固体电解质电解池一氧化碳电催化还原反应研究  

Electrocatalytic Reduction of Carbon Monoxide on Cu,Fe,Brass Electrode in Solid Electrolyte Cells

作　　者：郝金库[1] 曹映玉[1] 申勇立[1] 诸葛尚琦[1] 白冬花[1] 

机构地区：[1]天津师范大学化学与生命科学学院,天津300074

出　　处：《高等学校化学学报》2006年第6期1131-1134,共4页Chemical Journal of Chinese Universities

基　　金：教育部重点基金(批准号:03009);天津市自然科学基金(批准号:023606411)资助

摘　　要：以α-Zr(HPO4)H2O为质子固体电解质设计电解池,于常温常压实现了CO电催化加氢还原反应,反应产物与电极材料、电流密度密切相关.Cu/ZrP电极表面反应主要产物是甲醛,电流密度100 mA/cm2时,甲醛的Farad ic效率达到29.0%,Fe/ZrP电极表面反应主要产物是乙烯,电流密度100 mA/cm2-时,乙烯的Farad ic效率达到15.0%.A new electrolysis system was developed for the conversion of CO to formaldehyde and ethylene, in which the electrochemical reduction took place at the two-phase （gas/solid） interface on Cu, Fe and Brass electrodes with α-Zr（ HPO4 ） 2H2O（ZrP） used as proton-conducting solid electrolyte at room temperature and atmospheric pressure. The products for eletroreduction of CO depended on the different metal electrodes and the current densities. Considerable faradic efficiency was observed for HCHO at Cu/ZrP cathode electrode over a wide range of current density. And the faradic efficiency of HCHO increased with the increase of the current density and approached 29. 0% at a current density of 100 mA · cm^-2. The Cu/ZrP cathodic surface reaction mechanism was proposed, i. e. , oxygen-containing Cu…HCO was formed and the fine product HCHO was obtained. The faradic efficiency of C2 H4 increased with the increase of the current density and approached 15.0% at a current density of 100 mA · cm^-2 on Fe/ZrP cathode electrode. The Fe/ZrP surface reaction mechanism was proposed, that was, radical coordinate Fe … CH2 was formed and the product C2 H4 was obtained.

关 键 词：电催化 一氧化碳 还原 固体电解质 

分 类 号：O646.5[理学—物理化学]