微波法合成PtMo_x/C催化剂及其甲醇电氧化催化性能  

Microwave-synthesis of PtMo_x/C catalyst and electro-catalytic performance of methanol oxidation

作　　者：杜娟[1] 原鲜霞[1] 余江虹[1] 马紫峰[1] 

机构地区：[1]上海交通大学化学工程系,上海200240

出　　处：《电源技术》2007年第11期873-876,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(50236010;20476055);上海市曙光计划(03SG12);教育部新世纪优秀人才计划

摘　　要：寻找既具有高的甲醇电氧化催化活性、又具有强的抗CO中毒能力的阳极催化剂是当前DMFC研究工作者的迫切任务。在比较研究传统的液相浸渍还原法和微波合成技术对催化剂PtMo1/2/C微观形貌、晶体结构和甲醇电氧化催化活性影响的基础上,系统研究了Pt和Mo的原子配比对PtMox/C催化剂晶体结构、甲醇电氧化催化活性和抗CO中毒能力的影响。结果表明,微波法更有利于制得高结晶度、均匀分散、甲醇氧化催化活性更高的催化剂;微波法制得的催化剂PtMox/C中,Mo的加入虽然使催化剂的晶格参数有所改变,但PtMox/C仍表现为Pt的(fcc)晶型,其中PtMo1/2/C具有最好的甲醇氧化催化性能和抗CO中毒能力。Effects of microwave-synthesis and impregnation method on the microstructure and the electro-catalytic activity of PtMo1/2/C catalyst were studied. In addition, the effects of atom ratio of Pt and Mo on the crystal structure, the electro-catalytic activity to methanol electro-oxidation and the CO tolerance of PtMox /C catalysts were investigated systematically. The results show that microwave-synthesis is more beneficial to obtain the highly dispersed catalyst and to improve the electro-catalytic activity of the catalyst, the crystal of PtMox/C is always exhibited to the fcc structure even though the addition of Mo can slightly change the crystal parameters of Pt/C catalyst. Among the catalysts of PtMox/C, PtMo1/2/C is the best one for both methanol electro-catalytic-oxidation and CO tolerance.

关 键 词：微波合成法 PtMox/C催化剂 甲醇电催化氧化 CO消除伏安法 

分 类 号：TM911.4[电气工程—电力电子与电力传动]