Strategic Fabrication of Simplified Ternary Alloy Pt_xCu_yCo_z Nanoparticles Supported on Carbon-Free Ti_0.7W_0.3O₂ Nanomaterials for Methanol Oxidation Reaction

Abstract

In the face of a global energy crisis exacerbated by the adverse impacts of fossil fuel consumption, developing costeffective catalysts with robust activity and durability has become paramount. This study introduces a novel catalyst, Pt 6 CuCo/ Ti 0.7 W 0.3 O 2 , designed to address these pressing energy challenges. The approach involves doping cobalt (Co) and copper (Cu) into platinum (Pt), anchored to a Ti 0.7 W 0.3 O 2 substrate, to optimize the electronic structure on the Pt surface. This optimization mitigates the adsorption capacity of oxidized species with Pt, thereby enhancing the methanol electro-oxidation reaction (MOR) activity of the material. Furthermore, this innovation overcomes the limitations associated with carbon-based catalysts, significantly bolstering durability. The Pt 6 CuCo/Ti 0.7 W 0.3 O 2 catalyst exhibits remarkable electrocatalytic properties, including an onset potential, mass activity, and I f /I b ratio of approximately 0.1 vs NHE, 273.38 m 2 g Pt −1 , and approximately 1.85, respectively. These values are in stark contrast to traditional Pt/C catalysts, which yield an onset potential of approximately 0.45 vs NHE, 193.28 m 2 g Pt −1, and an I f /I b ratio of approximately 0.89. The results obtained in this study underscore the immense potential of Pt 6 CuCo/Ti 0.7 W 0.3 O 2 as a catalyst for MOR development, offering a promising solution to address the prevailing energy challenges and environmental concerns associated with conventional fossil fuel sources.