Catalytic Properties of CuMoO4 Doped with Co, Ni, and Ag

Abstract

Modified copper molybdate phases which differ in unit-cell parameters from undoped CuMoO4 have been prepared using the pyrolysis of mixtures of Cu, Mo, and Co (Ni, Ag) extracts. Increasing the Co or Ni content from 1 to 7 at % increases the content of the modified copper molybdate in the samples, and their catalytic activity for the oxidation of carbon black decreases. In contrast, doping with 1 at % Ag markedly improves the catalytic performance of the molybdate. The synthesized copper molybdate phases are capable of reducing the CO yield in catalytic carbon black combustion. When the process was catalyzed by Co-doped CuMoO4, no carbon monoxide was detected among the combustion products.