J. Kaspar et al., NO REDUCTION BY CO OVER RH AL2O3 - EFFECTS OF RHODIUM DISPERSION ON THE CATALYTIC PROPERTIES, Journal of catalysis, 146(1), 1994, pp. 136-143
The effects of variation of the rhodium dispersion on the catalytic re
duction of NO by CO over Rh/Al2O3 catalysts have been investigated. NO
dissociation is promoted by an increase of metal particle size which
results in an enhanced catalytic activity on a turnover basis. However
, the promotional effect of the particle size on the activity strongly
depends on the reaction temperature, since under reaction conditions
the oxidative disruption and reductive agglomeration processes modify
the rhodium particle size. These processes appear to be responsible fo
r changes of the apparent activation energy observed around 500 K. (C)
1994 Academic Press, Inc.