Sm^(3+)对甲醇电化学氧化反应的助催化作用  

Studies on Promoting Catalysis of Sm^(3+) Towards Oxidation of Methanol on the Pt Electrode

作　　者：杜秉忱[1] 刘晶华[1] 薛新忠[1] 徐维林[1] 邢巍[1] 陆天虹[1] 桑革[2] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022 [2]中国工程物理研究院,绵阳621900

出　　处：《高等学校化学学报》2004年第5期917-921,共5页Chemical Journal of Chinese Universities

基　　金：国家"八六三"计划项目 (批准号 :2 0 0 3 AA 5 170 62 );国家"九七三"计划项目 (批准号:G2 0 0 0 0 2 64 0 8);吉林省自然科学基金(批准号 :2 0 0 0 0 5 10 )资助

摘　　要：分别以相同面积的光滑 Pt电极和吸附了 Sm3+ 的铂电极作为工作电极 ,在酸性介质中采用循环伏安法对甲醇氧化进行测定 .结果表明 ,吸附了 Sm3+ 的 Pt电极上产生了更大的氧化电流 ,表明 Sm3+ 的加入对甲醇的电催化氧化起到了促进作用 .这一研究结果在直接甲醇燃料电池 ( DMFC)Electrocatalytic performance of Sm 3+ adsorbed on the smooth surface of Pt electrode toward the oxidation of methanol has been studied. The experimental results show that Sm 3+ has a high promoting catalysis for electrocatalytic oxidation of methanol in electrolyte. According to the positive experimental data(cyclic voltammograms) and the theoretical analysis, one coordination complex Pt-Sm 3+-CH 3OH may be formed and acted as a critical intermediate during the reaction of methanol oxidation. Some in-situ spectral characterizations are in the process to confirm the existence of the complex. The mechanism of promoting effect of Sm 3+ toward the electrocatalytic oxidation of methanol was deduced.

关 键 词：直接甲醇燃料电池 甲醇 电化学氧化反应 助催化作用 钐 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O623.411[理学—有机化学]