Reduction potential and oxidation catalysis of vanadium-containing H6+xP2Mo18−xVxO62 Wells-Dawson heteropolyacid (HPA) catalysts
Authors: Park, Dong Ryul1; Kim, Heesoo1; Jung, Ji Chul1; Lee, Sang Hee1; Song, In Kyu1
Source: Research on Chemical Intermediates, Volume 34, Numbers 8-9, 2008 , pp. 845-851(7)
Publisher: VSP, an imprint of Brill
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Abstract:
Vanadium-containing H6+xP2Mo18−xVxO62 (x = 0-3) Wells-Dawson heteropolyacid (HPA) catalysts were prepared. The successful formation of the Wells-Dawson HPAs was confirmed by FT-IR and ICP-AES analyses. The reduction potential of the H6+xP2Mo18-xVxO62 (x = 0-3) catalysts was determined by temperature-programmed reduction measurements. The Wells-Dawson HPA catalysts were applied to the vapor-phase oxidation of methacrolein and benzyl alcohol. The reduction potential, conversion of methacrolein, and conversion of benzyl alcohol showed volcano-shaped curves with respect to vanadium substitution, and decreased in the order of H8P2Mo16V2O62 > H7P2Mo17V1O62 > H9P2Mo15V3O62 > H6P2Mo18O62. A correlation between reduction potential and catalytic activity clearly showed that the conversion was monotonically increased with increasing reduction potential of the HPA catalyst in both oxidation reactions.Keywords: WELLS-DAWSON HETEROPOLYACID; REDUCTION POTENTIAL; OXIDATION CATALYSIS
Document Type: Research article
DOI: 10.1163/156856708786189311
Affiliations: 1: School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Shinlim-dong, Kwanak-ku, Seoul 151-744, South Korea
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