Abstract
A previously proposed model of strain in ceria–zirconia-encapsulated precious-metal particles is revised to reflect several new observations: encapsulation of unstrained Pt particles, quantitative relation between partial reduction and the change in ceria–zirconia cell parameters, temperature/time dependence of strain relaxation/imposition in encapsulated Pd and Rh particles, and strained PdO. According to the revised model, the main cause of strain is partial oxidation of the precious metal (rather than the change in oxygen content of ceria–zirconia, as originally suggested).
Similar content being viewed by others
References
G.W. Graham, H.-W. Jen, W. Chun and R.W. McCabe, Catal. Lett. 44 (1997) 185.
J.C. Jiang, X.Q. Pan, G.W. Graham, R.W. McCabe and J. Schwank, Catal. Lett. 53 (1998) 37.
H.-W. Jen, G.W. Graham, W. Chun, R.W. McCabe, J.-P. Cuif, S. Deutsch and O. Touret, Catal. Today 50 (1999) 309.
G.W. Graham, H.-W. Jen, W. Chun and R.W. McCabe, J. Catal. 182 (1999) 228.
G.W. Graham, H.-W. Jen, R.W. McCabe, A.M. Straccia and L.P. Haack, Catal. Lett. 67 (2000) 99.
A.R. Drews, in: Advances in X-ray Analysis, Proceedings of the Denver X-ray Conference, Vol. 44 (CD-ROM produced by the International Centre for Diffraction Data, 2001).
I. Barin, O. Knacke and O. Kubaschewski, Thermodynamic Properties of Inorganic Substances (Supplement) (Springer, 1977).
T.B. Reed, Free Energy of Formation of Binary Compounds: An Atlas of Charts for High-Temperature Chemical Calculations (MIT Press, 1971).
M.Yu. Smirnov and G.W. Graham, Catal. Lett. 72 (2001) 39.
G.W. Graham, A.E. O'Neill, D. Uy, W.H. Weber, H. Sun and X.Q. Pan, Catal. Lett. (in press).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Graham, G., Shigapov, A. Revised Model of Strain in Ceria–Zirconia-Encapsulated Precious-Metal Particles. Catalysis Letters 81, 253–257 (2002). https://doi.org/10.1023/A:1016597511067
Issue Date:
DOI: https://doi.org/10.1023/A:1016597511067