乙醇和CO在Pt-WO_3/C电极上的电催化氧化  

Electrocatalytic oxidation of ethanol and CO at Pt-WO_3/C electrode

作　　者：孙芳[1] 邬冰[1] 李桂春[1] 高颖[1] 陆天虹[2] 刘长鹏[2] 邢巍[3] 

机构地区：[1]哈尔滨师范大学化学系,黑龙江哈尔滨150080 [2]中国科学院长春应用化学研究所,吉林长春130022 [3]南京师范大学化学与环境科学学院,江苏南京210097

出　　处：《分子科学学报》2006年第4期215-218,共4页Journal of Molecular Science

基　　金：国家科技部"973"基金资助项目(G2000026408);国家"863"计划资助项目(2003AA517062);国家自然科学基金资助项目(20573029;20373068;20433060);黑龙江省教育厅基金资助项目(10531082);江苏省科技厅高新技术基金资助项目(BG200302);江苏省教育厅高新技术产业化基金资助项目(JH02-080);国家"211"工程重点学科建设基金资助项目

摘　　要：制备并比较了Pt/C和Pt-WO3/C催化剂对乙醇的电化学氧化活性.发现无论是在酸性溶液中还是中性溶液中,Pt-WO3/C电极对乙醇氧化的电催化活性都比在Pt/C电极上高.这是由于WO3能提供乙醇在Pt上氧化所需的含氧物种,此外WO3能在较低电位下使乙醇氧化的中间产物CO氧化除去,从而提高了催化剂对乙醇氧化的催化活性.Electrooxidation behavior of ethanol at the Pt-WO3/C and Pt/C electrodes was investigated by LSV techniques. It was found that the electrocatalytic activity of the Pt-WO3/C electrode for electrooxidation of ethanol is higher than that of the Pt/C electrode either in acidic and neutral solutions. The good behavior at the Pt-WO3/C electrode for ethanol electrooxidation is due to that WO3 could supply the oxygen-containing species necessary for the electrooxidation of ethanol. The experimental results also show that Pt-WO3/C electrode can promote the COad electrooxidation. COad is believed to be the intermediate of ethanol oxidation and the main poison of Pt catalyst. COad can be electrooxidated at lower potential at Pt-WO3/C than at Pt/C electrode and can be removed from the surface of Pt-WO3/C electrode more easily.

关 键 词：乙醇 CO 电氧化 

分 类 号：O640[理学—物理化学]