Porous Ag–CGO cermets as anode materials for ITSOFC using CO fuel

A novel route was developed for preparing Ag–CGO porous cermets as the anode materials for intermediate-temperature solid oxide fuel cells (ITSOFCs) using Ce0.8Gd0.2O1.9(CGO) electrolyte. Porous CGO was prepared by leaching MgO from MgO–CGO ceramics with acetic acid and then impregnated with AgNO3 solution. Porous cermet that contained 45 wt% Ag with the optimal porosity of 48% was a promising anode material for ITSOFCs using CO as the fuel. It yielded an electrical conductivity of 1260 S cm−1 at 923 K and a CO oxidation rate of 0.6mmolmin-1gcat-1, and it was catalytically stable under reaction condition for 50 h with negligible carbon deposition.