| Summary: | In this work, porous complex and metal-free cathodes based on a (La<sub>0.6</sub>Sr<sub>0.4</sub>) (Cr<sub>0.5</sub>Mn<sub>0.5</sub>) O<sub>3</sub> (LSCM) screen-printed backbone infiltrated with Ce<sub>0.9</sub>Gd<sub>0.1</sub>O<sub>2</sub> (GDC) were fabricated for solid oxide electrolyzer cells. GDC infiltration has been optimized by structural and microstructural investigation and tested by electrochemical measurements in CO/CO<sub>2</sub> mixtures. Infiltrated electrodes with a non-aqueous GDC solution showed the best electro-catalytic activity towards CO<sub>2</sub> reduction, exhibiting a much lower polarization resistance, i.e., R<sub>pol</sub> = 0.3 Ω·cm<sup>2</sup> at 900 °C. The electrochemical performance of LSCM/GDCE in terms of R<sub>pol</sub> is comparable to the best-performing Ni-YSZ cathode in the same operating conditions (R<sub>pol</sub> = 0.23 Ω·cm<sup>2</sup>).
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