In the present investigation, we have explored the preparation of Pt x Ru 1-x -NiTiO 3 hybrid electrocatalysts for the application of methanol oxidization. The XRD and Raman analysis of Pt x Ru 1-x -NiTiO 3 confirmed the rhombohedral crystal structure of NiTiO 3 and cubic-structured Pt(Ru) nanoparticles. TEM analysis signifies that Pt(Ru) nanoparticles is decorated on the surface of the NiTiO 3 . The mean size of the Pt(Ru) nanoparticles calculated from the TEM profile is around 2 nm which corroborates with the crystallite size estimated from XRD. The XPS analysis confirms the presence of metallic Pt along with its oxidized components (Pt 2+ and Pt 4+ ). The cyclic voltammetry analysis evidence that Pt 0.5 Ru 0.5 -NiTiO 3 has shown better activity in methanol oxidation compared with the other compositions of Pt x Ru 1−x -NiTiO 3 along with the maximum current density of 65.41 mA cm −2 with less carbon poisoning. Chronoamperometry and polarization studies represent the stability and electrochemical activity of the Pt 0.5 Ru 0.5 -NiTiO 3 electrocatalysts towards methanol oxidation. Based on the research carried out in this work, it is concluded that the Pt x Ru 1−x -NiTiO 3 would be a promising candidate as an electrocatalyst for methanol oxidation in direct methanol fuel cells.
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Chellasamy et al. (2024) studied this question.
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