WFRF:(Simonsen S.)
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- Simonsen, S. B.Haldor Topsoe,Danmarks Tekniske Universitet,Technical University of Denmark (author)
Ostwald ripening in a Pt/SiO2 model catalyst studied by in situ TEM
- Article/chapterEnglish2011
Publisher, publication year, extent ...
- Elsevier BV,2011
Numbers
- LIBRIS-ID:oai:research.chalmers.se:91edc2d4-33c1-4ded-a50a-7a7703af67c8
- https://research.chalmers.se/publication/143904URI
- https://doi.org/10.1016/j.jcat.2011.04.011DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- Sintering of Pt nanoparticles dispersed on a planar SiO(2) support was studied by in situ transmission electron microscopy (TEM). A time-lapsed TEM image series of the Pt nanoparticles, acquired during the exposure to 10 mbar synthetic air at 650 degrees C, reveal that the sintering was governed by the Ostwald ripening mechanism. The in situ TEM images also provide information about the temporal evolution of the Pt particle size distribution and of the growth or decay of the individual nanoparticles. The observed Pt nanoparticle changes compare well with predictions made by mean-field kinetic models for ripening, but deviations are revealed for the time-evolution for the individual nanoparticles. A better description of the individual nanoparticle ripening is obtained by kinetic models that include local correlations between neighboring nanoparticles in the atom-exchange process.
Subject headings and genre
- NATURVETENSKAP Kemi hsv//swe
- NATURAL SCIENCES Chemical Sciences hsv//eng
- platinum/silica catalysts
- p19
- size
- Sintering
- gamma-al2o3
- en m
- In situ TEM
- lean m
- p2401
- critical radius
- 1988
- p348
- 1971
- 1967
- transmission electron-microscopy
- 1978
- thin-films
- distributions
- cabe rw
- Pt
- oxidation
- Catalyst deactivation
- v55
- Nanoparticles
- v6
- mechanisms
- v28
- p354
- akrave.bk
- supported metal-catalysts
- v114
- 2-dimensional islands
- Ostwald ripening
Added entries (persons, corporate bodies, meetings, titles ...)
- Chorkendorff, I.Danmarks Tekniske Universitet,Technical University of Denmark (author)
- Dahl, S.Danmarks Tekniske Universitet,Technical University of Denmark (author)
- Skoglundh, Magnus,1965Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)skoglund (author)
- Sehested, J.Haldor Topsoe (author)
- Helveg, S.Haldor Topsoe (author)
- Haldor TopsoeDanmarks Tekniske Universitet (creator_code:org_t)
Related titles
- In:Journal of Catalysis: Elsevier BV281:1, s. 147-1550021-95171090-2694
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- NATURAL SCIENCES
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- Chalmers University of Technology
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