氧化锌负载金和铂选择催化氧化燃料电池氢源中微量CO的研究  

Selective catalytic oxidation of CO in rich hydrogen over gold-platinum supported on zinc oxide for potential application in fuel cell

作　　者：张金昌[1] 王艳辉[1] 马润宇[1] 吴迪镛[2] 王祥生[3] 

机构地区：[1]北京化工大学可控化学反应科学与技术教育部重点实验室,北京100029 [2]中国科学院大连化学物理研究所,大连116023 [3]大连理工大学化工学院,大连116011

出　　处：《北京化工大学学报（自然科学版）》2003年第1期1-4,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金 ( 2 0 2 760 0 5 );北京化工大学青年教师基金 (QN0 12 0 )

摘　　要：采用共沉淀法制备了负载型Au/ZnO催化剂 ,采用催化氧化方法脱除富氢中微量的CO研究结果表明 ,催化剂中Au的合适含量 (质量分数 )为 1 5 % ,适宜的焙烧温度为 3 0 0℃ ,即Au( 1 5 ) /ZnO 3 0 0。在Au( 1 5 ) /ZnO 3 0 0体系中加入少量的PtO组分有利于提高催化剂的稳定性。进一步研究表明 ,当Pt含量超过 1 0 %时 ,会降低催化剂的催化氧化选择性。因此在实验条件下 ,催化剂比较理想的组成为 1 5 %Au ,1 0 %Pt,焙烧温度为 3 0 0℃ ,即Au( 1 5 ) Pt( 1 0 ) /ZnO 3 0 0。对制备的催化剂采用XRD ,BET进行了基本表征 。The zinc oxide catalysts were prepared by using a coprecipitation procedure and it showed that its optimum composition was 1.5% by weight in ZnO and the ideal calcining temperature was 300?℃, tagged as Au(1.5)/ZnO-300. When a little amount of platinum was added into Au(1.5)/ZnO-300, it showed that the catalyst had better stability during 500 hours continuous experimental investigation for Au(1.5)-Pt/ZnO-300 to selectively remove CO at 80?℃. However, when the content of platinum in Au(1.5)/ZnO-300 was over 1.0%, the selectivity of removal of CO for Au(1.5)-Pt/ZnO-300 was lowered with increasing content of Pt. The ideal composition for Au(1.5)-Pt/ZnO-300 was 1.0% Pt by weight, tagged as Au(1.5)-Pt(1.0)/ZnO-300.

关 键 词：氧化锌 金 铂 选择催化氧化 燃料电池 氢源 CO Au/ZnO催化剂 Au-Pt/ZnO 负载型催化剂 

分 类 号：TM911.4[电气工程—电力电子与电力传动]