Feasibility of Methyl Mercaptane as Probe Molecule for Supported Gold Nanoparticle Surface Area Determination

Authors

  • Niels van Vegten
  • Peter Haider
  • Marek Maciejewski
  • Frank Krumeich
  • Alfons Baiker ETH Zürich, Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich

DOI:

https://doi.org/10.2533/chimia.2010.191

Keywords:

Au/tio2, Chemisorption, Methyl mercaptane, Surface area

Abstract

Gold nanoparticles supported on TiO2 were probed by adsorption of methyl mercaptane (MM), and the process was quantified gravimetrically. This method allowed discrimination between weakly adsorbed (physisorbed) and strongly bound (chemisorbed) methyl mercaptane. Strong adsorption of MM occured on exposed Au faces, while low-temperature pre-treatment (30 °C) completely suppressed adsorption of MM on the TiO2 support. The thus obtained high selectivity of MM adsorption on Au enabled characterization of the gold surface area and the resulting values are comparable with other noble metal systems of similar average particle size. The estimated adsorption stoichiometry indicates that the entire Au surface is probed.
CHIMIA Vol. 64 No. 3 (2010): Laureates: Awards and Honors, SCS Fall Meeting 2009

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Published

2010-03-31

Issue

Vol. 64 No. 3 (2010): Laureates: Awards and Honors, SCS Fall Meeting 2009

Section

Scientific Articles

License

Copyright (c) 2010 Swiss Chemical Society

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

[1]
N. van Vegten, P. Haider, M. Maciejewski, F. Krumeich, A. Baiker, Chimia 2010, 64, 191, DOI: 10.2533/chimia.2010.191.