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Platinum dispersion...
Platinum dispersion measurements for Pt/BaO/Al2O3, NOx storage catalysts
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- DAWODY, JAZAER, 1959 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Eurenius, Lisa, 1977 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Abdulhamid, Hussam, 1974 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Skoglundh, Magnus, 1965 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Olsson, Eva, 1960 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fridell, Erik, 1963 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2005
- 2005
- English.
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In: Applied Catalysis A: General. - : Elsevier BV. - 1873-3875 .- 0926-860X. ; 296:2, s. 157-168
- Related links:
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http://dx.doi.org/10...
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Abstract
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- In this investigation different experimental methods to determine the platinum dispersion of Pt/BaO/Al2O3 NOx storage catalysts are compared. The dispersion of platinum is determined independently using temperature programmed desorption of CO, dissociation of N2O, static volumetric CO and H2 chemisorption, dynamic CO chemisorption and transmission electron microscopy. For Pt/BaO/Al2O3, reproducible results are obtained when the platinum dispersion is determined from N2O dissociation, CO and H2 chemisorption. However, repeated CO-TPD experiments result in decreased amount of desorbed CO, which limits this method to determine platinum dispersion for Pt/BaO/Al2O3 samples. For Pt/Al2O3, similar values for platinum dispersion are obtained for all methods used in the study.In addition to the platinum dispersion investigations, the surface morphology of Pt/BaO/Al2O3 samples and the distribution of different elements are studied using SEM-EDS. The SEM-EDS analyses show that the platinum is evenly distributed over the entire sample surface, while the distribution of barium is more uneven.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Characterization
- CO TPD
- Platinum dispersion
- SEM
- EDS
- TEM
- CO chemisorption
- N2O dissociation
- Barium
- H2 chemisorption
Publication and Content Type
- art (subject category)
- ref (subject category)
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DAWODY, JAZAER, ...
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Eurenius, Lisa, ...
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Abdulhamid, Huss ...
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Skoglundh, Magnu ...
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Olsson, Eva, 196 ...
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Fridell, Erik, 1 ...
- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Chemical Enginee ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
- Articles in the publication
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Applied Catalysi ...
- By the university
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Chalmers University of Technology