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标题：Catalytic activity of bimetallic AuPd alloys supported MgO and MnO 2 nanostructures and their role in selective aerobic oxidation of alcohols
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作者：Hamed Alshammari ; Hamed Alshammari ; Mosaed Alhumaimess 等
期刊名称：Journal of King Saud University - Science
印刷版ISSN：1018-3647
出版年度：2017
卷号：29
期号：4
页码：561-566
DOI：10.1016/j.jksus.2017.03.003
语种：English
出版社：Elsevier
摘要：AbstractThe use of metal oxides as supports for gold and palladium (Au-Pd) nano alloys constitutes new horizons to improve catalysts materials for very important reactions. From the literatures, Pd-based bimetallic nanostructures have great properties and active catalytic performance. In this study, nanostructures of magnesium oxide (MgO) and manganese dioxide (MnO₂) were synthesised and utilized as supports for Au-Pd nanoparticle catalysts. Gold and palladium were deposited on these supports using sol-immobilisation method. The MgO and MnO2supported Au-Pd catalysts were evaluated for the oxidation of benzyl alcohol and 1-octanol, respectively. These catalysts were found to be more selective, active and reusable than the corresponding monometallic Au and Pd catalysts. The effect of base supports on the disproportionation reaction during the oxidation process was investigated. The results show that MgO stopped the disproportionation reaction for both aromatic and aliphatic alcohols while MnO₂ stopped it in the case of benzyl alcohol only. The outcomes of this work shed light on the selective aerobic oxidation of alcohols using bimetallic Au-Pd nanoalloys and pave the way to a complete investigation of more basic metal oxides for various aliphatic alcohols.
关键词：Aerobic oxidation;Nano gold catalysis;Metal oxide;Oxidation of alcohol