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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents



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ID: 430782.0, Fritz-Haber-Institut / Inorganic Chemistry
Au-Pd/AC as catalysts for alcohol oxidation: effect of reaction parameters on catalytic activity and selectivity
Authors:Villa, Alberto; Janjic, Nikolina; Spontoni, Paolo; Wang, Di; Su, Dang Sheng; Prati, Laura
Language:English
Research Context:Carbon
Date of Publication (YYYY-MM-DD):2009-06
Title of Journal:Applied Catalysis A: General
Journal Abbrev.:Appl. Catal. A
Volume:364
Issue / Number:1-2
Start Page:221
End Page:228
Copyright:© 2009 Published by Elsevier B.V.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The oxidation of different alcohols with molecular oxygen in water has been investigated using a range of activated carbon-supported Au-Pd bimetallic catalysts. The effect of the Au-Pd ratio on the conversion and selectivity was observed and a synergistic effect is present in a large range of the Au-Pd ratio, being maximized for Au80-Pd20 composition instead of Au90-Pd10 shown in glycerol oxidation [1]. Moreover the enhancement of conversion observed by adding a base resulted greater for gold-rich catalysts rather than for palladium-rich ones. The effect of the alcohol concentration and the metal/substrate ratio in the presence or the absence of the base was also studied revealing substantial differences in terms of both activity and selectivity. At 1 M concentration under biphasic conditions benzyl alcohol has been selectively oxidized to benzaldehyde (S90=98%) even in the presence of NaOH with a TOF of 18000h-1 using Au60-Pd40/AC as the catalyst.
Free Keywords:Gold – Palladium alloy; Alcohol oxidation
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Micro- and Nanostructure / Carbon
External Affiliations:Università di Milano, Dipartimento di Chimica Inorganica Metallorganica e Analitica, I-20133 Milano, Italy
Identifiers:URL:http://dx.doi.org/10.1016/j.apcata.2009.05.059 [only for subscriber]
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