Study of Surface-Bulk Distribution of Tungsten in WO3/ZrO2 Oxides Prepared by Different Methods

• Autorzy: Brei V. V. , Melezhyk A. V. , Prudius S. V. , Oranskaya E. I.
• Języki publikacji: EN

Abstrakty

EN

The citrate method for the synthesis of superacid WO3/ZrO2 is pro posed. The data on W surface-bulk distribution in WO3/ZrO2 samples prepared by three methods confirm the formation of solid solution of W6+ ions in zirconia lattice. Difference of WO3/ZrO2 lattice cell parameters calculated from the XRD data compared to pure ZrO2 also verifies formation of the solid solution. Isolated WO4 2 - tetrahedra at tached to surface of Zr4+ ions could form strong acidic sites according to the data on surface W content. The distribution on strength of acid sites for the superacid WO3/ZrO2 in the range of –5.6 greater-than or equal to Ho greater-than or equal to –14.5 was determined.

Słowa kluczowe

EN

tungstated zirconia; solid acid; acid catalysts; citrate method; Hammett acidity

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2009
• Tom: Vol. 83, nr 4
• Strony: 537--546
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Brei V. V.

autor

Melezhyk A. V.

autor

Prudius S. V.

autor

Oranskaya E. I.

• Institute for Sorption and Endoecology Problems of the National Academy of Sciences of Ukraine General Naumov Str., 13, Kyiv 03164, Ukraine tel.: [phone]; fax: [phone],

Bibliografia

• 1. Hino M. and Arata K., J. Chem. Soc, Chem. Commun., 18, 12590 (1988).
• 2. Barton D.G., Soled S.L. and Iglesia E., Topics in Catalysis, 6, 87 (1998).
• 3. Sakthivel R., Prescott H. and Kemnitz E., J. Mol. Catal. A Chem., 223, 137 (2004).
• 4. Brei V.V., Shistka D.V. and Prudius S.V., Kataliz I Neftekhimia (Ukraine), 15, 67 (2007).
• 5. Mobil Oil Corp., U.S. Pat. 5,345,026 (1994); 5,449,847 (1995); 5,516954 (1996); 5,563,310 (1996); 5,608,133 (1997).
• 6. Barton D.G., Shtein M., Wilson R.D., Soled S.L. and Iglesia E., J. Phys. Chem. B, 103, 630 (1999).
• 7. Cortes-Jacome M.A., Toledo J.A., Armendariz H., Hernandez I. and Bokhimi X., J. Solid State Chem., 164, 339 (2002).
• 8. Cortes-Jacome M.A., Toledo J.A., Angeles-Chavez C, Aguilar M. and Wang J.A., J. Phys. Chem. B, 109, 22730 (2005).
• 9. Pechini M. and Adams N., U.S. Pat. 3,330,697 (1967).
• 10. Brei V.V., Melezhyk O.V., Prudius S.V., Levchuk N.N. and Patrylak K.I., Stud. Surf. Sci. Catal, 143,387 (2002).
• 11. Chariot G., Les Méthodes de la Chimie Analytique. Analyse quantitative minérale; Quatrième edition Masson Et Cie, Editeurs, 1961, p. 600.
• 12. Valigi M., Gazzoli D., Pettiti I., Mattei G., Colonna S., De Rossi S. and Ferraris G., Appl. Catal. A: General, 231, 159 (2002).
• 13. Lauron-Pernot H., Luck F. and Popa J.M., Appl. Catal. A: General, 78, 213 (1991).
• 14. Cortes-Jacome M.A., Angeles-Chavez C, Lopez-Salinas E., Navarrete J., Toribio P. and Toledo J.A., Appl. Catal. A: General, 318, 178 (2007).
• 15. Cortes-Jacome M. A., Angeles-Chavez C, Bokhimi X. and Toledo-Antonio J.A., J. Solid State Chem., 179, 2663 (2006).
• 16. Gutierrez-Alejandre A., Castillo P., Ramirez J., Ramis G. and Busca G., Appl. Catal. A: General, 216, 181 (2001).
• 17. Brei V.V., Melezhyk O.V., Prudius S.V. and Tel'biz G.M., Ads. Sci. Tech., 23, 109 (2005).