Evidence of surface restructuration on Pt–Rh/C and Pt–Rh–Ni/C nanoparticles applied to ethanol electrooxidation reaction

Catalyst Development for High‐Temperature Polymer Electrolyte Membrane Fuel Cell (HT‐PEMFC) Applications

“…They found that the oxidation reaction pathway selectivity closely depended on the surface composition of the catalyst. [ 157 ] The fuel oxidation selectivity can, therefore, be fine‐tuned via optimizing the elemental ratio of metals during the catalyst synthesis.…”

Rhodium effects on Pt anode materials in a direct alkaline ethanol fuel cell

“…This trend is in fair line with the previous results showing that the Rh content strongly contributes to the activity of the catalyst, and particularly, to the C-C bond cleavage. 17,31,49 Although their distribution is varying depending on the electrocatalyst, the two reported pathways of the EOR must be considered on the Pt x Rh y /C anodes: 26,27,62,63 (i) the acetate formation that involves 4 electrons and keeps the initial skeleton of the molecule. It should be noted that acetaldehyde was not detected in the electrolytic solution.…”

“…3,22 One way to avoid this poisoning effect or at considerably decrease its effect is to combine Pt with other metals such as ruthenium (Ru), iridium (Ir), molybdenum (Mo), nickel (Ni), cobalt (Co), bismuth (Bi), tungsten (W), and rhodium (Rh). 11,20,[22][23][24][25][26][27] These latter elements act as co-catalysts to enhance the EOR rate and the CO tolerance of Pt, which has been explained by a bifunctional mechanism or an electronic effect. 3 Rh is reported to be an active co-catalyst in the C-C bond cleavage during the EOR.…”

Boosting ethanol electrooxidation at RhBi alloy and Bi2O3 composite surfaces in alkaline media

“…10,32 Recently, since R. Adzic et al first employed it as an important co-catalytic component in the Pt/Rh/SnO 2 catalyst, 33,34 Rh has been discovered to be a potential highly effective alternative EOR catalyst. Then, several Rh-containing catalysts, including PtRh nanowires, 35 porous PdRh nanobowls, 36 Pt–Pd–Rh nanocrystals, 37 Pd–Rh–Te nanotubes, 38 and Pt–Rh–Ni/C nanoparticles, 39 were reported and show significant EOR catalytic performance. After that, Rh-based EOR catalysts such as Rh/C, 40 Rh–CeO 2 /C, 41 penta-twinned Rh nanobranches, 42 Rh–NiO, 43 and SnO 2 –Rh 44 were successively prepared.…”