Effect of titania structure on the properties of its supported copper oxide catalysts

Influence of molar ratio and calcination temperature on the properties of Ti Sn1−O2 supporting copper oxide for CO oxidation

“…As a result, few defect sites are present on the surface of the samples, that is, the surface oxygen vacancy. Interestingly, the temperature of the reduction peaks of the 5CuT3S1-450 sample is higher than that of the 5CuT3S1-600 sample, which is attributed to the presence of anatase TiO 2 in the 5CuT3S1-450 sample; as reported previously, the CuO cannot be easily reduced on the surface of anatase [46].…”

“…Combined with the activity results, the low activity in the 5CuT3S1-450 sample may be explained by the formation of TiO 2 (anatase). Copper oxide loaded on the TiO 2 (rutile) exhibits a higher activity than that on TiO 2 (anatase) [46]. The low activity in the 5CuT3S1-850 and 5CuT3S1-1200 samples may be a result of the small BET area and the spinodal decomposition at high temperatures.…”

Surface structure characteristics of CuO/Ti0.5Sn0.5O2 and its activity for CO oxidation

“…According to our previous incorporation model [19,34], the TS support with rutile structure could offer only one kind of vacant site (as shown in Fig. 6A) on the preferentially exposed (1 1 0) plane (as shown in Fig.…”

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

“…NO reduction by CO reaction was comparatively studied over microwave plasma pretreated CuO/TiO 2 heterogeneous catalysts employing transmission electron microscopy, H 2 temperature programmed reduction, and in situ Fourier transform infrared spectroscopy [152–154]. The CuO/TiO 2 heterogeneous catalytic performances indicated that a remarkable improvement in activity and selectivity was achieved after microwave plasma pretreatment, which depends on the microwave plasma pretreatment time [153]. The results also suggested that high active oxygen species are formed on the surface of plasma pretreated CuO/TiO 2 heterogeneous catalysts, which led to the easy oxidation of NO to NO 2 at low temperatures even without the introduction of any additional O 2 gas.…”

“…This, in turn, can easily reduce the CO or H 2 at low temperatures [150]. For example, CuO/TiO 2 photocatalyst is very active in the reduction of water under sacrificial conditions (95 vol.% H 2 O, 5 vol.% CH 3 OH) and UV excitation, with the optimal CuO loading of 5 to 10 wt% of the heterogeneous catalyst system [153]. The high catalytic activity caused photo-citation of electrons in the conduction bands of both CuO and TiO 2 , followed by the migration of the conduction band electrons in TiO 2 into the conduction band of CuO heterogeneous catalyst [155, 156].…”