Home – Home – Jornals – Chemistry for Sustainable Development 2005 number 6

Comparative investigation of the activity of synthesized deposited Cu,Ñî/Y_xCe_yZr_1-x-yO₂ and Au-, Pt-containing catalytic systems in the reaction of a low-temperature selective CO oxidation in hydrogen-containing gas mixtures had been conducted. It had also been demonstrated that these systems provide a high CO conversion level and selectivity with respect to Î₂ in an interval of temperatures up to 150^oC. It has been found that Au-containing catalyst is of the highest activity. The activity and selectivity of nanocrystalline Cu/Y_xCe_yZr_1-x-yO₂ catalysts in the mentioned reaction is higher as compared to Pt-containing catalysts, and they are comparable with an Au containing sample in their selectivity. It had been demonstrated that the use of these catalysts makes it possible to reach the degree of hydrogen cleansing from CO to the level of about 15 ppm, which meets the for fuel cells requirements.