Electro-oxidation of CO and methanol on graphite-based platinum electrodes combined with oxide-supported ultrafine gold particles

Electrocatalytic activity of nanosized Pt alloys in the methanol oxidation reaction

“…Such enhancement can only be obtained by modification of the structure and the nature of the electrode. Improvements on the rates of methanol oxidation can be achieved by alloying Pt with other metals [1], like Ru [2,3], Ir [4], Au [5] and Sn [6]. Some mechanisms have been proposed to explain this enhancement: (i) modification of the electronic properties of the base metal, (ii) bifunctional mechanism, where the second metal facilitates the oxidation of the strongly adsorbed residue and (iii) the third body effect [7].…”

Graphite Electrodes Modified with Platinum‐Nickel Nano‐Particles for Methanol Oxidation

“…Therefore, the surface concentration of adsorbed hydroxyl radicals would increase, thus increasing the oxidation rate [44]. Many authors have stated that the deactivation of the oxidation reaction at graphite based platinum electrodes modified with metal oxides is not due to the formation of CO itself but other CO like poisoning species [45]. Platinum-nickel catalysts show the best tolerance for carbon monoxide, where their performance was unquestionably superior to that of Pt-Ru catalysts.…”

Combinatorial investigation of Pt–Ru–M as anode electrocatalyst for direct methanol fuel cell

“…This indicates that Au/TiO 2 helped the platinum for methanol electro-oxidation. It has been well known that the CO or COlike substances produced on the Pt surface act as self-poisons during the electro-oxidation of methanol [27]. Au/TiO 2 might be effective to the decomposition of these deactivating species at room temperature to improve the activity of electro-oxidation of methanol.…”