Electrochemical activation of sulfate by BDD anode in basic medium for efficient removal of organic pollutants.

Anionic defects engineering of Co3O4 catalyst for toluene oxidation

The current work mainly focuses on exploring the impact of B-site partial substitution on the physico-chemical property and the catalytic performance of LaM0.25Co0.75O3 (M = Cu, Mn, Fe) perovskites for the catalytic reduction of NO by CO. Measurements are applied to characterize the gained catalysts, including XRD, N2-physisorption (BET), H2-TPR, O2-TPD, ICP-AES, XPS and in situ DRIFTS. The results are listed below: (1) with partial substitution of foreign cations, the perovskite structure of LaCoO3 is maintained effectively with improved catalytic performance; (2) the reduction property and content of oxygen defect sites of partial substituted catalysts are the key factors for the improved catalytic performance; (3) the partial substitution of copper obviously reduces the impact of the restriction for CO adsorption by NO preferential adsorption on LaCoO3 catalyst; (4) the partial substitution of copper distinctly promotes the reducing capacity and adsorption of gaseous O2 for LaCoO3. Besides, taking LaCu0.25Co0.75O3 catalyst as an example, a reliable catalytic model is tentatively put forward to thoroughly exploring the reaction process in NO + CO reaction.

Catalytic reduction of NO by CO over B-site partially substituted LaM0.25Co0.75O3 (M = Cu, Mn, Fe) perovskite oxide catalysts: The correlation between physicochemical properties and catalytic performance

In situ modification of cobalt on MXene/TiO2 as composite photocatalyst for efficient nitrogen fixation.

Rapid removal of anionic dye from water by poly(ionic liquid)-modified magnetic nanoparticles

Enhanced activity and stability of copper oxide/γ-alumina catalyst in catalytic wet-air oxidation: Critical roles of cerium incorporation

A series of novel Pt-modified Cu–Fe–La/γ-Al2O3 catalysts were prepared by an incipient-wetness impregnation method, and their performances were evaluated in catalytic wet air oxidation (CWAO) of printing and dyeing wastewater (PDW). The as-prepared catalysts were characterized by X-ray photoelectron spectroscopy (XPS), nitrogen adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Raman spectroscopy, and temperature programmed reduction by hydrogen (H2-TPR). The effects of catalyst composition and calcination temperature on the catalytic performance were investigated. The chemical oxygen demand (COD) removal efficiency and decolorization rate are satisfactory over Cu1.5Fe1.5La3/γ-Al2O3 catalyst, with poor stability under CWAO conditions. In contrast, catalytic performance and stability of all Pt-modified catalysts are significantly improved. With increasing calcination temperatures from 350 °C to 750 °C, the activity of the catalysts significantly decreases from 97.3% to 84.6%, and the size of the particles varies from 4.71–6.95 nm. The XRD, HRTEM, and XPS results indicate that the Pt1Cu1Fe1La3/γ-Al2O3 catalyst mostly comprises Pt, CuO, Fe3O4, and La2O3, and the incorporation of Pt increases the binding energies (BEs) of the metal elements in the catalyst, owing to synergistic interactions between the Pt and the Cu, Fe, and La elements. After five cycles, the COD removal efficiency and decolorization rate for PDW over the Pt1Cu1Fe1La3/γ-Al2O3 catalyst calcined at 650 °C remain comparable with the fresh catalyst, indicating that Pt-modified Cu–Fe–La/γ-Al2O3 ternary oxide is a promising catalyst with high activity and stability for CWAO treatment.

/pdf/manipulating-catalytic-activity-and-durability-of-pt-2ulbu67ko4.pdf

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al2O3 ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

The invention discloses a catalytic wet oxidation treatment method of a Fe-Co-Pt-La-Ti composite catalyst. The Fe-Co-Pt-La-Ti/FSC carried catalyst which takes nitrates of iron, cobalt, platinum and lanthanum and titanium tetrachloride as precursors and takes FSC as a carrier is applied to catalytic wet oxidation of landfill leachate and has a relatively good effect. When the ratios of Fe, Co, Pt, La and Ti are as follows: 10 parts of Fe, 18 parts of Co, 12 parts of Pt, 25 parts of La and 15 parts of Ti, the reaction time is shorter than 90 minutes, and the COD removal rate of the landfill leachate is the highest and is up to 88.3 percent; moreover, the turbidity removal rate of the landfill leachate subjected to catalytic wet oxidation treatment is up to 99.2 percent, the activity is the highest, and the catalysis performance is excellent; the composite catalyst is stable in performance.

Yanbo Zhou

Papers

Enhanced activity and stability of copper oxide/γ-alumina catalyst in catalytic wet-air oxidation: Critical roles of cerium incorporation

Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al2O3 ternary catalyst for catalytic wet air oxidation: effect of calcination temperature

Catalytic wet oxidation treatment method of Fe-Co-Pt-La-Ti composite catalyst