A Ce-Mn composite oxide possessing a rod-like morphology (with a fixed molar ratio of Ce/Mn=3:7) was synthesized through a hydrothermal method. Mn ions were doped into a CeO2 framework to replace Ce ions, thereby increasing the concentration of oxygen vacancies. The formation energies of O vacancies for the Ce-Mn composite oxide were calculated by applying density functional theory (DFT). The d...

γ-Al(2)O(3) is a well known catalyst support. The addition of Ce to γ-Al(2)O(3) is known to beneficially retard the phase transformation of γ-Al(2)O(3) to α-Al(2)O(3) and stabilize the γ-pore structure. In this work, Ce-doped γ-Al(2)O(3) nanowires have been prepared by a novel method employing an anodic aluminium oxide (AAO) template in a 0.01 M cerium nitrate solution, assisted by urea hydroly...

In the present study, PtRuCe/MWNTs nanocatalysts synthesized via polyol process technique are applied as anode electro-catalyst in methanol electro-oxidation reaction (MOR). To characterize the nanocatalysts, TEM, XRD, EDS and XPS are investigated. Cyclic voltammetry and choronoamperometry are used to evaluate the electro-catalytic activ...

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Among the studied (Pd), Co-, Ce-, Zr-oxide catalysts including catalysts deposited on structured cordierite support, the catalyst prepared by co-deposition of ceria and cobalt oxide is characterized by higher activity in reaction of reduction of nitrogen(I), (II) oxides (CO + NO, N2O + NO + CO) compared with samples prepared by successive deposition. This may be caused by an increase in both mo...

A high-throughput screening (HTS) method based on fluorescence imaging (FI) was implemented to evaluate the catalytic performance of selenide-modified nano-TiO2. Chemical ink-jet printing (IJP) technology was reformed to fabricate a catalyst library comprising 1405 (Ni(a)Cu(b)Cd(c)Ce(d)In(e)Y(f))Se(x)/TiO2 (M6Se/Ti) composite photocatalysts. Nineteen M6Se/Tis were screened out from the 1405 can...

Zeolite X was synthesized from fly ash under optimized conditions, which supported with Mn, Ce, and Mn-Ce respectively. Fly ash-derived zeolite catalysts exhibited similar catalytic performance as compared the commercial catalyst. XRD, N2 adsorption, SEM, XPS, H2-TPR were used to investigate relationship among structure, physicochemical properties, activities of catalysts. Finally, mechanism NH...

The nanoparticles of Ni–Si mixed oxides were prepared by co-precipitation method using nickel nitrate; Ni(NO3)2 6H2O and tetraethylorthosilicate (TEOS). The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and hydrogen temperature program reduction (H2-TPR). The results revealed that Ni–Si mixed oxides particles were obtained with average particle ...

Selective catalytic reduction (SCR) of nitrogen oxide (NO) by ammonia (NH3) was studied in this work over new sulfate (SO42-) or tungsta (WO3) modified CeO2-TiO2 aerogel catalysts. The systems were elaborated via sol gel method then characterized by: XRD, N2-Physisorption at 77 K, DRUV–vis, NH3-TPD and H2-TPR. It revealed that the nature acidic components influences differently texture, surface...

Ce sites may play an important role in defining active sites in ceria-based catalysis. Yet, though present at the catalyst surface, their positions have not been experimentally observed. Recently, it has been argued that Ce sites are the preferred location for the binding of Au− species on a highly reduced CeO2(111) surface with subsurface oxygen defects. Hence, Au atoms have been proposed as t...