Abstract
In this research study, the impact of adding zirconium oxide to titanium oxide-supported gold systems on photocatalytic hydrogen production was analyzed. The activity was evaluated as a function of the zirconium content, with up to 5 mol.% tested under UV, visible light, and sunlight illumination. It was found that the highest activity was achieved with a 1.75 mol.% zirconium oxide, as measured using reaction rate and quantum efficiency parameters under various illumination conditions. The results showed a quantum efficiency close to 1.9% under sunlight, which represents a substantial improvement of over two orders of magnitude compared to the original titanium system. The addition of zirconium influenced the recombination of charge carriers and boosted photoactivity through the interaction between gold and zirconium.
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