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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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.
关键词
CO2
铜电极
循环伏安法
计时电量法
Carbon dioxide
Copper electrode
Cyclic voltammetry
Chronocoulometry
