Palladium doped manganese dioxide catalysts for low temperature carbon monoxide oxidation

Nano-sized palladium doped manganese dioxide catalysts with varying compositions were prepared by the co-precipitation method. Palladium doped manganese dioxide catalysts show markedly enhanced CO oxidation activity, and CO conversion even at 35 degrees C. Strong interaction occurs between palladium and manganese dioxide which results in high catalytic activity and total CO conversion occurs at a lower temperature. Activity test carried out at fixed temperature indicate that the catalysts retain their activity with increasing time. The moisture influenced the catalytic activities considerably. The SEM study shows that particles are nano-sized and almost spherical in shape. (C) 2009 Elsevier B.V. All rights reserved.