Bimetallic Pt0.5Co0.5/SiO2 Catalyst: Preparation, Structure, and Properties in Preferential Oxidation of Carbon Monoxide

The Pt0.5DD 3/4 (0.5)/SiO2 catalyst has been prepared by the decomposition of a [Pt(NH3)(4)][Co(C2O4)(2)(H2O)(2)]. 2H(2)O binary complex salt supported in the pores of SiO2 pellets. It has been shown by a complex of physical and chemical methods that Pt0.5DD 3/4 (0.5)/SiO2 contains alloy nanoparticles with an average composition Pt0.5Co0.5. The catalytic properties of Pt0.5DD 3/4 (0.5)/SiO2 are studied in the preferential oxidation of DD in the reaction mixtures with various compositions. It was found that Pt0.5DD 3/4 (0.5)/SiO2 has a high selectivity and makes it possible to decrease the outlet concentration of CO to a level of < 10 ppm, and the presence of DD2 and/or De(2)D in the reaction mixture almost does not affect its catalytic properties. The structure of the catalyst is stable under the conditions of preferential CO oxidation.