Application of halohydrocarbons for the re-dispersion of gold particles

Kevin Morgan*, Robbie Burch, Muhammad Daous, Juan Jose Delgado, Alexandre Goguet, Christopher Hardacre, Lachezar A. Petrov, David W. Rooney

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

Methods to control the dispersion of gold in supported heterogeneous catalysts are very valuable due to the strong nanoparticle size dependence on their activity and selectivity towards many reactions. Additionally, the ability to disperse large, inactive gold nanoparticles to smaller nanoparticles provides an opportunity to reactivate, stabilise and increase the lifetime of gold catalysts making them more practical for industrial applications. Previously it has been demonstrated that the use of gas phase iodomethane (J. Am. Chem. Soc., 2009, 131, 6973; Angew. Chem., Int. Ed., 2011, 50, 8912) was able to re-disperse gold from >20 nm particles to dimers and trimers. In the current work, we show that this technique can be applied using less hazardous halohydrocarbons treatments, both in the gas phase and the liquid phase. The ability of these individual halohydrocarbons to re-disperse gold as well as the extent to which leaching occurs is assessed.

Original languageEnglish
Pages (from-to)729-737
Number of pages9
JournalCatalysis, Science & technology
Volume4
Issue number3
Early online date02 Jan 2014
DOIs
Publication statusPublished - 2014

Keywords

  • SUPPORTED GOLD
  • CATALYTIC-ACTIVITY
  • OXIDATION
  • CARBON

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