Electrochemical Reduction of C0₂on Cu in 0.1 M KOH-Methanol

Abstract

Abstract The electrochemical reduction of carbon dioxide in 0.1 M KOH-methanol electrolyte was investigated with a copper electrode at −30, −15, 0, and 15°C. The main products from carbon dioxide by electrochemical reduction were carbon monoxide, formic acid, ethylene, and methane. Under the optimum experimental conditions, 56% Faradaic efficiency carbon monoxide, 23% formic acid, and 10% methane were produced from carbon dioxide by electrochemical reduction. The best ethylene formation (12%) was obtained at −2.2 V and 0°C. Keywords: Cu electrodeeffect of temperatureelectrochemical reduction of carbon dioxideKOH-methanol electrolyteC2H4 CH4 HCOOHand CO formations Notes This work was supported financially in part by the Grant-in-Aid for Scientific Research (07650989) from the Ministry of Education of Japan and the Chubu Electric Power Foundation. Additional informationNotes on contributorsKIYOHISA OHTA Address correspondence to Kiyohisa Ohta, Department of Chemistry for Materials, Faculty of Engineering, Mie University, Tsu, Mie 514, Japan.