Patent ID: 7943710

Claim:
An Mo—Bi—Nb based composite metal oxide, which is represented by the following Formula 1: Mo a Bi b Nb c A d B e C f D g E h F i O j [Formula 1] wherein Mo represents molybdenum, Bi represents bismuth, and Nb represents niobium; A is at least one element selected from the group consisting of W, Sb, As, P, Sn and Pb; B is at least one element selected from the group consisting of Fe, Zn, Cr, Mn, Cu, Pd, Ag and Ru; C is at least one element selected from the group consisting of Co, Cd, Ta, Pt and Ni; D is at least one element selected from the group consisting of Si, Al, Zr, V and Ce; E is at least one element selected from the group consisting of Se, Ga, Ti, Ge, Rh and Au; F is at least one element selected from the group consisting of Na, K, Li, Rb, Cs, Ca, Mg, Sr, Ba and MgO; each of a, b, c, d, e, f, g, h, i, and j represents the atomic ratio of each element; and when a=12, b is 0.01 to 20, c is 0.001 to 20, d is 0 to 15, e is 0 to 20, f is 0 to 20, g is 0 to 10, h is 0 to 10, i is 0 to 10, and j is a value defined by the oxidation state of each of the above elements, with the proviso that e, f, and i are not zero.