Abstract
On sulfated ZrO2, the comparison of the effects of adsorbing water or ammonia on the infrared bands between 1400 and 1000 cm−1 suggests that besides structural Lewis sites on the surface of ZrO2, strong Lewis sites are made from chemisorbed SO3. Upon adsorption of water, SO3 is converted, partially, into a surface sulfated species which may act as strong Brønsted sites. At moderate surface hydration, both types of sites may coexist. The catalytic activity in the isomerization of isobutane is a function of the overall nominal surface density in SO4. The acid sites on the surface of phosphated mesoporous zirconia are attributable to surface P–OH groups working as weak Brønsted sites. On both sulfated and phosphated zirconia, surface coating of alumina stabilizes the porosity, but it does not modify the nature of their acid centers.
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References
G. Pacheco, E. Zhao, A. Garcia, A. Sklyarov and J.J. Fripiat, J. Mater. Chem. 8 (1998) 219.
E. Zhao, O. Hernandez, G. Pacheco, G.S. Hardcastle and J.J. Fripiat, J. Mater. Chem. 8 (1998) 1635.
E. Zhao, S.E. Hardcastle, G. Pacheco, A. Garcia, A.L. Blumenfeld and J.J. Fripiat, Micropor. Mesopor. Mater. (1999), submitted.
K. Tanabe, H. Hattori and T. Yamaguchi, Crit. Rev. Surf. Chem. 1 (1990) 1.
A. Corma, J. Chem. Rev. 95 (1995) 559.
X. Song and A. Sayari, Catal. Rev. Sci. Eng. 38 (1996) 329.
Z. Hong, K.B. Fogash and J.A. Dumesic, Catal. Today (1998), submitted.
C. Morterra, G. Cerrato, F. Pinna and M. Signoretta, J. Phys. Chem. 98 (1994) 12373.
F. Babou, G. Courdurier and J.C. Vedrine, J. Catal. 159 (1995) 341.
M.R. Gonzalez, J.M. Kobe, K.B. Fogash and J.A. Dumesic, J. Catal. 160 (1996) 290.
F. Babou, B. Bigot and P. Sautet, J. Phys. Chem. 97 (1993) 11501.
J.M. Kobe, M.R. González, K.B. Fogash and J.A. Dumesic, J. Catal. 164 (1996) 459.
G.A. Olah and A. Molnar, Hydrocarbon Chemistry (Wiley, New York, 1995).
A. Ghenciu and D. FĂrcaşiu, J. Mol. Catal. A 109 (1996) 273.
A. Ghenciu and D. FĂrcaşiu, Catal. Lett. 44 (1997) 29.
D.J. Coster, A. Bendada, F.R. Chen and J.J. Fripiat, J. Catal. 140 (1993) 497.
J.H. Lunsford, H. Sang, S.M. Campbell, C.-H. Liang and R.G. Anthony, Catal. Lett. 27 (1994) 305.
T. Riemer and H. Knözinger, J. Phys. Chem. 100 (1996) 6739.
J.H. Lunsford, Topics Catal. 4 (1997) 91.
F. Yin, A.L. Blumenfeld, V. Gruver and J.J. Fripiat, J. Phys. Chem. B 101 (1997) 1824.
A. Auroux, M. Muscas, J.D. Coster and J.J. Fripiat, Catal. Lett. 28 (1994) 207.
K.B. Fogash, G. Yaluris, M.R. González, P. Ouraipryvan, D.A. Ward, E.I. Ko and J.A. Dumesic, Catal. Lett. 32 (1995) 241.
K.B. Fogash, Z. Hong, J.M. Kobe and J.A. Dumesic, Appl. Catal. 172 (1998) 107.
R.A. Boyse and E.I. Ko, Catal. Lett. 38 (1996) 225.
K. Nakamoto, Infrared Spectra of Inorganic and Coordination Compounds, 2nd Ed. (Wiley-Interscience, New York, 1970).
F.A. Cotton and G. Wilkinson, Advanced Inorganic Chemistry, 5th Ed. (Wiley, New York, 1988).
V. Semmer, C. Batamack, C. Dorémieux-Morrin and J. Fraissard, Topics Catal. 6 (1998) 199.
Z. Gao, Y. Xia, W. Hua and C. Miao, Topics Catal. 6 (1998) 101.
V. Adeeva, H.-Y. Liu, B.-Q. Xu and W.M.H. Sachtler, Topics Catal. 6 (1998) 61.
J. Zhang, J.B. Nicholas and J.F. Haw, submitted.
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Zhao, E., Isaev, Y., Sklyarov, A. et al. Acid centers in sulfated, phosphated and/or aluminated zirconias. Catalysis Letters 60, 173–181 (1999). https://doi.org/10.1023/A:1019027628585
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DOI: https://doi.org/10.1023/A:1019027628585