ИСТИНА

Ceria is a promising alternative for precious metal catalysts in oxidation processes due to its unique redox properties, relatively high thermal stability, and low cost. Such catalysts are promising for preferential CO oxidation (PROX-CO) required for effective CO removal from H 2 -rich streams below the 10−100 ppm of CO-tolerance level accepted for proton exchange membrane fuel cells. The catalytic performance of such oxide systems can be tuned using additives improving textural and structural properties, and by addition of a second active component. In our work we used silica as a texture stabilizer, and CuO x or MnO x as a second active component to investigate the effect of the addition and the nature of the modifier on the catalytic efficiency in PROX-CO.