国家自然科学基金(20173060)

摘　　要：考察了温度、电位及中间产物等因素对直接甲醇燃料电池催化剂性能的影响.结果表明,温度的升高会显著促进Pt催化剂粒子的聚结.对于PtRu催化剂,Ru氧化物/水合氧化物对Pt微晶的聚结具有抑制作用.高温放电实验后,PtRu催化剂的合金化程度有所提高.高电位会加速电催化剂的降解.电极反应中间产物甲酸和甲醛对甲醇电催化氧化反应具有一定的抑制作用,其中甲醛的影响更大.Several factors including temperature, potential, and intermediates that influence the performance of electrocatalysts in direct methanol fuel cells were examined. The results show that the sintering process of Pt catalyst particles was accelerated at high temperatures, and for PtRu catalysts, this process was largely inhibited by ruthenium oxides/hydroxides. The alloying degree of PtRu catalysts was elevated to some extent after the discharge test at a high temperature. The degradation of electrocatalysts was accelerated by high potential. The methanol oxidation reaction was hindered to some extent by intermediates such as formic acid and formaldehyde, especially the latter.

关 键 词：直接甲醇燃料电池 电催化剂 性能衰减 温度 电位 

分 类 号：TM911.4[电气工程—电力电子与电力传动]