XPS and in-situ IR investigation of Ru/SiO2 catalyst
Journal of Molecular Structure
111 - 114
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Ru(NO)(N0&/Si02 catalyst precursors were characterized via XPS and in-situ reflectance IR spectroscopy before, during and after reduction by hydrogen over the temperature range 300-800 K. IR results indicated that the catalyst precursor lost NO3 groups first, with subsequent loss of NO both in a reducing atmosphere and during thermal annealing. XPS was used to derive information on the oxidation state of Ru in the various steps of the annealing and/or reduction processes. 0 1997 Elsevier Science B.V.