Reduction of CO2 with H2O on TiO2(100) and TiO2(110) Single Crystals under UV-irradiation

Abstract

The reduction of CO2 with H2O was investigated on the single crystals of TiO2(100) and TiO2(110); the former TiO2(100) exhibiting a higher efficiency in the formation of CH4 and CH3OH than TiO2(110). Measurements of the intermediate species formed on the TiO2(100) single crystal were carried out using a high resolution electron energy loss spectroscopy (HREELS).

Photocatalytic CO2 reduction by TiO2 and related titanium containing solids

“…Although the reasons for this opposite behavior have not been analysed yet, these results show the influence that the morphology of TiO 2 has on its photocatalytic activity. 131,132 In this regard, a recent publication has shown that anatase TiO 2 nanorods loaded with platinum are more efficient than the analogous P25 sample for the photocatalytic CO 2 reduction to CH 4 in the presence of H 2 O vapor. 103 Although the initial reaction rates for the TiO 2 nanorods and P25 are not that different, it is the long term photoactivity of TiO 2 nanorods which is affected with respect to P25.…”

Hybrid CuO‐TiO2−xNx Hollow Nanocubes for Photocatalytic Conversion of CO2 into Methane under Solar Irradiation

“…GC analysis of the products showed predominantly methane, along with ethane, propane, and butane as minor products. [30] Also, control experiments show that there is no appreciable hydrocarbon production in the absence of either solar irradiation or photocatalysts, indicating that there are no significant thermal or photon effects, respectively. The CuO-TiO 2Àx N x hollow nanocubes yield 41.3 ppm g À1 h À1 of methane, which represents a production rate that is 2.5 times faster than that of Degussa P25 TiO 2 when measured under the same conditions (16.2 ppm g À1 h À1 ).…”

Highly-dispersed Boron-doped Graphene Nanosheets Loaded with TiO2 Nanoparticles for Enhancing CO2 Photoreduction

“…Since the successful works in 1979 by Fujishima et al1 to report the photoelectrocatalytic reduction of CO 2 to form organic compounds such as formic acid, formaldeyde, methyl alcohol and methane, in the presence of photosensitive semiconductor powders suspended in water as catalysts, many studies have been focused on the modification of TiO 2 in order to exploit its application to the CO 2 photoreduction234567. As an ideal photocatalyst, nanoscaled TiO 2 was widely used in the photodegradation of organic pollutants89, due to its inexpensive, non-toxic, high stability, and other advantages10111213.…”