Effect of highly dispersed active sites of Cu/TiO2 catalyst on CO oxidation

Near UV‐Irradiation of CuOx‐Impregnated TiO2 Providing Active Species for H2 Production Through Methanol Photoreforming

“…The TPR profile of Cu(3 %)/P25 sample after calcination at 350°C is shown in Figure 5A, while the TPR profiles of Cu(3 %)/P25 sample after calcination at 250, 450 and 550°C are reported in Figure S6 (Supplementary Information). All of them are reported in the temperature range characteristic of copper oxide reduction, [22,38,52] where instead TiO 2 reduction was hardly observed.…”

“…The assignment of the reduction peak at lower temperature is quite controversial: it is generally ascribed to the reduction of highly reducible Cu 2 + species, though the presence of Cu + species cannot be ruled out. [38] Indeed, Chen et al [22] assigned the TPR peak in this range to the reduction of Cu + species in Cu(3 %)/P25 sample. The formation of Cu + species was ascribed to the presence of oxygen-defect vacancies in the TiO 2 structure.…”

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

“…Komova et al [5] suggested that three kinds of copper species exist on the surface of anatase TiO 2 , which are chain stabilized Cu 2+ ions (Cu O Ti) with fourcoordinated, crystalline CuO, and copper oxide clusters (Cu O Cu). As regards the reducibility of CuO/TiO 2 catalysts, the dispersed copper oxide is easier to be reduced than crystalline CuO [2,5,10,12]. However, the anatase support presents a poor thermal stability, which will transform from anatase phase to rutile at high temperatures [9,15].…”

“…In the past decades, a number of studies have been carried out for understanding CuO/TiO 2 catalysts due to their promising activity for CO oxidation [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. It is generally accepted that the activity of this catalytic system depends on the surface copper species concentration, dispersion state, reducibility and so on.…”

Effect of Pt or Pd doping on stability of TiO2 nanoparticle suspension in water

“…There are a few experimental investigations on this simple method. For instance, V doped TiO 2 (V/TiO 2 ) could be prepared by the absorption of V onto TiO 2 with visible light engagement [5] or Cu/TiO 2 could be prepared using reduction of Cu 2+ ions onto TiO 2 by CO [6].…”