Abstract
Photocatalytic methane oxidation under mild conditions using single-atom catalysts remains an advanced technology. In this work, gold single atoms (Au SAs) were introduced onto TiO(2) nanostructures using a simple method. The resulting performance demonstrated effective conversion of methane into H(2) and C(2) products at room temperature. The as-synthesized Au SA/TiO(2) exhibited a high hydrogen production rate of 2190 μmol g(-1), with selectivity reaching up to 58% under optimized conditions. The methane oxidation mechanism was investigated, revealing a methyl radical pathway for generating value-added chemicals. This research provides a strategy for photocatalytic methane conversion over single-atom-supported photocatalysts.