CO_2在铜电极上的电还原行为  

Electrochemical Behavior of CO_2 on Copper Electrode

作　　者：张丽[1] 罗仪文[1] 钮东方[1] 肖丽平[1] 陆嘉星[1] 

机构地区：[1]华东师范大学化学系上海市绿色化学与化工过程绿色化重点实验室,上海200062

出　　处：《高等学校化学学报》2007年第9期1660-1662,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20573037);上海市自然科学基金(批准号:05JC14070)资助.

摘　　要：The electrochemical reduction of CO2 on copper electrode was investigated in acetonitrile(MeCN),dimethyl formamide(DMF)and dimethyl sulfoxide(DMSO)containing 0.1 mol/L tetraethylammonium bromioe(TEABr)by cyclic voltammetry and chronocoulometry at 298 K and under atmospheric pressure.There were obviously irreversible one-electron reduction peaks after saturated with CO2 on copper electrode in three solvents,which generated anion radical of CO2.The influence of scan rate was also studied by cyclic voltammetry.The diffusion coefficients of CO2 in MeCN,DMF and DMSO were 8.981×10-6,1.019×10-6 and 1.032×10-6 cm2/s and the transfer coefficients were 0.064,0.042 and 0.059,respectively.These results show that the electroreduction of CO2 was an irreversible diffusion controlled process.The electrochemical reduction of CO2 on copper electrode was investigated in acetonitrile（ MeCN）, dimethyl formamide（DMF） and dimethyl sulfoxide（DMSO） containing 0. 1 mol/L tetraethylammonium bromioe（TEABr） by cyclic voltammetry and chronocoulometry at 298 K and under atmospheric pressure. There were obviously irreversible one-electron reduction peaks after saturated with CO2 on copper electrode in three solvents, which generated anion radical of CO2. The influence of scan rate was also studied by cyclic voltam- metry. The diffusion coefficients of CO2 in MeCN, DMF and DMSO were 8. 981 × 10^-6, 1. 019 × 10^-6 and 1. 032 × 10^-6 cm^2/s and the transfer coefficients were 0. 064, 0. 042 and 0. 059, respectively. These results show that the electroreduction of CO2 was an irreversible diffusion controlled process.

关 键 词：CO2 铜电极 循环伏安法 计时电量法 

分 类 号：O657.1[理学—分析化学]