Patent ID: 8213154

Claim:
A nickel oxide co-doped with a first alkali metal dopant and a second metal dopant, the nickel oxide having a composition represented by the general formula (I): R v X y Ni z O (I) wherein R is the first alkali metal dopant; X is the second metal dopant selected from the group consisting of at least one of tin, antimony, indium, tungsten, iridium, scandium, gallium, vanadium, chromium, gold, yttrium, lanthanum, ruthenium, rhodium, molybdenum and niobium; v, y and z are stoichiometric ratios and wherein v is 0.001≦v≦0.35; y is 0.001≦y≦0.05; z is 0.60≦z≦0.998; and wherein v+y+z=1.