Alumina supported Mo–V–Te–O catalysts for the ammoxidation of propane to acrylonitrile

Guerrero‐Pérez, M. Olga; Alemany, Luı́s J.

doi:10.1016/j.apcata.2008.02.032

Cited by 15 publications

(3 citation statements)

References 63 publications

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“…The activity of Mo-V-(M)-O for heterogeneous gas phase catalysis has been attributed to the symbiosis between the two phases M1 and M2, site isolation in a single optimum M1 composition, and the nature of the acid sites (Lewis and Bronsted) on the surface of the catalyst. ,− Presumably, similar mechanisms can be used to explain the activity observed in this study. In this study, cyclohexanol was oxidized to cyclohexanone, but further oxidation did not occur on Mo-V-O.…”

Section: Discussionmentioning

confidence: 98%

Mo-V-O Based Electrocatalysts for Low Temperature Alcohol Oxidation

Pacquette

Gewirth

2015

J. Phys. Chem. C

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There is a growing interest in alcohol oxidation electrochemistry due to its role in renewable energy technologies. The goal of this work was to develop active non-precious metal electrocatalysts based on the Mo-V-(M)-O (M is Nb, Te) lattice. Selective gaseous alkane oxidation had been previously observed on these catalysts at elevated temperatures above 300°C. In this study, the activity of the catalysts at lower temperatures, 25−60°C, was investigated. Hydrothermal conditions were used to synthesize the Mo-V-(M)-O mixed oxides. Physical characterization of the catalysts were obtained by powder X-ray diffraction (XRD), scanning electron micrography (SEM) equipped with energy dispersive X-ray (EDX), transmission electron micrography (TEM), and X-ray photoelectron spectroscopy (XPS). The catalytic activity for the oxidation of cyclohexanol was studied electrochemically. Chronoamperometric studies were used to evaluate the long-term performance of the catalysts. The onset of alcohol oxidative current was observed between 0.2 and 0.6 V versus Ag/AgCl. Gas chromatography−mass spectrometry analysis was used to determine the nature of the oxidative products. The mild oxidation products, cyclohexanone and cyclohexene, were observed after oxidation at 60°C. The catalytic activity increased in the order Mo-V-O < Mo-V-Te-O < Mo-V-Te-Nb-O. Mo-V-(Te,Nb)-O based electrocatalysts efficiently catalyzed the oxidation of alcohols at low temperatures.

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Section: Discussionmentioning

confidence: 98%

Mo-V-O Based Electrocatalysts for Low Temperature Alcohol Oxidation

Pacquette

Gewirth

2015

J. Phys. Chem. C

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“…The improved catalytic properties of Mo-V-O oxides have also been reported for partial oxidation reactions, such as the dehydrogenation of propane [38][39][40], propane ammoxidation to acrylonitrile [41][42][43], or the selective propane oxidation into acrylic acid [44,45]. It has been demonstrated that molybdenum favors the presence of reduced vanadium V 4+ species, which are stabilized in a rutile-like structure that is responsible for the redox cycle [46]. Temperature Programmed Reduction (TPR) experiments [37] show that the addition of Mo to V/TiO 2 favors vanadium reduction, with Mo-V-O catalysts being more easily reduced with respect the corresponding binary supported samples and their bulk counterparts.…”

Section: Removal Of Noxmentioning

confidence: 94%

V-Containing Mixed Oxide Catalysts for Reduction–Oxidation-Based Reactions with Environmental Applications: A Short Review

Guerrero‐Pérez

2018

Catalysts

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V-containing mixed oxide catalytic materials are well known as active for partial oxidation reactions. Oxidation reactions are used in industrial chemistry and for the abatement of pollutants. An analysis of the literature in this field during the past few years shows a clear increase in the use of vanadium-based materials as catalysts for environmental applications. The present contribution makes a brief revision of the main applications of vanadium containing mixed oxides in environmental catalysis, analyzing the properties that present the catalysts with a better behavior that, in most cases, is related with the stabilization of reduced vanadium species (as V4+/V3+) during reaction.

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“…Nowadays, acrylonitrile is mainly obtained by the propylene ammoxidation process with an acrylonitrile selectivity of more than 80% at 98% propylene conversion [1]. In recent years, the direct one-step ammoxidation of propane to acrylonitrile over the mixed oxide catalysts has attracted broad attention [2][3][4][5][6][7][8]. At the beginning stage of the researches, various types of catalysts for propane ammoxidation were explored.…”

Section: Introductionmentioning

confidence: 99%

Effect of reduction-oxidation treatment on the properties of VSb3W-Al2O3 catalyst for propane ammoxidation

et al. 2010

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VSb 3 W-Al 2 O 3 catalysts for propane ammoxidation were prepared by the conventional slurry method and new slurry method, namely, the reduction-oxidation slurry method. The effect of preparation methods on the physicochemical properties of VSb 3 W-Al 2 O 3 catalysts were studied by N 2 adsorption, XRD, XPS and Raman spectroscopy, and their catalytic performance for the ammoxidation of propane to acrylonitrile were tested. Compared with the VSb 3 W-Al 2 O 3 catalyst prepared by the conventional slurry method, the VSb 3 W-Al 2 O 3 catalyst prepared by the reduction-oxidation slurry method exhibited better propane conversion and acrylonitrile selectivity. This is due to that the reduction-oxidation treatment was advantageous for obtaining low valence state vanadium and high valence state antimony to form more rutile SbVO 4 , which is a vital active phase for propane ammoxidation.

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Alumina supported Mo–V–Te–O catalysts for the ammoxidation of propane to acrylonitrile

Cited by 15 publications

References 63 publications

Mo-V-O Based Electrocatalysts for Low Temperature Alcohol Oxidation

Mo-V-O Based Electrocatalysts for Low Temperature Alcohol Oxidation

V-Containing Mixed Oxide Catalysts for Reduction–Oxidation-Based Reactions with Environmental Applications: A Short Review

Effect of reduction-oxidation treatment on the properties of VSb3W-Al2O3 catalyst for propane ammoxidation

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