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Issue 4, 2009
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Applications of a high performance platinum nanocatalyst for the oxidation of alcohols in water

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Abstract

Nanoparticles of platinum (NP-Pt), have been synthesized by supporting high nuclearity anionic carbonyl cluster (Chini cluster) on a water soluble anion exchanger, and the performance of this material, 1, as an oxidation catalyst for alcohols in water has been studied. The E-factor for the synthesis of NP-Pt by this method has been calculated and compared with that of other NP-Pt recently reported in the literature. With 1 as a catalyst, oxidations of a variety of primary and secondary alcohols by dioxygen are achieved and high turnover numbers and selectivities are obtained. The performances of 1 in the oxidation of benzyl alcohol and 1-phenylethanol are compared with those of three other platinum catalysts. These are platinum nanoparticles 2 prepared by the hydrogen reduction of [PtCl6]2 supported on the same water soluble polymer, 5% Pt on carbon, and 5% Pt on alumina, designated as 3 and 4, respectively. 1 has been found to be considerably more active than 2–4 and also other reported water soluble platinum nanocatalysts. After many turnovers (∼1000 and ∼165 for benzyl alcohol and 1-phenyl ethanol, respectively) partial deactivation (∼ 40%) is observed, but the deactivated catalyst can be fully regenerated by treatment with dihydrogen. The TEM data of fresh, deactivated and regenerated 1 show a correlation between the particle size and activity. A mechanism consistent with this and other experimental observations including XPS data is proposed.

Graphical abstract: Applications of a high performance platinum nanocatalyst for the oxidation of alcohols in water

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Publication details

The article was received on 11 Sep 2008, accepted on 12 Jan 2009 and first published on 17 Feb 2009


Article type: Paper
DOI: 10.1039/B815948C
Citation: Green Chem., 2009,11, 554-561
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    Applications of a high performance platinum nanocatalyst for the oxidation of alcohols in water

    P. Maity, C. S. Gopinath, S. Bhaduri and G. K. Lahiri, Green Chem., 2009, 11, 554
    DOI: 10.1039/B815948C

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