Global and Local Structure of Supported Pd Catalysts
The supported Pd catalysts were analyzed by X-ray
diffraction and X-ray absorption spectroscopy in order to determine
their global and local structure. The average particle size of the
supported Pd catalysts was determined by X-ray diffraction method.
One of the main purposes of the present contribution is to focus on
understanding the specific role of the Pd particle size determined by
X-ray diffraction and that of the support oxide. Based on X-ray
absorption fine structure spectroscopy analysis we consider that the
whole local structure of the investigated samples are distorted
concerning the atomic number but the distances between atoms are
almost the same as for standard Pd sample. Due to the strong
modifications of the Pd cluster local structure, the metal-support
interface may influence the electronic properties of metal clusters
and thus their reactivity for absorption of the reactant molecules.
[1] C. Sachs, A. Pundt, R. Kirchheim, M. Winter, M. T. Reetz, and D.
Fritsch, "Solubility of hydrogen in single-sized palladium clusters",
Phys. Rev. B, vol. 64, 075408, 2001.
[2] M. Suleiman, N. M. Jisrawi, O. Dankert, M. T. Reetz, C. Bähtz, R.
Kirchheim and A. Pundt, "Phase transition and lattice expansion during
hydrogen loading of nanometer sized palladium clusters" J. Alloys and
Compounds, vol. 356-357, pp. 644-648, 2003.
[3] V. Ferrer, D. Finol, D. Rodriguez, F. Dominguez, R. Solano, J. Zarraga
and J. Sanchez, "Chemical Characterization and Catalytic Activity of
Pd-Supported Catalysts on Ce0.39Zr0.61Ox/SiO2", Catal Lett, vol. 132, pp.
292-298, 2009.
[4] Q. Zhu, B. Shen, H. Ling, R. Gu, "Effect of Various Supports on the
Catalytic Activity of Pd for Cumene Hydroperoxide Hydrogenation",
Catal Lett, vol. 132, pp. 464-471, 2009.
[5] Y. Li, Y. Xie and C. Liu, "Enhanced Activity of Bimetallic Pd-Based
Catalysts for Methane Combustion", Catal Lett, vol. 125, pp. 130-133,
2008.
[6] R. Gopinath, N. S. Babu, J. V. Kumar, N. Lingaiah and P. S. Sai Prasad,
"Influence of Pd Precursor and Method of Preparation on
Hydrodechlorination Activity of Alumina Supported Palladium
Catalysts", Catal Lett, vol. 120, pp. 312-319, 2008.
[7] S. Guerrero, P. Araya and Eduardo E. Wolf , "Methane oxidation on Pd
supported on high area zirconia catalysts", Applied Catalysis A:
General, vol. 298, pp. 243-253, 2006.
[8] C. Amorim, G. Yuan, P. M. Patterson and M. A. Keane, "Catalytic
hydrodechlorination over Pd supported on amorphous and structured
carbon", Journal of Catalysis, vol. 234, pp. 268-281, 2005.
[9] N. Aldea, R. Turcu, A. Nan, I. Craciunescu, O. Pana, X. Yaning,
Zhonghua Wu, D. Bica, L. Vekas and F. Matei, "Investigation of
nanostructured Fe3O4 polypyrrole core-shell composites by X-ray
absorption spectroscopy and X-ray diffraction using synchrotron
radiation", J.Nanopart. Res., vol. 11, pp. 1429-1439, 2009.
[10] E. A. Stern, "Theory of EXAFS" in X-ray absorption: principles,
applications, techniques of EXAFS, SEXAFS and XANES, D.C.
Koningsberger, R. Prins, Ed. New York: Weley, 1988.
[11] A. San-Miguel, "A program for fast classic or dispersive XAS data
analysis in a PC", Physica B., vol. 208&209, pp. 177-179, 1995.
[12] J. J. Rehr, J. Mustre de Leon, S. I. Zabinsky, R. C. Albers, "Theoretical
x-ray absorption fine structure standards", J. Am. Chem. Soc., vol. 113,
no. 14, pp. 5135-5140, 1991.
[13] B. E. Warren, "Diffraction by imperfect crystals" in X-Ray Diffraction,
Ed. New York: Dover Publication, pp. 251-254, 1990.
[14] H.P. Klug and L.E. Alexander, "X-Ray Diffraction Procedures for
Polycrystalline and Amorphous Materials", 2nd ed., Ed. New York: John
Wiley and Sons, 1974, pp. 618-708.
[15] D. Balzar, "X Ray Diffraction Line Broadening: Modelling and
Applications to High -Tc Superconductors", J. Res. Nat. Inst. Stand.
Technol., vol. 98, pp. 321-353, 1993.
[16] N. Aldea, A. Gluhoi, P. Marginean, C. Cosma and X. Yaning, "Extended
X-ray absorption fine structure and X-ray diffraction studies on
supported nickel catalysts", Spectrochim. Acta B, vol. 55, pp. 997-1008,
2000.
[17] D. C. Koningsberger and B. C. Gates, "Nature of the metal-support
interface in supported metal catalysts: results from X-ray absorption
spectroscopy", Catal. Lett., vol. 14, pp. 271-277, 1992.
[18] C. H. Lin, S. H. Hsu, M.Y. Lee and S. D. Lin, "Active morphology of
Au/╬│-Al2O3-a model by EXAFS", J. Catal., vol. 209, pp. 62-68, 2002.
[19] R. Zanella, S. Giorgio, C. H. Shin, C. R. Henry, and C. Louis,
"Characterization and reactivity in CO oxidation of gold nanoparticles
supported on TiO2 prepared by deposition-precipitation with NaOH and
urea", J. Catal., vol. 222, pp. 357-367, 2004.
[1] C. Sachs, A. Pundt, R. Kirchheim, M. Winter, M. T. Reetz, and D.
Fritsch, "Solubility of hydrogen in single-sized palladium clusters",
Phys. Rev. B, vol. 64, 075408, 2001.
[2] M. Suleiman, N. M. Jisrawi, O. Dankert, M. T. Reetz, C. Bähtz, R.
Kirchheim and A. Pundt, "Phase transition and lattice expansion during
hydrogen loading of nanometer sized palladium clusters" J. Alloys and
Compounds, vol. 356-357, pp. 644-648, 2003.
[3] V. Ferrer, D. Finol, D. Rodriguez, F. Dominguez, R. Solano, J. Zarraga
and J. Sanchez, "Chemical Characterization and Catalytic Activity of
Pd-Supported Catalysts on Ce0.39Zr0.61Ox/SiO2", Catal Lett, vol. 132, pp.
292-298, 2009.
[4] Q. Zhu, B. Shen, H. Ling, R. Gu, "Effect of Various Supports on the
Catalytic Activity of Pd for Cumene Hydroperoxide Hydrogenation",
Catal Lett, vol. 132, pp. 464-471, 2009.
[5] Y. Li, Y. Xie and C. Liu, "Enhanced Activity of Bimetallic Pd-Based
Catalysts for Methane Combustion", Catal Lett, vol. 125, pp. 130-133,
2008.
[6] R. Gopinath, N. S. Babu, J. V. Kumar, N. Lingaiah and P. S. Sai Prasad,
"Influence of Pd Precursor and Method of Preparation on
Hydrodechlorination Activity of Alumina Supported Palladium
Catalysts", Catal Lett, vol. 120, pp. 312-319, 2008.
[7] S. Guerrero, P. Araya and Eduardo E. Wolf , "Methane oxidation on Pd
supported on high area zirconia catalysts", Applied Catalysis A:
General, vol. 298, pp. 243-253, 2006.
[8] C. Amorim, G. Yuan, P. M. Patterson and M. A. Keane, "Catalytic
hydrodechlorination over Pd supported on amorphous and structured
carbon", Journal of Catalysis, vol. 234, pp. 268-281, 2005.
[9] N. Aldea, R. Turcu, A. Nan, I. Craciunescu, O. Pana, X. Yaning,
Zhonghua Wu, D. Bica, L. Vekas and F. Matei, "Investigation of
nanostructured Fe3O4 polypyrrole core-shell composites by X-ray
absorption spectroscopy and X-ray diffraction using synchrotron
radiation", J.Nanopart. Res., vol. 11, pp. 1429-1439, 2009.
[10] E. A. Stern, "Theory of EXAFS" in X-ray absorption: principles,
applications, techniques of EXAFS, SEXAFS and XANES, D.C.
Koningsberger, R. Prins, Ed. New York: Weley, 1988.
[11] A. San-Miguel, "A program for fast classic or dispersive XAS data
analysis in a PC", Physica B., vol. 208&209, pp. 177-179, 1995.
[12] J. J. Rehr, J. Mustre de Leon, S. I. Zabinsky, R. C. Albers, "Theoretical
x-ray absorption fine structure standards", J. Am. Chem. Soc., vol. 113,
no. 14, pp. 5135-5140, 1991.
[13] B. E. Warren, "Diffraction by imperfect crystals" in X-Ray Diffraction,
Ed. New York: Dover Publication, pp. 251-254, 1990.
[14] H.P. Klug and L.E. Alexander, "X-Ray Diffraction Procedures for
Polycrystalline and Amorphous Materials", 2nd ed., Ed. New York: John
Wiley and Sons, 1974, pp. 618-708.
[15] D. Balzar, "X Ray Diffraction Line Broadening: Modelling and
Applications to High -Tc Superconductors", J. Res. Nat. Inst. Stand.
Technol., vol. 98, pp. 321-353, 1993.
[16] N. Aldea, A. Gluhoi, P. Marginean, C. Cosma and X. Yaning, "Extended
X-ray absorption fine structure and X-ray diffraction studies on
supported nickel catalysts", Spectrochim. Acta B, vol. 55, pp. 997-1008,
2000.
[17] D. C. Koningsberger and B. C. Gates, "Nature of the metal-support
interface in supported metal catalysts: results from X-ray absorption
spectroscopy", Catal. Lett., vol. 14, pp. 271-277, 1992.
[18] C. H. Lin, S. H. Hsu, M.Y. Lee and S. D. Lin, "Active morphology of
Au/╬│-Al2O3-a model by EXAFS", J. Catal., vol. 209, pp. 62-68, 2002.
[19] R. Zanella, S. Giorgio, C. H. Shin, C. R. Henry, and C. Louis,
"Characterization and reactivity in CO oxidation of gold nanoparticles
supported on TiO2 prepared by deposition-precipitation with NaOH and
urea", J. Catal., vol. 222, pp. 357-367, 2004.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:60236", author = "V. Rednic and N. Aldea and P. Marginean and D. Macovei and C. M. Teodorescu and E. Dorolti and F. Matei", title = "Global and Local Structure of Supported Pd Catalysts", abstract = "The supported Pd catalysts were analyzed by X-ray
diffraction and X-ray absorption spectroscopy in order to determine
their global and local structure. The average particle size of the
supported Pd catalysts was determined by X-ray diffraction method.
One of the main purposes of the present contribution is to focus on
understanding the specific role of the Pd particle size determined by
X-ray diffraction and that of the support oxide. Based on X-ray
absorption fine structure spectroscopy analysis we consider that the
whole local structure of the investigated samples are distorted
concerning the atomic number but the distances between atoms are
almost the same as for standard Pd sample. Due to the strong
modifications of the Pd cluster local structure, the metal-support
interface may influence the electronic properties of metal clusters
and thus their reactivity for absorption of the reactant molecules.", keywords = "metal-support interaction, supported metal catalysts,synchrotron radiation, X-ray absorption spectroscopy, X-raydiffraction", volume = "5", number = "7", pages = "623-5", }
