Electrochemical reduction of carbon dioxide to ethylene at a copper electrode in methanol using potassium hydroxide and rubidium hydroxide supporting electrolytes
Electrochemical reduction of carbon dioxide to ethylene at a copper electrode in methanol using potassium hydroxide and rubidium hydroxide supporting electrolytes
复制标题
DOI：
10.1016/j.electacta.2005.09.025
复制
发表时间：
2006-04-10
影响因子：
6.6
通讯作者：
Ohta, K
中科院分区：
文献类型：
--
作者：
Kaneco, S;Katsumata, H;Ohta, K
以氢氧化钾和氢氧化铷为载体，研究了Cu电极在甲醇中对CO2的电化学还原。二氧化碳的主要产物是甲烷、乙烯、一氧化碳和甲酸。在-4.0 V条件下，对Ag/AgCl，饱和KCl在KOH/甲醇中的最大电流效率为37.5%。在KOH/甲醇和RbOH/甲醇电解质中，乙烯/甲烷的典型电流效率比值r(f)(C2H4)/r(f)（CH4）分别为2.3和6.7。在KOH/甲醇中，与CO2还原反应相竞争的产氢效率降至3.3%以下。在此基础上，实现了高效的电化学co2 -乙烯转化方法。未来推进这项技术的工作可能包括使用太阳能作为电能来源。这项研究有助于从现成和廉价的原材料，工业吸收器的二氧化碳饱和甲醇（recetsol工艺）大规模生产燃料气体。(c) 2005 Elsevier Ltd版权所有。
The electrochemical reduction of CO2 with a Cu electrode was investigated in methanol using potassium hydroxide and rubidium hydroxide supporting salts. The main products from CO2 were methane, ethylene, carbon monoxide and formic acid. The maximum current efficiency for ethylene was of 37.5%, at -4.0 V versus Ag/AgCl, saturated KCl in KOH/methanol. The typical ratios of current efficiency for ethylene/methane, r(f)(C2H4)/r(f)(CH4), were 2.3 and 6.7, in KOH/methanol and RbOH/methanol-based electrolytes, respectively. In KOH/methanol, the efficiency of hydrogen formation, a competing reaction of CO2 reduction, was depressed to below 3.3%. On the basis of this work, the high efficiency electrochemical CO2-to-ethylene conversion method appears to be achieved. Future work to advance this technology may include the use of solar energy as the electric energy source. This research can contribute to the large-scale manufacturing of fuel gases from readily available and inexpensive raw materials, CO2-saturated methanol from industrial absorbers (the Rectisol process). (c) 2005 Elsevier Ltd. All rights reserved.