Abstract
A novel route was developed for preparing Ag–CGO porous cermets as the anode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs) using Ce0.8Gd0.2O1.9 (CGO) electrolyte. Porous CGO was prepared by leaching MgO from MgO–CGO ceramics with acetic acid and then impregnating with AgNO3 solution. Porous cermet that contained 45 wt% Ag with the optimal porosity of 48% was a promising anode material for IT-SOFCs using CO as the fuel. It yielded an electrical conductivity of 1260 S/cm at 650°C and a CO oxidation rate of 0.6 mmol/min gcat, and it was catalytically stable under reaction conditions for 50 h with negligible carbon deposition.
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