The low pressure reaction of carbon monoxide with nitrogen monoxide in the presence of oxygen on polycrystalline platinum, palladium and rhodium: II. Intrinsic selectivities

Abstract

The selective catalytic reduction of nitrogen monoxide by carbon monoxide in the presence of oxygen has been studied on polycrystalline ribbons of platinum, palladium and rhodium. Intrinsic selectivities have been measured in an open, gradientless system at stationary state in large domains of temperature (250 < ϑ < 600° C) and reactant partial pressures (10 −7 < p i < 5 × 10 −4 mbar). The measured selectivities can partially be interpreted using the experimental results of the study of the binary systems (CO/O 2 or CO/NO) and are in agreement with the generally accepted picture of elementary reaction steps during the CO oxidation on noble metals.