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Electrochemical and UV–visible spectroscopy studies of K6As2W18 − xMoxO62 (x = 0–3) Wells–Dawson heteropolyacid catalysts for oxidative dehydrogenation of benzyl alcohol

Paper ID Volume ID Publish Year Pages File Format Full-Text
49492 46750 2014 5 PDF Available
Title
Electrochemical and UV–visible spectroscopy studies of K6As2W18 − xMoxO62 (x = 0–3) Wells–Dawson heteropolyacid catalysts for oxidative dehydrogenation of benzyl alcohol
Abstract

•K6As2W18 − xMoxO62 (x = 0–3) Wells–Dawson heteropolyacids were prepared.•Reduction potentials were measured by an electrochemical method.•Absorption edge energies were determined by UV–visible spectroscopy.•Vapor-phase oxidative dehydrogenation of benzyl alcohol was conducted.•Yield for benzaldehyde increased with increasing redox properties.

Redox behaviors of molybdenum-substituted Wells–Dawson tungstoarsenate heteropolyacid catalysts (α-K6As2W18 − xMoxO62 (x = 0–3)) were probed by electrochemical and UV-visible spectroscopy measurements. Reduction potential of K6As2W18 − xMoxO62 (x = 0–3) catalysts shifted to more positive potential with increasing molybdenum content. UV–visible spectroscopy analysis was conducted as a simple diagnostic method for reduction potential. Absorption edge energy determined by UV–visible spectroscopy decreased with increasing reduction potential. Gas-phase oxidative dehydrogenation of benzyl alcohol was carried out as a model reaction. Yield for benzaldehyde increased with increasing electrochemical reduction potential and with decreasing UV–visible absorption edge energy of the catalysts.

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Keywords
Tungstoarsenates; Molybdenum; Electrochemical measurement; UV–visible spectroscopy; Oxidative dehydrogenation
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Electrochemical and UV–visible spectroscopy studies of K6As2W18 − xMoxO62 (x = 0–3) Wells–Dawson heteropolyacid catalysts for oxidative dehydrogenation of benzyl alcohol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 55, 5 October 2014, Pages 29–33
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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