摘要
电催化剂是质子交换膜燃料电池中非常重要的关键材料。文中详细地介绍了大连化学物理研究所燃料电池工程中心所研制的高分散度Pt/C催化剂的制备和表征结果 ,采用这种Pt/C催化剂组装了 5kW的电池组 ,电池组良好的性能验证了催化剂的高活性。为了提高催化剂的利用率 ,文中研究了催化剂分散度和电池性能的关系。研究表明阳极侧催化剂分散度越高对提高电池的性能越有利 ,而在阴极侧Pt分散度的增加对电池的性能影响不大 ,这是因为反应界面上Pt分散度增加后降低了氧还原反应的比活性。
CO tolerance electrocatalysts of PtRu/C and PtRu - HxWOy/C were prepared and characterized . A composite support method was applied to prepare PtRu - HxWOy/C. The performances of cell made of the CO tolerance catalysts were much higher than that of Pt/C when CO containing fuelwas applied. A composite structure electrode was developed, and showed good CO tolerance. At last a 5 - kW PEMFC stack equipped with the composite structure electrodes was operated with methanol reforming fuel, and showed good performance.
出处
《贵金属》
CAS
CSCD
2002年第3期1-7,共7页
Precious Metals
