Size effects in photoprocesses on dispersed catalysts

Dina Farin*, John Kiwi, David Avnir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Size effects in several typical photocatalysis reactions on dispersed metals and on dispersed semiconductors are reanalyzed. It is found that the reactions are characterized by a power law relation between activity and size through a typical exponent, DR (the reaction dimension). The DR value provides a measure of the activity-sensitivity to size and, in some cases, on the distribution of active sites. The following reactions are mentioned: hydrogenation and isomerization on binary TiO2/Al2O3 catalysts, hydrogenation of methylacetylene on TiO2, water-alcohol cleavage on Pt/TiO2, and water cleavage on Pt/poly(vinyl alcohol).

Original languageEnglish
Pages (from-to)5851-5854
Number of pages4
JournalJournal of Physical Chemistry
Volume93
Issue number15
DOIs
StatePublished - 1989

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