Electrochemical Carbon Dioxide Reduction in Methanol at Cu and Cu2O-Deposited Carbon Black Electrodes
Electrochemical Carbon Dioxide Reduction in Methanol at Cu and Cu2O-Deposited Carbon Black Electrodes
复制标题
DOI：
10.3390/chemengineering3010015
复制
发表时间：
2019-02
期刊：
影响因子：
2.5
通讯作者：
N. Uemoto;M. Furukawa;Ikki Tateishi;H. Katsumata;S. Kaneco
中科院分区：
文献类型：
--
作者：
N. Uemoto;M. Furukawa;Ikki Tateishi;H. Katsumata;S. Kaneco
研究了Cu和Cu 2 O负载炭黑（Vulcan XC-72）纳米粒子电极在甲醇中对CO2的电化学还原。在此，通过Cu离子的还原法合成了Cu或Cu 2 O沉积的炭黑催化剂，并将滴铸法应用于改性炭黑电极的制造。通过分散催化剂颗粒制备催化剂油墨溶液，并将催化剂油墨添加到碳板上。悬浮液的pH值对控制金属铜的Cu物种和沉积在炭黑上的Cu 2 O物种是有效的。在没有Cu沉积的情况下，在电化学CO2还原中仅产生CO和甲酸甲酯，并且几乎不能观察到烃的产生。相反，通过使用Cu或Cu 2 O沉积的炭黑电极形成烃。在-1.9 V时，在Cu 2 O沉积的炭黑催化剂上，烃的最大法拉第效率为40.3%（甲烷为26.9%，乙烯为13.4%）。相反，在此条件下，析氢率可降低至34.7%。
The electrochemical reduction of carbon dioxide in methanol was investigated with Cu and Cu2O-supported carbon black (Vulcan XC-72) nanoparticle electrodes. Herein, Cu or a Cu2O-deposited carbon black catalyst has been synthesized by the reduction method for a Cu ion, and the drop-casting method was applied for the fabrication of a modified carbon black electrode. A catalyst ink solution was fabricated by dispersing the catalyst particles, and the catalyst ink was added onto the carbon plate. The pH of suspension was effective for controlling the Cu species for the metallic copper and the Cu2O species deposited on the carbon black. Without the deposition of Cu, only CO and methyl formate were produced in the electrochemical CO2 reduction, and the production of hydrocarbons could be scarcely observed. In contrast, hydrocarbons were formed by using Cu or Cu2O-deposited carbon black electrodes. The maximum Faraday efficiency of hydrocarbons was 40.3% (26.9% of methane and 13.4% of ethylene) at −1.9 V on the Cu2O-deposited carbon black catalyst. On the contrary, hydrogen evolution could be depressed to 34.7% under the condition.