The catalyst and its manufacturing method for carbon dioxide reforming

While suppressing the carbon deposition, by reacting the raw material gas and carbon dioxide hydrocarbon, efficiently providing a carbon dioxide reforming catalyst and a manufacturing method thereof capable of producing hydrogen and carbon monoxide. Ca, and carbonate of at least one alkaline earth metal selected from the group consisting of Sr and Ba, is contained as a main component a mixture comprising a catalytic metal promoting the decomposition reaction of the hydrocarbon-based raw material gas. Wherein as the catalyst metal, Ni, Rh, Ru, Ir, Pd, Pt, Re, Co, Fe, use at least one selected from the group consisting of Mo. Moreover, further ATiO Produced through the step of absorbing carbon dioxide to alkaline earth · Ti composite oxide with a carbon dioxide absorption capacity.