Switching-off toluene formation in the solvent-free oxidation of benzyl alcohol using supported trimetallic Au-Pd-Pt nanoparticles

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He, Qian ; Miedziak, Peter John ; Kesavan, Lokesh ; Dimitratos, Nikolaos ; Meenakshisundaram, Sankar ; Lopez-Sanchez, Jose Antonio ; Forde, Michael M. ; Edwards, Jennifer Kelly ; Knight, David William ; Taylor, Stuart Hamilton ; Kiely, Christopher John ; Hutchings, Graham John (2013)

Trimetallic Au–Pd–Pt nanoparticles have been supported on activated carbon by the sol-immobilisation method. They are found to be highly active and selective catalysts for the solvent-free aerobic oxidation of benzyl alcohol. The addition of Pt promotes the selectivity to the desired product benzaldehyde at the expense of toluene formation. Detailed aberration corrected STEM-XEDS analysis confirmed that the supported particles are indeed Au–Pd–Pt ternary alloys, but also identified composition fluctuations from particle-to-particle which vary systematically with nanoparticle size.
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