CO2 Splitting by H2O to CO and O2 under UV Light in TiMCM-41 Silicate Sieve
نویسندگان
چکیده
The 266 nm light-induced reaction of CO2 and H2O gas mixtures (including isotopic modifications CO2, CO2, and D2O) in framework TiMCM-41 silicate sieve was monitored by in-situ FT-IR spectroscopy at room temperature. Carbon monoxide gas was observed as the sole product by infrared, and the growth was found to depend linearly on the photolysis laser power. H2O was confirmed as stoichiometric electron donor. The work establishes CO as the single photon, 2electron transfer product of CO2 photoreduction by H2O at framework Ti centers for the first time. O2 was detected as co-product by mass spectrometric analysis of the photolysis gas mixture. These results are explained by single UV photon-induced splitting of CO2 by H2O to CO and surface OH radical.
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