CO Oxidation over Bimetallic Au–Pd Supported on Ceria–Zirconia Catalysts: Effects of Oxidation Temperature and Au:Pd Molar Ratio

Au–Pd supported on ceria–zirconia catalysts, with Au:Pd molar ratios in the 1:1–10:1 range, have been prepared using deposition precipitation of Au followed by impregnation with Pd. The resulting Au–Pd supported catalysts were activated by oxidation at 350, 450 and 700 °C. The oxidation at 700 °C le...

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Veröffentlicht in:	Catalysis letters 2016, Vol.146 (1), p.144-156
Hauptverfasser:	Olmos, Carol M., Chinchilla, Lidia E., Delgado, Juan J., Hungría, Ana B., Blanco, Ginesa, Calvino, Jose J., Chen, Xiaowei
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Bimetals Carbon monoxide Catalysis Catalysts Catalytic activity Cerium Cerium oxides Chemistry Chemistry and Materials Science Gold Gold base alloys Industrial Chemistry/Chemical Engineering Nanoalloys Nanoparticles Organometallic Chemistry Oxidation Oxidation-reduction reactions Palladium Palladium catalysts Physical Chemistry Precipitation (Meteorology) Zirconium Zirconium dioxide Zirconium oxide
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Zusammenfassung:	Au–Pd supported on ceria–zirconia catalysts, with Au:Pd molar ratios in the 1:1–10:1 range, have been prepared using deposition precipitation of Au followed by impregnation with Pd. The resulting Au–Pd supported catalysts were activated by oxidation at 350, 450 and 700 °C. The oxidation at 700 °C led to the formation of large Au–Pd alloy nanoparticles showing lower catalytic activity for CO oxidation. The Au–Pd/Ce 0.62 Zr 0.38 O 2 catalyst with the highest Au:Pd ratio, 10:1, exhibited the highest CO oxidation activity. Graphical Abstract
ISSN:	1011-372X 1572-879X
DOI:	10.1007/s10562-015-1641-1