Gawthrope, D.E., Lee, A.F. and Wilson, K. (2004) Physicochemical properties of Pt-SO4/Al2O3 alkane oxidation catalysts. Physical Chemistry Chemical Physics, 6 (14). pp. 3907-3914. ISSN 1463-9076
Abstract
A series of sulfated alumina catalysts were synthesised by wet impregnation with sulfate-containing solutions. The degree of surface sulfation and corresponding surface acidity could be readily tuned by varying the molarity of impregnating solution. Strong acid treatments (>0.1 M) induced aluminium-sulfate crystallisation with a concomitant decrease in porosity and surface acidity. Platinum-doped sulfated aluminas showed enhanced activity towards methane, ethane and propane combustion. Activity scaled with the degree of accessible surface sulfate and platinum loading, however C–H bond scission appeared rate-limiting over both pure and presulfated aluminas. The magnitude of sulfate-promoted propane oxidation was greatest under heavily oxidising conditions (C3H6O2 > 120) but independent of Pt loading, confirming that support-mediated alkane activation is the dominant factor in the promotional mechanism.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | York RAE Import |
Date Deposited: | 26 Feb 2009 14:26 |
Last Modified: | 26 Feb 2009 14:26 |
Published Version: | http://dx.doi.org/10.1039/b402623c |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/b402623c |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:7172 |