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New gold catalysts for liquid phase oxidation

Abstract

A pre-requisite for good catalytic activity with supported gold is that the metal is present as nanoparticles, but no suitable method for depositing gold on carbon as nanoparticles has previously been reported. The deposition precipitation method which has been used successfully for catalyst preparation with other supports, produces large aggregates with carbon. It is now shown, however, that pre-reduced gold sol is a satisfactory method for preparing gold on carbon catalysts as long as an appropriate choice of sol is made. In this paper the activity of gold on carbon catalysts prepared in a number of different ways is compared in a standardized liquid phase organic oxidation reaction. The activity for Au/C catalysts prepared by the sol method can show a two-fold increase compared with a similar catalyst prepared by deposition precipitation.

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Additional information

About the authors Laura Prati is a researcher in the Inorganic Chemistry Department at the University of Milan. She is a graduate in Chemistry (1983), and received her specialization in ‘Tecniche Analitiche per la Chimica Organica Fine’ from the Politecnico of Milan in 1985 and was awarded a PhD in Industrial Chemistry in 1988. Her main interests are in studying catalytic hydrogenation and oxidation reactions.

Gianmario Martra works as a researcher in the Department of Inorganic, Physical and Materials Chemistry at the University of Turin. He graduated in Chemistry (1989), and received his PhD in Physical Chemistry in 1993. His research is in the field of surface structure, adsorptive properties and catalytic activity of dispersed solid materials (oxides, supported metals, micro and mesoporous materials).

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Prati, L., Martra, G. New gold catalysts for liquid phase oxidation. Gold Bull 32, 96–101 (1999). https://doi.org/10.1007/BF03216617

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Keywords

  • Gold Particle
  • Gold Catalyst
  • Liquid Phase Oxidation
  • Carbon Catalyst
  • Deposition Precipitation