CsH2PO4 as Electrolyte for the Formation of CH4 by Electrochemical Reduction of CO2

Abstract

It has been shown that methane can be formed in high amounts by co-electrolysis of CO2 and H2O using a nickel cathode, a CsH2PO4–SiC composite electrolyte and an IrO2 anode. The experimental conditions were 300 °C and 8 bar. The maximum efficiency close to 100% for methane was obtained at a current density of 10–15 mA cm−2. A small amount of hydrogen was formed as the only other product.