Transient Bimodal Particle Size Distributions during Pt Sintering on Alumina and Silica Full article
Journal |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
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Output data | Year: 2015, Volume: 119, Number: 2, Pages: 989-996 Pages count : 8 DOI: 10.1021/jp506586g | ||||||
Tags | Alumina; Particle size; Platinum; Silica; Sintered alumina; Sintering; Size distribution; Transmission electron microscopy | ||||||
Authors |
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Affiliations |
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Funding (1)
1 | Chalmers University of Technology |
Abstract:
Sintering of Pt nanoparticles dispersed on alumina and two types of silica supports has been investigated under oxidizing conditions by use of transmission electron microscopy. Particle size distributions have been measured and analyzed as a function of time (up to 24 h) and temperature (500, 550, and 600 degrees C). The measurements reveal transient bimodal and (sometimes) multimodal size distributions as the particles grow from 3 nm to about 10 nm. The likely role of support surface heterogeneity in the formation of bimodal size distributions has been analyzed theoretically. The experiments and the theoretical analysis stress limitations of conventional sintering models that operate with a mean particle size and a uniform support surface. Furthermore, the results underline the difficulties in deducing the dominant sintering mechanism from particle size distributions.
Cite:
Tabib Zadeh Adibi P.
, Zhdanov V.P.
, Langhammer C.
, Grönbeck H.
Transient Bimodal Particle Size Distributions during Pt Sintering on Alumina and Silica
The Journal of Physical Chemistry C. 2015. V.119. N2. P.989-996. DOI: 10.1021/jp506586g WOS Scopus РИНЦ
Transient Bimodal Particle Size Distributions during Pt Sintering on Alumina and Silica
The Journal of Physical Chemistry C. 2015. V.119. N2. P.989-996. DOI: 10.1021/jp506586g WOS Scopus РИНЦ
Dates:
Submitted: | Jul 2, 2014 |
Accepted: | Dec 16, 2014 |
Published print: | Dec 17, 2014 |
Published online: | Jan 6, 2015 |
Identifiers:
Web of science | WOS:000348094000014 |
Scopus | 2-s2.0-84921279943 |
Elibrary | 23966342 |
Chemical Abstracts | 2014:2132045 |
Chemical Abstracts (print) | 162:125890 |
OpenAlex | W2082012274 |