Structural determination of copper species on the alumina-supported copper chloride catalyst: a detailed EXAFS study
作者： C. Prestipino , S. Bordiga , C. Lamberti , S. Vidotto , M. Garilli
DOI: 10.1021/JP027507B
关键词:
摘要: We present a methodology that allows us to extract quantitative information from EXAFS data collected on complex samples where the absorbing species is in more than one phase. have chosen as our case study CuCl2/Al2O3 material, which represents basic catalyst for ethylene oxychlorination reaction (a fundamental intermediate step PVC production). In previous studies [J. Catal. 2000, 189, 91, and J. 105], it has been shown three different copper are CuCl2/Al2O3a Cu-aluminate phase, highly dispersed chloride an aggregated paratacamite (Cu2(OH)3Cl) whose relative fraction depends loading, sample aging, heating conditions. this work, we spectra of phases ground. A corresponding XANES qualitatively support results. This generalization standard procedure that...
acs.org
sci-hub.se 参考文章(50)
P. Avila, J. Blanco, J.L. Garcia-fierro, S. Mendioroz, J. Soria, Active Phase Characterization of Oxychlorination Catalysts Studies in Surface Science and Catalysis. ,vol. 7, pp. 1031- 1039 ,(1981) , 10.1016/S0167-2991(08)64712-6
G Leofanti, A Marsella, B Cremaschi, M Garilli, A Zecchina, G Spoto, S Bordiga, P Fisicaro, G Berlier, C Prestipino, G Casali, C Lamberti, Alumina-supported copper chloride: 3. Effect of exposure to ethylene Journal of Catalysis. ,vol. 202, pp. 279- 295 ,(2001) , 10.1006/JCAT.2001.3304
R.J. Ott, A. Baiker, Impregnation Of Y-Alumina With Copper Chloride. Equilibrium Behaviour, Impregnation Profiles And Immobilization Kinetics Studies in Surface Science and Catalysis. ,vol. 16, pp. 685- 696 ,(1983) , 10.1016/S0167-2991(09)60059-8
J. Valle, A. Vargas, J.M. Ferreira, A. Flores, O. Novaro, The Nature of the Active-Site of Oxychlorination Catalysts (CuCl2/Al2O3) Through Experimental Studies Studies in Surface Science and Catalysis. ,vol. 7, pp. 1040- 1046 ,(1981) , 10.1016/S0167-2991(08)64713-8
Geoffrey C. Bond, Stephen N. Namijo, John S. Wakeman, Thermal analysis of catalyst precursors Journal of Molecular Catalysis. ,vol. 64, pp. 305- 319 ,(1991) , 10.1016/0304-5102(91)85140-W
M. E. Fleet, The crystal structure of paratacamite, Cu2(OH)3Cl Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. ,vol. 31, pp. 183- 187 ,(1975) , 10.1107/S0567740875002324
T. A. Tyson, K. O. Hodgson, C. R. Natoli, M. Benfatto, General multiple-scattering scheme for the computation and interpretation of x-ray-absorption fine structure in atomic clusters with applications to SF6, GeCl4, and Br2 molecules. Physical Review B. ,vol. 46, pp. 5997- 6019 ,(1992) , 10.1103/PHYSREVB.46.5997
J Garcia, J Blasco, MC Sanchez, MG Proietti, G Subias, Lack of Atomic Charge Localization in Transition Metal Mixed Valence Oxides Surface Review and Letters. ,vol. 09, pp. 821- 830 ,(2002) , 10.1142/S0218625X02001835
J BLANCO, Study of supported copper chloride catalysts by electron paramagnetic resonance and X-ray diffraction Journal of Catalysis. ,vol. 31, pp. 257- 263 ,(1973) , 10.1016/0021-9517(73)90332-1
Yves Joly, Delphine Cabaret, Hubert Renevier, Calogero R. Natoli, Electron Population Analysis by Full-Potential X-Ray Absorption Simulations Physical Review Letters. ,vol. 82, pp. 2398- 2401 ,(1999) , 10.1103/PHYSREVLETT.82.2398