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In-situ Pair Distribution Function Study of the Growth of Supported Platinum Particles in Zeolite X

Published online by Cambridge University Press:  03 November 2014

Liliana M. Gámez ,
Oscar Resto  and
Maria M. Martinez-Inesta
Liliana M. Gámez
Affiliation:
University of Puerto Rico-Mayaguez, Chemical Engineering Department PO Box 9000 Mayaguez, PR 00681 U.S.A.
Oscar Resto
Affiliation:
University of Puerto Rico-Rio Piedras, Physics Department PO Box 70377 San Juan PR 00931 U.S.A.
Maria M. Martinez-Inesta
Affiliation:
University of Puerto Rico-Mayaguez, Chemical Engineering Department PO Box 9000 Mayaguez, PR 00681 U.S.A.
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Abstract

Platinum particles supported in zeolites are used as catalysts for hydrogenation/ dehydrogenation reactions. In this study in situ high energy synchrotron X-ray diffraction was used to study the Pt particle formation under calcination and reduction conditions using time resolved pair distribution function (PDF). Because these particles grow inside the pores of zeolite X, PDF is able to give insight to unique information at the short and medium interatomic distance range that cannot be readily obtained with other techniques. Among the information obtained are the Pt atom interactions during calcination and the evolvement of the Pt particle sizes and average Pt-Pt distances during reduction.

Keywords

Ptzeolitex-ray diffraction (XRD)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1712: Symposium ZZ/AAA/BBB – Recent Advances in the Structural Characterization of Materials , 2014 , mrss14-1712-aaa08-04
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

Gates, B. C. Supported metal clusters: synthesis, structure, and catalysis. Chem. Rev. 95, 511–522 (1995).CrossRefGoogle Scholar
Akdogan, Y. et al. . Platinum species in the pores of NaX, NaY and NaA zeolites studied using EPR, XAS and FTIR spectroscopies. Phys. Chem. Chem. Phys. 10, 2952 (2008).CrossRefGoogle ScholarPubMed
Degraaf, J., Vandillen, A., Dejong, K. & Koningsberger, D. Preparation of Highly Dispersed Pt Particles in Zeolite Y with a Narrow Particle Size Distribution: Characterization by Hydrogen Chemisorption, TEM, EXAFS Spectroscopy, and Particle Modeling. J. Catal. 203, 307–321 (2001).CrossRefGoogle Scholar
Guerin, M., Kappenstein, C., Alvarez, F., Giannetto, G. & Guisnet, M. Preparation of PtHY catalysts: Influence on the catalytic properties of the complexes used as platinum precursors. Appl. Catal. 45, 325–333 (1988).CrossRefGoogle Scholar
Billinge, S. J. L. & Levin, I. The Problem with Determining Atomic Structure at the Nanoscale. Science 316, 561–565 (2007).CrossRefGoogle ScholarPubMed
Martinez-Inesta, M. A. M. & Lobo, R. F. Investigation of the structure of platinum clusters supported in zeolite beta using the pair distribution function. J. Phys. Chem. C 111, 8573–8579 (2007).CrossRefGoogle Scholar
Chupas, P. J., Chapman, K. W., Chen, H. & Grey, C. P. Application of high-energy X-rays and Pair-Distribution-Function analysis to nano-scale structural studies in catalysis. Catal. Today 145, 213–219 (2009).CrossRefGoogle Scholar
Zhao, H., Nenoff, T. M., Jennings, G., Chupas, P. J. & Chapman, K. W. Determining Quantitative Kinetics and the Structural Mechanism for Particle Growth in Porous Templates. J. Phys. Chem. Lett. 2, 2742–2746 (2011).CrossRefGoogle Scholar
Hammersley, A. P.; Svensson, S. O.; Thompson, A.; Graafsma, H.; Kvick, A.; Moy, J. P., Calibration and correction of distortions in two-dimensional detector systems[sup a)]. Review of Scientific Instruments 1995, 66 (3), 2729–2733.CrossRefGoogle Scholar
Qiu, X.; Thompson, J. W.; Billinge, S. J. L., PDFgetX2: a GUI-driven program to obtain the pair distribution function from X-ray powder diffraction data. Journal of Applied Crystallography 2004, 37 (4), 678–678.CrossRefGoogle Scholar
Farrow, C. L.; Juhas, P.; Liu, J. W.; Bryndin, D.; Božin, E. S.; Bloch, J.; Th, P.; Billinge, S. J. L., PDFfit2 and PDFgui: computer programs for studying nanostructure in crystals. Journal of Physics: Condensed Matter 2007, 19 (33), 335219.Google ScholarPubMed
Deutsch, S. E.; Miller, J. T.; Tomishige, K.; Iwasawa, Y.; Weber, W. A.; Gates, B. C., Supported Ir and Pt Clusters: Reactivity with Oxygen Investigated by Extended X-ray Absorption Fine Structure Spectroscopy. The Journal of Physical Chemistry 1996, 100 (32), 13408–13415.CrossRefGoogle Scholar
Pandya, K. I.; Heald, S. M.; Hriljac, J. A.; Petrakis, L.; Fraissard, J., Characterization by EXAFS, NMR, and Other Techniques of Pt/NaY Zeolite at Industrially Relevant Low Concentration of Platinum. The Journal of Physical Chemistry 1996, 100 (12), 5070–5077.CrossRefGoogle Scholar
Masadeh, A. S.; Božin, E. S.; Farrow, C. L.; Paglia, G.; Juhas, P.; Billinge, S. J. L.; Karkamkar, A.; Kanatzidis, M. G., Quantitative size-dependent structure and strain determination of CdSe nanoparticles using atomic pair distribution function analysis. Physical Review B 2007, 76 (11), 115413.CrossRefGoogle Scholar