Journal article
Oxidation of methane on nanoparticulate Au/TiO2 at low temperature: A combined microreactor and DFT study
Department of Physics, Technical University of Denmark1
Department of Micro- and Nanotechnology, Technical University of Denmark2
Surface Physics and Catalysis, Department of Physics, Technical University of Denmark3
Center for Individual Nanoparticle Functionality, Centers, Technical University of Denmark4
Center for Nanoteknologi, Centers, Technical University of Denmark5
Herein we present results from experimental and theoretical studies concerning low temperature oxidation of CH4 over TiO2 supported Au nanoparticles. Our findings suggest that partial oxidation cannot be achieved under these conditions (1 bar, 30–250 °C). In order to understand this further, results from CO and H2 oxidation studies are also presented.
The reaction rate for CH4 oxidation is found to be far lower than the rate for both CO and H2 oxidation, this goes towards explaining the strong tendency for total CH4 oxidation. These findings are further corroborated by DFT-calculations investigating the thermodynamics of CH4 oxidation on a stepped Au(2 1 1) surface.
Keywords: Gold; Titanium dioxide; Catalysis; Microreactor; Methane; Oxidation; Particle size
| Language: | English |
|---|---|
| Year: | 2009 |
| Pages: | 24-29 |
| ISSN: | 18734308 and 09205861 |
| Types: | Journal article |
| DOI: | 10.1016/j.cattod.2009.01.007 |
| ORCIDs: | Horch, Sebastian |
