Synthesis and reactivity study of gadolinia doped ceria–nickel: A potential anode material for solid oxide fuel cell

A series of Ce0.9Gd0.1O2−δ–Ni cermets with different Ni contents were prepared by conventional sintering process. The chemical compatibility between Ce0.9Gd0.1O2−δ (CGO) and Ni was investigated by X-ray diffraction, scanning electron microscopy, differential scanning calorimetry and X-ray photoelectron spectroscopy. Sintering and reduction temperatures of CGO–Ni cermets were also identified. Thermal expansion coefficients of the cermets were measured as a function of Ni content. No reaction or solid solubility between CGO and Ni was found.