On the Kinetics of Chemisorption

Abstract

Kinetics and dynamics of the trappingmediated dissociative chemisorption of oxygen on Ru (001) The kinetic isotope effect in the dissociative chemisorption of methane

Influence of additives on the Pt metal activity of naphtha reforming catalysts

“…Pioneering works of Boudart on structure sensitivity [31,32] classified catalytic reactions as ''demanding'' (sensitive to morphological structure) and ''facile'' (structure-insensitive), according to the requirement or not of a particular ensemble of neighboring metal atoms in order to form adsorbate bonds with the proper strength. The geometric model has been recently refined as ''ensemble-size'' model [33][34][35] on the assumption that reaction rates are proportional to the probability of finding particular groups of neighboring atoms. Two classical test reactions are used that have an entirely different behavior according to the geometric factor theory: cyclopentane (CP) hydrogenolysis, which is a demanding one [36] and cyclohexane (CH) dehydrogenation which is non-demanding under the experimental conditions used.…”

Influence of Time and Temperature on the Regeneration of PtReIn/Al2O3 Naphtha Reforming Catalysts

“…Therefore, the drastic decrease of the metal activity of the coked catalysts shows that a fraction of coke is deposited on the metallic phase. The hydrogenolysis activity is more affected than the dehydrogenation activity because hydrogenolysis is a demanding reaction while dehydrogenation is a structure insensitive reaction [25][26][27]. The dehydrogenation activity of the PtReIn(0.1) coked catalyst is lower than the activity of the PtReIn(0.3) coked catalyst.…”

Pt-Mg-Ir/Al2O3 and Pt-Ir/HY zeolite catalysts for SRO of decalin. Influence of Ir content and support acidity

“…Demanding reactions would require a particular ensemble of neighboring metal atoms in order to form adsorbate bonds with the proper strength; facile reactions would not. This geometric model has been recently refined to an "ensemble-size" model [64][65][66] on the assumption that reaction rates are proportional to the probability of finding particular groups of neighboring atoms. In this work two classical test reactions are used that have an entirely different behavior according to the geometric factor theory: cyclopentane (CP) hydrogenolysis (demanding reaction) and cyclohexane (CH) dehydrogenation, which is non-demanding at the reaction conditions used.…”