HIGHLY DISPERSED MGO-SUPPORTED MODEL PD-MO CATALYSTS PREPARED FROM BIMETALLIC CLUSTERS - CHEMISORPTION AND SELECTIVE CATALYTIC REDUCTION OFNO

Model supported palladium and palladium-molybdenum catalysts prepared from organometallic precursors and previously characterized by a varie ty of chemical and physical methods were examined by IR spectroscopy o f NO chemisorption and tested for their activities as catalysts in the competitive NO + CO + O-2 reaction. The IR results reveal distinctive behavior of the catalyst made from a bimetallic precursor, and the ac tivity results show that this catalyst is more selective for NO reduct ion than the other catalysts, but its stability is vulnerable to the r eaction conditions. The high selectivity is attributed to Pd-Mo intera ctions, which are inferred to be stronger in the catalyst prepared fro m a bimetallic precursor than in catalysts prepared from monometallic precursors.