NO reduction with CH4 or CO on Pt/ZrO2–CeO2 catalysts

Liquid‐Phase Aerobic Oxidation of Benzyl Alcohol Catalyzed by Pt/ZrO2

“…There is no difference between the diffraction patterns of ZrO 2 and 1 % Pt/ZrO 2 . This could be due to the low concentration of the Pt (1 wt %) as concluded by Pérez-Hernández and coworkers [18]. Similarly we did not find any difference in the diffraction pattern of fresh and used catalysts.…”

Selective catalytic reduction of NO with CO on Pt/W–Ce–Zr catalysts

“…Pt/CeZrO showed a similar cubic phase as Pt/CeO 2 , but the characteristic peaks of Ceria were progressively shifted to larger angles due to the contraction of lattice cell parameter by insertion of ZrO 2 into CeO 2 fluorite lattice. This is coincident with the results in the literature [11]. For Pt/WO 3 /CeZrO and Pt/ WO 3 /ZrO 2 , slight monoclinic WO 3 phases were found at 39°, which means supported WO 3 dispersed well on the sample surfaces.…”

“…However, it is somewhat strange for Pt/WO 3 /CeZrO and Pt/WO 3 /ZrO 2 catalysts to possess relatively high catalytic activities. Perez-Hernandez [11] has reported that the presence of the acid-basic sites on the catalysts was important for the NO ? CO reaction.…”

“…Considering that WO 3 supported on ZrO 2 would produce super-acidic sites, and the acidic-basic sites were important for NO reduction [11], Pt/Ce-Zr-W system catalysts were constructed in this paper, and their physicochemical properties were measured. Two kinds of catalytic tests, under lean condition and rich condition, were employed, and the catalytic results were discussed based on their physicochemical characteristics.…”

Oxidation of Toluene to Benzoic Acid Catalyzed by Platinum Supported on Zirconia in the Liquid Phase-Solvent Free Conditions

“…The figure revealed that Pt/ZrO 2 calcined at 750°C exhibited both the tetragonal phase (major peak appears at 2h = 30.94°) and monoclinic phase (major peaks appears 2h = 28.18°and 31.38°). The reflection was observed for Pt at 2h = 39.79°which was not fully resolved due to small content of Pt (*1 wt%) as also concluded by PerezHernandez et al [26].The reduction processing of Pt/ZrO 2 affects crystallization and phase transition, resulting in certain fraction of tetragonal ZrO 2 transferred to monoclinic ZrO 2 as also reported else where [27]. However, the XRD pattern of Pt/ZrO 2 calcined at 950°C (Fig 2e, f) did not show any change before and after reduction in H 2 and were fully dominated by monoclinic phase.…”