Gold versus Platinum on Ceria-Zirconia Mixed Oxides in Oxidation of Ethanol and Toluene

0365738 - ÚCHP 2012 RIV NL eng J - Článek v odborném periodiku
Gaálová, Jana - Topka, Pavel - Kaluža, Luděk - Šolcová, Olga
Gold versus Platinum on Ceria-Zirconia Mixed Oxides in Oxidation of Ethanol and Toluene.
Catalysis Today. Roč. 175, č. 1 (2011), s. 231-237. ISSN 0920-5861. E-ISSN 1873-4308
Grant CEP: GA ČR GPP106/10/P019; GA ČR GAP106/11/0902; GA MPO FR-TI1/059
Výzkumný záměr: CEZ:AV0Z40720504
Klíčová slova: cerium * zirconium * gold
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 3.407, rok: 2011

The Ce-Zr mixed oxides, prepared by the sol-gel method, have been examined as supports for platinum and gold in deep oxidation of ethanol and toluene. A weight ratio of Ce/Zr in the synthesized supports was 1/1. Two supported noble metals with a different loading (2.5 and 0.3 wt. %) were compared to each other as well as to selected industrial catalysts (HHC-5557 and VOC-1544). New platinum catalysts showed better activity in oxidation of ethanol and toluene than their gold homologues. Furthermore, they were comparable or even more active than industrial samples (50 % conversion of ethanol was achieved with 2.5Pt/CeZr at 99 °C). On the other hand, gold catalysts proved the best selectivity in oxidation of both model molecules from all tested samples. The additional contributions of present article are the characterizations of catalysts such as XRD, TPR-TPD or FE-SEM.
Trvalý link: http://hdl.handle.net/11104/0200910