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Antonio Bazzo and Dr. Atsushi Urakawa Origin of Photocatalytic Activity in Continuous Gas Phase CO2 Reduction over Pt/TiO2 ChemSusChem 6

Article first published online: 26 AUG 2013 | DOI: 10.1002/cssc.201300307

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Always look on the dark side of life! Two distinct activities, steady-state and transient, in the continuous photocatalytic reduction of humidified gaseous CO2 to CH4 and H2 over Pt/TiO2 under UV irradiation are identified, by monitoring the product concentrations with the time-resolution of seconds by means of mass spectrometry. Reactivation of the transient activity occurs under dark conditions. The reactivation mechanism is explained by performing an in situ diffuse reflectance infrared Fourier transform spectroscopy study.

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