Activity of SiO2 supported gold-palladium catalysts in CO oxidation

Autor:	V. La Parola, Leonarda F. Liotta, Giuseppe Pantaleo, Zs. Koppány, Anna Maria Venezia, Dóra Horváth, László Guczi, Krisztina Frey, Andrea Beck, Giulio Deganello
Rok vydání:	2003
Předmět:	Process Chemistry and Technology Analytical chemistry chemistry.chemical_element Heterogeneous catalysis Catalysis chemistry X-ray photoelectron spectroscopy Catalytic oxidation Transition metal Chemisorption Bimetallic strip Palladium Nuclear chemistry
Zdroj:	Applied Catalysis A: General. 251:359-368
ISSN:	0926-860X
DOI:	10.1016/s0926-860x(03)00343-0
Popis:	Bimetallic Au-Pd catalysts supported on silica with different Au/Pd atomic ratios were prepared by simultaneous reduction of palladium and gold precursors by ethanol in the presence of the polymer, polyvinylpyrrolidone (PVP). Formation of alloyed particles was detected by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and CO chemisorption measurements. The catalysts were tested in the catalytic oxidation of CO using a plug–flow reactor. The CO conversion was determined as a function of temperature. The monometallic palladium and the palladium-rich catalysts behaved quite similarly and were the most active catalysts. A drastic reduction of the CO oxidation activity was observed for the 50/50 Au/Pd catalyst and for samples with increasing amount of gold.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::89d7ae64d6d858a8deae7ad4cfcd29fc https://doi.org/10.1016/s0926-860x(03)00343-0 Zobrazit plný text záznamu Full Text from ScienceDirect