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 language | English |
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Pages (from-to) | 5851-5854 |
Number of pages | 4 |
Journal | Journal of Physical Chemistry |
Volume | 93 |
Issue number | 15 |
DOIs | |
State | Published - 1989 |