Effect of the size of platinum particles on the chemisorption of oxygen
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 87 (8) , 1251-1257
- https://doi.org/10.1039/ft9918701251
Abstract
An unambiguous particle-size effect has been observed in the desorption of oxygen from a faujasite-embedded platinum dispersion with distinctly different and narrow particle-size distributions. A kinetic analysis of the desorption spectra revealed a relative increase in the activation energy for desorption by about 60 kJ mol–1 as the Pt particle size decreased from 5 to 1 nm. A coverage-dependent activation energy has to be assumed for a consistent interpretation of the experimental results.Keywords
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