Supported Gold Nanoparticles as Efficient Catalysts in the Solventless Plasmon Mediated Oxidation of sec-Phenethyl and Benzyl Alcohol

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• 作者：Geniece L. Hallett-Tapley ; M. Jazm铆n Silvero ; Carlos J. Bueno-Alejo ; Mar铆a Gonz谩lez-B茅jar ; Christopher D. McTiernan ; Michel Grenier ; Jos茅 Carlos Netto-Ferreira ; Juan C. Scaiano
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：June 13, 2013
• 年：2013
• 卷：117
• 期：23
• 页码：12279-12288
• 全文大小：420K
• 年卷期：v.117,no.23(June 13, 2013)
• ISSN：1932-7455

文摘

Surface plasmon excitation of supported gold nanoparticles in the presence of H₂O₂ leads to selective oxidation of sec-phenethyl and benzyl alcohols to the carbonyl products acetophenone and benzaldehyde, respectively, in the absence of additional solvents. Light-emitting diodes are compared with microwave irradiation as excitation sources. Hydrotalcite, ZnO, and Al₂O₃ have been chosen as the solid supports. The overall efficiency of the alcohol oxidation was found to be largely dependent on the nature of the support, with hydrotalcite-derived nanocomposites giving the highest conversions to product, yielding 90% acetophenone after 40 min of LED irradiation. The mechanism for plasmon-mediated alcohol oxidation is believed to involve a significant contribution from the support itself, with adsorption of the alcohol substrate and progression of the oxidation reaction being largely facilitated by the basicity of the support used.