51. The Influence of Base Metal (M) Oxidation State in Au-M-O/TiO2 Systems on Their Catalytic Activity in Carbon Monoxide Oxidation
- Author
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Małgorzata Zimowska, R. Grabowski, Robert P. Socha, Józef Korecki, Nika Spiridis, K. Samson, and Jan Mizera
- Subjects
inorganic chemicals ,Inorganic chemistry ,chemistry.chemical_element ,lcsh:Chemical technology ,Redox ,Catalysis ,lcsh:Chemistry ,chemistry.chemical_compound ,Oxidation state ,Oxidizing agent ,TiO2 ,heterocyclic compounds ,lcsh:TP1-1185 ,Physical and Theoretical Chemistry ,Base metal ,Dopant ,Chemistry ,organic chemicals ,modifications ,gold ,Copper ,CO oxidation ,lcsh:QD1-999 ,Carbon monoxide - Abstract
Base metal promoted gold/titania catalysts were synthesized, characterized and tested in CO oxidation reaction. Catalysts containing dopant metals in higher oxidation states exhibited higher activity than catalysts containing dopants in reduced states. The activity of fresh catalysts promoted by Cu, Fe and Ni was similar to the unpromoted one, but treatment in reducing and oxidizing atmospheres revealed the supremacy of the copper promoted catalyst. The sequential deposition method proved to be better than the co-deposition—precipitation method. An attempt to explain these differences using XPS, FTIR and H2 TPR was performed.
- Published
- 2011