Operando IR spectra (IMAGE)

National Institutes of Natural Sciences

Operando IR spectra

Caption

Fig. 2. (a) Time evolution of operando infrared (IR) spectra in the O–H stretching region for Pt/Ga2O3 photocatalysts under ultraviolet irradiation at a CH4 pressure of 30 kPa and a D2O pressure of 2 kPa. The O–H peak growth indicates the hydrogen abstraction on catalyst surfaces by photoactivated interfacial water species (CH4(gas) + •OD(ad) → •CH3(ad) + HDO(ad)). (b) Growth rate of the O–H peak (left axis) and CH4 total conversion rate (right axis) on the Pt/Ga2O3 photocatalysts as functions of methane partial pressure; there is a good correlation between the two plots.

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NINS/IMS

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