Abstract
Anisotropic oxidation of crystallites of vanadyl pyrophosphate ((VO)2P2O7) has been demonstrated by Raman spectroscopy with samples having different microstructures. Oxidation of these samples by O2 produced X1 phase,α- andβ-VOPO4 phases. The relative peak intensity of the X1 phase to the other phases correlated well with the ratio of the (100) plane to the side planes (surface area-basis). This correlation showed that the (100) plane was oxidized to X1 phase and the side planes toα- andβ-VOPO4. For example, thin plate-like (VO)2P2O7, of which the (100) fraction is 98%, was oxidized almost exclusively to X1 phase. But when it was fractured into small plates to increase the side planes and then oxidized,α- andβ-VOPO4 were detected in addition to the X1 phase. These results are consistent with our previous conclusion that the (100) plane of (VO)2P2O7 is selective, but side planes are non-selective for catalytic oxidation ofn-butane.
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References
G. Centi, F. Trifirò, J.R. Ebner and V.M. Franchetti, Chem. Rev. 88 (1988) 55.
B.K. Hodnett, Catal. Rev. Sci. Eng. 27 (1985) 373.
G. Centi, Catal. Today 16 (1993) 5.
T. Shimoda, T. Okuhara and M. Misono, Bull. Chem. Soc. Jpn. 58 (1985) 2163.
T.P. Moser and G.L. Schrader, J. Catal. 92 (1985) 216.
G. Busca, F. Cavani, G. Centi and F. Trifirò, J. Catal. 99 (1986) 400.
N.H. Batis, H. Batis, A. Ghorbel, J.C. Vedrine and J.C. Volta, J. Catal. 128 (1991) 248.
E. Bordes and P. Courtine, J. Chem. Soc. Chem. Commun. (1985) 294.
H. Morishige, J. Tamaki, N. Miura and N. Yamazoe, Chem. Lett. (1990) 1513.
M.T. Sananes, G.J. Hutchings and J.C. Volta, J. Chem. Soc. Chem. Commun. (1995) 243; J. Catal. 154 (1995) 253.
E.C. Milberger, N.J. Bremer and D.E. Dria, US Patent 4333853 (1982).
R.A. Schneider, US Patent 4043943 (1977).
H.S. Horowitz, C.M. Blackstone, A.W. Sleight and G. Teufer, Appl. Catal. 38 (1988) 193.
J. Ziolkowski, E. Bordes, and P. Courtine, J. Catal. 122 (1990) 126; J. Mol. Catal. 84 (1993) 307.
H. Igarashi, K. Tsuji, T. Okuhara and M. Misono, J. Phys. Chem. 97 (1993) 7065.
T. Okuhara, K. Inumaru and M. Misono,Catalytic Selective Oxidation, ACS Symp. Ser. 523 (Am. Chem. Soc., Washington, 1993) p. 156;
K. Inumaru, T. Okuhara and M. Misono, Chem. Lett. (1992) 1955.
F.B. Abdelouahab, R. Olier, N. Guilhaume, F. Lefebvre and J.C. Volta, J. Catal. 134 (1992) 151.
G.J. Hutchings, A.D. Chomel, R. Olier and J.C. Volta, Nature 368 (1994) 41.
G. Koyano, T. Okuhara and M. Misono, Catal. Lett. 32 (1995) 205.
I. Matsuura, A. Mori and M. Yamazaki, Chem. Lett. (1987) 1897.
T.P. Moser and G.L. Schrader, J. Catal. 104 (1987) 99.
M.A. Pepera, J.L. Callahan, M.J. Desmond, E.C. Milberger, P.R. Blum and N.J. Bremer, J. Am. Chem. Soc. 107 (1985) 4883.
Y.Z. Lin, M. Forissier, R.P. Sneeden, J.C. Vedrine and J.C. Volta, J. Catal. 145 (1994) 267.
Y.Z. Lin, M. Forissier, R.P. Sneeden, J.C. Vedrine and J.C. Volta, J. Catal. 145 (1994) 256.
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Koyano, G., Yamaguchi, F., Okuhara, T. et al. Anisotropic oxidation of crystallites of vanadyl pyrophosphate. Catal Lett 41, 149–152 (1996). https://doi.org/10.1007/BF00811482
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DOI: https://doi.org/10.1007/BF00811482