Abstract
The influence of hydrogen-containing molybdenum and tungsten bronzes on the catalytic activity of palladium composite catalysts for the oxidation of H2, CO, and CH4 was studied. It was found that the composite catalysts containing HxMO3 phases (M = W or Mo), which were formed by the reduction of MoO3 and WO3 oxides with hydrogen in the presence of deposited Pd, showed higher catalytic activity in the oxidation of small molecules (H2, CO, and CH4) with excess oxygen than the traditional Pd/Al2O3 deposited catalyst with the same content of the deposited metal. It was shown that the thermal stability of the HxMO3 phases was the limiting factor influencing the activity of these composite catalysts.
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