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Redox behavior and oxidation catalysis of HnXW12O40 (X = Co2 +, B3 +, Si4 +, and P5 +) Keggin heteropolyacid catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50432 46794 2014 4 PDF Available
Title
Redox behavior and oxidation catalysis of HnXW12O40 (X = Co2 +, B3 +, Si4 +, and P5 +) Keggin heteropolyacid catalysts
Abstract

•HnXW12O40 (X = Co2 +, B3 +, Si4 +, and P5 +) heteropolyacids (HPAs) were prepared.•Reduction potentials were measured by an electrochemical method.•Homogeneous liquid-phase oxidation of benzaldehyde to benzoic acid was conducted.•Yield for benzoic acid increased with increasing reduction potential.

Redox behavior and oxidation catalysis of HnXW12O40 (X = Co2 +, B3 +, Si4 +, and P5 +) Keggin heteropolyacid catalysts were investigated. Successful formation of HnXW12O40 catalysts was confirmed by diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. Reduction potentials of HnXW12O40 catalysts were determined by electrochemical measurements. First electron reduction potential of HnXW12O40 catalysts decreased with increasing overall negative charge of heteropolyanion. HnXW12O40 catalysts were then applied to the liquid-phase oxidation of benzaldehyde to benzoic acid. Yield for benzoic acid increased with increasing first electron reduction potential.

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Keywords
Heteropolyacid; Redox behavior; Reduction potential; Oxidation of benzaldehyde
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Redox behavior and oxidation catalysis of HnXW12O40 (X = Co2 +, B3 +, Si4 +, and P5 +) Keggin heteropolyacid catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 43, 5 January 2014, Pages 155–158
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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