Size effect study of carbon monoxide oxidation by Rh surfaces

Modelling of local aging effects of commercial three‐way catalysts: Spatial temperature and CO conversion profiles

“…Figure presents the split of the measured total F cat/geo value (see section “Low temperature CO chemisorption”) to the palladium part and the rhodium part for simulation. In accordance with the literature, the bimetallic system exhibited changed reaction activity as a result of synergetic effects due to the interaction between Pd and Rh or their adsorbates. The observed synergetic behaviour in Pd/Rh catalysts is related to the noble metal composition, the structure of the catalyst surface, and the O 2 :CO ratio.…”

Characterization of Pt/SiO2 Model Catalysts at UHV and Near Atmospheric Pressures

“…Under conditions which facilitate higher O 2 coverages (e.g., high O 2 /CO conditions or high temperatures), CO 2 production rates have been reported to exhibit structure sensitivity. The existence of structure sensitive behavior has been supported by measurements probing high temperature and/or high O 2 /CO conditions on Pt technical catalyst samples [29][30][31], and has been observed in low pressure measurements [12,[38][39][40] of Pt-group metal single crystal and model catalyst surfaces. The reactivity and nature of Pt-group metal surfaces under high O 2 /CO conditions at elevated pressures has been the subject of recent debate and remains an active area of study [20][21][22][41][42][43][44][45].…”

CO oxidation on stepped Rh[n (111)×(111)] single crystal electrodes: a voltammetric study

“…In UHV experiments the oxidation reaction of CO with O 2 on rhodium was found to be a structure sensitive [17,19,22,28] Langmuir-Hinshelwood type reaction [11,16,22,29]. Molecular oxygen was found to adsorb dissociatively, yielding atomic oxygen, which is mostly immobile on the surface, while the adsorbed CO remains mobile on the surface [14].…”