Abstract
The thermal properties of [{Zn(H2O)3(PdOx2)}2(μ-H2O)2] · 4H2O and {(μ-Ox)Pd(μ-Ox)Mn(H2O)3}n · nH2O have been studied in various atmospheres. Zinc forms the intermetallide ZnPd in inert (He) and reductive (H2) atmospheres and a ZnO–PdO oxide mixture in an oxidative (air) atmosphere. Manganese forms MnO–Pd mixtures in an inert atmosphere, experiences deeper oxidation to Mn3O4 in an oxidative atmosphere, and is partially reduced to form the intermetallide Mn3Pd5 in a reductive atmosphere. High catalytic activity in CO photooxidation has been discovered in the Zn-containing sample deposited onto a TiO2 substrate. The XAFS spectroscopy data for the model catalysts make it possible to assume the formation of nanosized palladium particles during the hydrogen reduction of supported precursors.
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