Jump to main content
Jump to site search

Volume 208, 2018
Previous Article Next Article

The deposition of metal nanoparticles on carbon surfaces: the role of specific functional groups

Author affiliations

Abstract

The enormous complexity of a typical heterogeneous catalyst makes understanding the development and properties of any active nanoparticles present extremely challenging. In the case of carbon based catalysts that difficulty is compounded by the variability of the carbon powders used. We have previously developed a strategy that addresses these problems by mimicking the catalyst preparation conditions very closely but using highly ordered pyrolytic graphite crystals (HOPG) as a model surface. This enables us to examine the effects of specific functional groups on nanoparticle formation. We report here an extension of our work characterising functional groups on the HOPG surface, using XPS and AFM to explore the deposition of gold from aqueous solution onto HOPG surfaces treated in a variety of ways to alter the surface functionality. The structure and oxidation state of the resulting nanoparticles depend critically on the nature of the functional groups present and offers some insight into the development of catalysts based on these materials. Hydroxyls are identified as key functional species, reducing gold ions to their metallic state whilst being oxidised themselves to carbonyls. Carbonyls meanwhile promote the nucleation of Au3+, creating a network of islands at the HOPG surface. The results have relevance not only to catalysts using activated carbons but also the new generation of materials based on graphene and carbon nanotubes.

Graphical abstract: The deposition of metal nanoparticles on carbon surfaces: the role of specific functional groups

Back to tab navigation

Publication details

The article was received on 15 Dec 2017, accepted on 10 Jan 2018 and first published on 20 Feb 2018


Article type: Paper
DOI: 10.1039/C7FD00210F
Citation: Faraday Discuss., 2018,208, 455-470
  • Open access: Creative Commons BY license
  •   Request permissions

    The deposition of metal nanoparticles on carbon surfaces: the role of specific functional groups

    B. Bowden, M. Davies, P. R. Davies, S. Guan, D. J. Morgan, V. Roberts and D. Wotton, Faraday Discuss., 2018, 208, 455
    DOI: 10.1039/C7FD00210F

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements