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Effect of metal-substitution on the redox behaviors of mono-transition metal-substituted Wells–Dawson tungstoarsenates

Paper ID Volume ID Publish Year Pages File Format Full-Text
50277 46787 2015 6 PDF Available
Title
Effect of metal-substitution on the redox behaviors of mono-transition metal-substituted Wells–Dawson tungstoarsenates
Abstract

•KnAs2W17M1O62 (M = W, Mo, V, and Nb) Wells–Dawson tungstoarsenates were prepared.•Reduction potentials were measured by an electrochemical method.•Absorption edge energies were determined by UV–visible spectroscopy.•Oxidative dehydrogenation of benzylamine was conducted.•Yield for dibenzylimine increased with increasing redox properties.

Mono-transition metal (Mo, V, and Nb)-substituted Wells–Dawson tungstoarsenates were investigated to elucidate the effect of metal-substitution on their redox behaviors. In the electrochemical analysis, an additional redox transition was observed for molybdenum- and vanadium-substituted tungstoarsenates, while a negatively shifted redox transition was observed for niobium-substituted tungstoarsenate. First electron reduction potential of the catalysts showed the consistent trend with UV–visible absorption edge energy of the catalysts. Oxidative dehydrogenation of benzylamine to dibenzylimine was carried out as a model reaction to probe oxidation catalysis. Yield for dibenzylimine increased with increasing first electron reduction potential and with decreasing UV–visible absorption edge energy.

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Keywords
Redox behavior; Tungstoarsenate; Cyclic voltammetry; UV–visible spectroscopy; Oxidative dehydrogenation of benzylamine
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Effect of metal-substitution on the redox behaviors of mono-transition metal-substituted Wells–Dawson tungstoarsenates
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 65, 5 May 2015, Pages 66–71
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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