Methanol Electrooxidation on PtM/C (M = Ni, Co) and Pt/(SnO2/C) Catalysts

Methanol, Ethanol, and Formic Acid Oxidation on New Platinum-Containing Catalysts

“…The choice of these two different techniques for the metal nanoparticles deposition is conditioned both by the desire to obtain catalysts with a high ESA (small NP's size) and the need for joint reduction of the copper and platinum precursors, so that bimetallic PtCu nanoparticles are formed. We also take into account the results of the previous studies, which have confirmed the efficiency of the MOR catalysts with the similar compositions, obtained by the same methods [32][33][34][35]. Note, it is the composition and the structure of the catalysts, but not the preparation method used, that directly affect their behavior.…”

“…The study showed that PtCu/C catalyst exhibits higher activity in the reactions of electrooxidation of organic substances in comparison with Pt/C at high potentials, while the Pt/(SnO 2 /C) catalyst is the most active among the studied samples and is tolerant to the resulting intermediates under conditions where electrooxidation occurs at a potential of 0.60 V. The reasons for the increased activity of Pt/(SnO 2 /C) and PtCu/C catalysts compared to Pt/C in MOR were previously discussed in [32,33,44] and [33][34][35], respectively. The presence of Pt and SnO 2 nanoparticles attached to the surface of a carbon support can facilitate the implementation of a bifunctional catalysis mechanism by facilitating the adsorption of hydroxyl groups on the surface of tin dioxide nanoparticles and their participation in the conversion of CO molecules (an intermediate product of organic substances oxidation) on the surface of neighboring platinum nanoparticles.…”

“…A more correct approach seems to be appropriate when the activity of bimetallic catalysts is studied under the same experimental conditions and compared to that of a certain standard, for which a well-known commercial Pt/C catalyst could be chosen. In our previous works we studied the influence of the nanostructured tin oxide content in Pt/(SnO 2 /C) [32,33], the nature of the alloying component in PtM/C (where M = Ni, Cu) [33][34][35][36] and acid treatment conditions of PtCu/C catalysts [34,35] on the activity of platinum-containing catalysts in the reactions of methanol electrooxidation and oxygen electroreduction. These two types of catalysts are in good agreement with the two previously mentioned approaches aimed at increasing the platinum activity in electrooxidation reactions of simple organic substances: By alloying the metal itself or by using a composite metal oxide support.…”