Open AccessCO2 Splitting by H2O to CO and O2 under UV Light in TiMCM-41 Silicate Sieve
Author(s) -
Wenyong Lin,
Hongxian Han,
Heinz Frei
Publication year - 2004
Publication title -
the journal of physical chemistry b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 392
eISSN - 1520-6106
pISSN - 1520-5207
DOI - 10.1021/jp040345u
Subject(s) - photodissociation , carbon monoxide , molecular sieve , silicate , analytical chemistry (journal) , chemistry , spectroscopy , infrared spectroscopy , infrared , electron transfer , photochemistry , catalysis , adsorption , physics , biochemistry , organic chemistry , chromatography , quantum mechanics , optics
The 266 nm light-induced reaction of CO{sub 2} and H{sub 2}O gas mixtures (including isotopic modifications {sup 13}CO{sub 2}, C{sup 18}O{sub 2}, and D{sub 2}O) 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. H{sub 2}O was confirmed as stoichiometric electron donor. The work establishes CO as the single photon, 2-electron transfer product of CO{sub 2} photoreduction by H{sub 2}O at framework Ti centers for the first time. O{sub 2} 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 CO{sub 2} by H{sub 2}O to CO and surface OH radical
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