Catalytic reduction of NO with CO on active carbon-supported copper, manganese, and copper-manganese oxides

The catalytic activity of copper, manganese, and copper-manganese oxide cat alysts with respect to NO reduction with CO has been investigated in the te mperature range 25-300 degreesC. Copper-manganese oxide catalysts with Cu:M n ratios of 1:2 and 1:1 where the two metals form spinel-like phases have s hown the highest activity. With the three kinds of catalysts NO reduction p roceeds to NZ formation over the whole temperature range. The texture chang es of the support after heat treatment and the adsorption characteristics o f all samples have been evaluated by means of adsorption studies. Chemical and X-ray phase analyses and EPR investigations have been performed. (C) 20 01 Academic Press.