Abstract
This study reports the catalytic activity of transition metal electrocatalysts (Co, Ni, and Cu) incorporated into Gd0.1Ce0.9O1.95 (GDC10) cathodes for the electroreduction of CO2 in solid oxide electrolyzer cells (SOECs). CO2 electroreduction performance of cells having porous and non-infiltrated GDC10 cathodes was compared with the performance of cells containing transition metal electrocatalysts infiltrated into porous GDC10 cathodes at 750, 800, and 850 °C. Results showed that cells with Co infiltrated cathodes had the best catalytic activity towards CO2 electroreduction. Furthermore, these cells displayed good stability towards CO2 electroreduction, having a faradaic efficiency value close to 100% with insignificant voltage increase when tested for 48 h at 750 and 850 °C under the current densities of 0.2, and 0.4 A cm −2, respectively.
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