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Vibrational Study o...
Vibrational Study of SOx Adsorption on Pt/SiO2
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- Bounechada, Djamela, 1984 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden Chalmers, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden
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- Darmastuti, Zhafira (författare)
- Linköpings universitet,Tillämpad sensorvetenskap,Tekniska högskolan
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- Andersson, Mike (författare)
- Linköpings universitet,Tillämpad sensorvetenskap,Tekniska högskolan
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- Ojamäe, Lars (författare)
- Linköpings universitet,Kemi,Tekniska högskolan
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- Lloyd Spetz, Anita (författare)
- Linköpings universitet,Tillämpad sensorvetenskap,Tekniska högskolan
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- Skoglundh, Magnus, 1965 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden Chalmers, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden
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- Carlsson, Per-Anders, 1972 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden Chalmers, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden
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(creator_code:org_t)
- 2014-12-04
- 2014
- Engelska.
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Ingår i: Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 118:51, s. 29713-29723
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Abstract
Ämnesord
Stäng
- The formation of ad-SOx species on Pt/SiO2 upon exposure to SO2 in concentrations rang- ing from 10 to 50 ppm at between 200 and 400◦C has been studied by in situ diffuse reflectance infrared Fourier transformed spectroscopy. In parallel, first-principles calculations have been carried out to consolidate the experimental interpretations. It was found that sulfate species form on the silica surface with a concomitant removal/ rearrangement of silanol groups. For- mation of ad-SOx species occurs only after SO2 oxidation to SO3 on the platinum surface. Thus SO2 oxidation to SO3 is the first step in the SOx adsorption process, followed by spillover of SO3 to the oxide and, finally, the formation of sulfate species on the hydroxyl positions on the oxide. The sulfate formation is influenced by both temperature and SO2 concentration. Furthermore, exposure to hydrogen is shown to be sufficiently efficient as to remove ad-SOx species from the silica surface.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Platinum
- Field-Effect Transistor
- Hydrogen
- Ir Spectroscopy
- Silica
- Sulfur-Dioxide
- Surface-Acidity
- Sensor
- Methane
- Combustion
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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