Photocatalytic Reforming of Aqueous Methanol Solution Over Platinum-Loaded Titanium Dioxide Composites

Abstract

Photocatalytic reforming of methanol-water systems has gained considerable attention as a sustainable approach for hydrogen generation using solar-driven catalytic processes. The present study investigates the photocatalytic reforming of aqueous methanol solution over platinum-loaded titanium dioxide composites, with emphasis on the influence of catalyst composition, platinum loading, light irradiation, and reaction conditions on hydrogen production efficiency. Titanium dioxide-based photocatalysts were modified with platinum nanoparticles to enhance charge separation, catalytic activity, and photogenerated electron transfer during methanol oxidation and water reduction reactions. Experimental analysis demonstrates that platinum deposition significantly improves photocatalytic performance by reducing electron–hole recombination and increasing active surface reaction sites. The effects of methanol concentration, catalyst dosage, irradiation time, and operating temperature on hydrogen evolution rate and organic conversion efficiency were systematically evaluated. Results indicate that optimized platinum loading and controlled reaction conditions substantially enhance hydrogen generation and photocatalytic stability. The study further reveals that methanol acts as an efficient sacrificial agent, facilitating rapid oxidation pathways and promoting continuous hydrogen production under ultraviolet irradiation. Comparative assessment with unmodified titanium dioxide photocatalysts confirms the superior activity and durability of platinum-loaded composites for solar-assisted reforming applications. In addition, the process demonstrates potential for environmentally sustainable hydrogen production with reduced carbon emissions and improved renewable energy utilization.