Patent ID: 8178003

Claim:
A reforming catalyst, comprising a composite oxide having a composition represented by the following formula (I) in which Co, Ni and M are dispersed in said composite oxide: a M. b Co. c Ni. d Mg. e Ca. f O (I) wherein a, b, c, d, e, and f are molar fractions, a+b+c+d+e=1, 0.0001<a≦0.20, 0<b≦0.20, 0<c≦0.20, 0.001<(b+c)≦0.20, 0.60≦(d+e)≦0.9989, 0<d<0.9989, 0<e<0.9989, f=the number necessary for element to keep charge equilibrium with oxygen, and M is at least one element selected from the group consisting of Group 3B elements and Group 6A elements in the Periodic Table.