Operando infrared absorption spectra (IMAGE)

National Institutes of Natural Sciences

Operando infrared absorption spectra — Caption

Time evolution of operando infrared spectra in the C–H stretching region for (a) Pt/Ga2O3 and (b) Pd/Ga2O3 photocatalysts under ultraviolet light irradiation at methane and water pressure of 30 and 2 kPa, respectively. The appearance of the C–H peaks on Pt/Ga2O3 demonstrates methane oxidation taking place on its surface. No C–H peaks on Pd/Ga2O3 indicates the low population of the hydrocarbon intermediates due to the desorption of the methyl radical intermediate.

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Toshiki Sugimoto

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