Surface structure and catalytic performance of niobium oxides supported on titania
作者： Thomas Onfroy , Olga V. Manoilova , Saeed B. Bukallah , David M. Hercules , Guillaume Clet
DOI: 10.1016/J.APCATA.2006.09.021
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摘要: Abstract The surface structure and activity of catalytic systems based on niobium oxide supported titania were investigated. A series catalysts with Nb content up to 3.6 atoms/nm 2 was prepared by incipient wetness impregnation the support oxalate solutions. Characterization system X-ray diffraction (XRD) Raman spectroscopy studies did not show evidence formation. Surface analysis performed photoelectron (XPS), ion scattering (ISS), infrared spectroscopy. These results correlated Bronsted acidity determined in our previous study. direct correlation between abundance acid sites had been observed. Analysis showed a similar evolution for intensity band attributed polymerized NbO x .
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Jeffrey G. Weissman, Niobia-alumina supported hydroprocessing catalysts: relationship between activity and support surface acidity Catalysis Today. ,vol. 28, pp. 159- 166 ,(1996) , 10.1016/0920-5861(95)00222-7
Roberta Brayner, François Bozon-Verduraz, Niobium pentoxide prepared by soft chemical routes: morphology, structure, defects and quantum size effect Physical Chemistry Chemical Physics. ,vol. 5, pp. 1457- 1466 ,(2003) , 10.1039/B210055J
Jih Mirn Jehng, Israel E. Wachs, Structural chemistry and Raman spectra of niobium oxides Chemistry of Materials. ,vol. 3, pp. 100- 107 ,(1991) , 10.1021/CM00013A025
Kozo Tanabe, Catalytic application of niobium compounds Catalysis Today. ,vol. 78, pp. 65- 77 ,(2003) , 10.1016/S0920-5861(02)00343-7
A.T. Bell, R.M. Pittman, Raman studies of the structure of Nb[sub 2]O[sub 5]TiO[sub 2] The Journal of Physical Chemistry. ,(1993) , 10.1021/J100149A013
Rusty M. Pittman, Alexis T. Bell, Raman studies of the structure of niobium oxide/titanium oxide (Nb2O5.TiO2) The Journal of Physical Chemistry. ,vol. 97, pp. 12178- 12185 ,(1993) , 10.1021/J100149A013
Jih-Mirn Jehng, Israel E. Wachs, Molecular design of supported niobium oxide catalysts Catalysis Today. ,vol. 16, pp. 417- 426 ,(1993) , 10.1016/0920-5861(93)80081-B
Thomas Onfroy, Guillaume Clet, Marwan Houalla, Correlations between acidity, surface structure, and catalytic activity of niobium oxide supported on zirconia. Journal of Physical Chemistry B. ,vol. 109, pp. 14588- 14594 ,(2005) , 10.1021/JP0517347
Susumu Okazaki, Tetsuhiro Okuyama, Nb2O5 supported on TiO2. catalytic activity for reduction of NO with NH3 Bulletin of the Chemical Society of Japan. ,vol. 56, pp. 2159- 2160 ,(1983) , 10.1246/BCSJ.56.2159
Xingtao Gao, Israel E. Wachs, Michael S. Wong, Jackie Y. Ying, Structural and Reactivity Properties of Nb-MCM-41: Comparison with That of Highly Dispersed Nb2O5/SiO2 Catalysts Journal of Catalysis. ,vol. 203, pp. 18- 24 ,(2001) , 10.1006/JCAT.2001.3313