1974
DOI: 10.1002/aic.690200203
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Abstract: The effect of changing platinum crystallite size from 2.7 to 15.5 nm on the specific catalytic activity in NO reduction by NH3, with and without added O2, was studied over alumina supported platinum catalysts between 423 and 473°K. In the NO‐NH3 system both specific catalytic activity and selectivity to N2 are independent of crystallite size. In the NO‐O2‐NH3 system the specific catalytic activity of the 15.5 nm crystallites is about six times that of the 2.7 nm crystallites. The NO reduction rate shows depend… Show more

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Cited by 25 publications
(8 citation statements)
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“…erable detail at the University of Delaware [45]. The reaction was found to be particle-size independent (structure insensitive), first order in NO, and 1/2 order in NH,.…”
Section: Nh-no Reactionmentioning
confidence: 92%
“…erable detail at the University of Delaware [45]. The reaction was found to be particle-size independent (structure insensitive), first order in NO, and 1/2 order in NH,.…”
Section: Nh-no Reactionmentioning
confidence: 92%
“…The rate expression obtained by the former is one-half order for both NO and NH3. On the other hand, Pusateri et al (1974) derived a rate expression which is first and one-half order for NO and NH3, respectively. The rate equation of Kudo et al leads to a relationship for flow reactors indicating that conversion of NO is dependent on the ratio of the reactant concentrations but not on their individual concentrations.…”
Section: Discussionmentioning
confidence: 99%
“…Hightower arid Kemball (1965) report that in the reaction of p-xylene with deuterium on platinum/silica and platinum/aluminum oxide the ratio of the rates of exchange to the rates of deuteration vary from 10 to 300 as the fraction exposed varies from 0.33 to 0.43. Pusateri et al (1974) suggest that the reduction of nitric oxide by ammonia in an oxygen atmosphere is a structure sensitive reaction, since the rate of reaction increases by a factor of 6 as the fraction exposed decreases by a factor of 6. Boudart et al (1968) have called the hydrogenolysis and isomerization of neopentane a structure sensitive reaction.…”
Section: Chemisorption/titrotion Methods For M E T a L Surfacesmentioning
confidence: 97%