CATALYTIC PROPERTIES OF THERMALLY DECOMPOSED 12-MOLYBDOPHOSPHORIC AND 10-MOLYBDO-2-<BR>VANADOPHOSPHORIC ACIDS

SONG IK; MOON SH; LEE WY

Korean Journal of Chemical Engineering, Vol.8, No.1, 33-38, January, 1991

CATALYTIC PROPERTIES OF THERMALLY DECOMPOSED 12-MOLYBDOPHOSPHORIC AND 10-MOLYBDO-2-
VANADOPHOSPHORIC ACIDS

Changes in the structural and surface properties of 12-molybdophosphoric(abbreviated as PMo₁₂) and 10-molybdo-2-vanadophosphoric(abbreviated as PMo₁₀V₂) acids as they are decomposed at high temperatures have been studied by IR, XRD, XPS, and TPD experiments. PMo₁₂ simply decomposes into MoO₃ by heat-treatment at 580℃, but PMo₁₀V₂ yields a mixed oxide whose properties are different from those of either MoO₃ or V₂O₅. After the thermal decomposition, PMo₁₂ loses the initial acidic and redox properties almost completely but PMo₁₀V₂ retains some extent of the redox capability that is larger than that of MoO₃ and V₂O₅. The redox capability of the mixed oxide obtained by PMo₁₀V₂ decomposition is correlated with its catalytic activity in oxidation processes.

[References]

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Misono M, Sakata K, Yoneda Y, Lee WH, Kodansha, Tokyo-Elsevier, Amsterdam (1981)
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[Referenced By]

[1] Tsigdinos GA, Topics Curr. Chem., 76, 1 (1978)

[2] Sasaki Y, Matsumoto K, Kag, Ryoiki, 29, 835 (1975)

[3] Komata T, Mosono M, Chem. Lett., 1177 (1983)

[4] Yoshida S, Nilyama H, Echigoya E, J. Phys. Chem., 86, 3150 (1982)

[5] Mizuno M, Watanabe T, Misono M, J. Phys. Chem., 89, 80 (1985)

[6] Onoue Y, Mizutani Y, Akiyama S, Izumi Y, Chemtech, 432 (1978)

[7] Misono M, Sakata K, Yoneda Y, Lee WH, Proc. 7th Int. Con. Catal., 1047 (1980)

[8] Misono M, Sakata K, Yoneda Y, Lee WH, Kodansha, Tokyo-Elsevier, Amsterdam (1981)

[9] Akimoto M, Shima K, Ikeda H, Echigoya E, J. Catal., 86, 173 (1981)

[10] Eguchi K, Aso I, Yamazoe N, Seiyama T, Chem. Lett., 1345 (1979)

[11] Tsigdinos GA, Ind. Eng. Chem. Res., 13, 4 (1974)

[12] Tsigdinos GA, Hallada CJ, Inorg. Chem., 7, 437 (1968)

[13] Song IK, M.S. Thesis, Seoul National Univ. Seoul, Korea (1989)

[14] Furata M, Sadata K, Misono M, Chem. Lett., 31 (1979)