Synergism in the reaction of CO with O2on bimetallic Rh[ndash ]Pd catalysts supported on silica

Rh1−xPdxnanoparticle composition dependence in CO oxidation by oxygen: catalytic activity enhancement in bimetallic systems

“…Consequently, the synergetic effect must be due to interaction between Rh and Pd or their adsorbates. These results are consistent with previous studies, which found synergistic behavior in Rh-Pd catalysts prepared by sequential impregnation and co-impregnation 7,16,22,23 and lower ignition temperature for Rh nanoparticle catalysts as compared to Pd nanoparticle catalysts studied in similar conditions. [23][24][25] Previous studies also determined that synergism does not occur in physical mixtures in this system.…”

“…These catalysts often exhibit increased activity, favorable selectivity, and reduced rates of deactivation. [1][2][3][4][5][6][7][8][9] For example, one recent study by Stamenkovic et al on a Pt 3 Ni(111) single crystal in the oxygen reduction reaction demonstrated a 10-fold enhancement in catalytic activity over the corresponding Pt(111) surface. 1 This effect was determined to be a result of compositional oscillation in the top three layers of the catalysts.…”

Enhanced catalytic activity of inhomogeneous Rh-based solid-solution alloy nanoparticles

“…Similarly, the synergistic effects of core–shell RhPd particles was also demonstrated by Araya and Díaz, who concluded that the synergetic effects heavily depended on the distribution of Rh and Pd on the particle surface. 38 On the other hand, Kusada et al reported that RuPd solid-solution alloy NPs showed outstanding catalytic activity compared with those of pure Ru and Pd. 19 The authors claim that the improved catalytic activity was caused by the presence of defect sites in the alloy particles composed of fcc and hcp crystal structures.…”

Interaction of Rhodium with Chloro-Complexes of Palladium at Elevated Temperatures

“…Rh-Pd биметаллические катализаторы более активны в реакциях окисления СО по сравнению с аналогичными монометаллическими катализаторами в идентичных реакционных условиях благодаря повышенной способности родия расщеплять О 2 и тенденции палладия избирательно связывать СО [1].…”