Photocatalytic reduction of CO2 with H2O on various titanium oxide catalysts
作者： Masakazu Anpo , Hiromi Yamashita , Yuichi Ichihashi , Shaw Ehara
DOI: 10.1016/0022-0728(95)04141-A
关键词: Inorganic chemistry 、 Radical 、 Rutile 、 Carbon monoxide 、 Anatase 、 High resolution electron energy loss spectroscopy 、 Chemistry 、 Titanium oxide 、 Photocatalysis 、 Catalysis
摘要: Abstract UV irradiation of highly dispersed, anchored titanium oxide catalyst and finely powdered TiO2 catalysts in the presence a mixture CO2 H2O led to formation (CH4 + CH3OH CO) CH4, respectively, into gas phase at 275 K. The efficiency these photoreactions depended strongly on kind catalyst, ratio H2O, reaction temperature. In case dispersed catalysts, charge transfer excited state, i.e. (Ti3+ O−)3* tetrahedral coordinated species was found play an important role appearance efficient reactivity. anatase-type with large band gap numerous surface OH groups showed high for CH4. Detection Ti3+, H, C CH3 radicals by electron spin resonance 77 K suggests that photoreaction proceeds via CO from CO2. Cu-loading small brought about new CH3OH, Cu+ were significant this photocatalytic reaction. single crystals rutile TiO2, TiO2(100) exhibited higher CH4 than TiO2(110). Measurements intermediate formed crystal carried out using resolution energy loss spectroscopy.
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