| Preliminary study on electrochemical reduction of carbon dioxide on nickel and platinum electrodes |
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| 作者姓名： | 宋爽 He Zhiqiao Ye Jiexu Chen Jianmeng |
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| 作者单位： | Department of Environmental Engineering, Zhejiang University of Technoloty, Hangzhou 310032, P.R. China |
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| 基金项目： | 国家自然科学基金
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浙江省自然科学基金 |
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| 摘 要： | The electrochemical reduction of carbon dioxide was investigated on nickel and platinum electrodes in 0.5 mol dm^-3 KHCO3 solutions. The main products were formic acid and carbon monoxide during the electroreduction of CO2, and the Faradaic efficiency for this process depended on the characteristics of the electrode. At ambient temperature and pressure, the Faradaic efficiency was measured to be 8.6% and 2.5 % respectively for the production of formic acid and CO with Pt electrode at - 1.3V vs Ag/AgCl （saturated KCl）. At this same potential, the Faradaic efficiency was measured to be 8.9% and 1.7% respectively with Ni electrode. Tafel plots showed that the electrochemical reduction of CO2 was not limited by the mass transfer process in the range of -0.8 to - 1.2V vs Ag/AgCl （saturated KCl）.
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| 关 键 词： | 电化学还原 CO2 KHCO3 水溶液 镍电极 铂电极 |
| 收稿时间： | 2005-04-29 |
Preliminary study on electrochemical reduction of carbon dioxide on nickel and platinum electrodes |
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| Song Shuang,He Zhiqiao,Ye Jiexu,Chen Jianmeng.Preliminary study on electrochemical reduction of carbon dioxide on nickel and platinum electrodes[J].High Technology Letters,2006,12(3):333-336. |
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| Authors: | Song Shuang He Zhiqiao Ye Jiexu Chen Jianmeng |
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| Abstract: | The electrochemical reduction of carbon dioxide was investigated on nickel and platinum electrodes in 0.5 mol dm-3 KHCO3 solutions. The main products were formic acid and carbon monoxide during the electroreduction of CO2, and the Faradaic efficiency for this process depended on the characteristics of the electrode. At ambient temperature and pressure, the Faradaic efficiency was measured to be 8.6% and 2.5% respectively for the production of formic acid and CO with Pt electrode at -1.3V vs Ag/AgCl (saturated KCl). At this same potential, the Faradaic efficiency was measured to be 8.9% and 1.7%respectively with Ni electrode. Tafel plots showed that the electrochemical reduction of CO2 was not limited by the mass transfer process in the range of -0.8 to -1.2V vs Ag/AgCl (saturated KCl). |
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| Keywords: | electrochemical reduction CO2 KHCO3 aqueous solution Ni electrode Pt electrode |
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