Electrocatalytic internal reforming of CO₂ by CH₄ was studied in solid oxide fuel cell (SOFC) membrane reactor system which generates electricity and syngas. The NiO-YSZ-CeO₂ based anode catalysts were prepared by a physical mixing and characterized by N₂ physisorption, SEM and XRD. Catalytic activity and electrochemical properties were measured by GC and Potentiostat-Galvanostat. It was found that NiO_0.55YSZ_0.45CeO₂ catalyst is a promising candidate for development as a catalyst anode material for an electrocatalytic reforming in the SOFC system.