Abstract
The genesis and subsequent sintering in a hydrogen atmosphere of realistic Cu/amorphous silica planar model catalysts have been investigated by atomic force microscopy. Samples were prepared by standard wet chemical methods followed by calcination and reduction, mimicking as closely as possible the procedures used in the preparation of practical, dispersed Cu catalysts. Changes in size distribution and mean particle size are observed as the sequence of transformations, Cu nitrate → cupric oxide → Cu metal, proceeds and an interpretation is offered. Pronounced sintering in hydrogen is the result of migration, agglomeration and coalescence of entire Cu particles, as opposed to Ostwald ripening. A mechanism for this process is proposed on the basis of absorption/desorption of hydrogen at steady state.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D. P. C. Bird, C. M. C. de Castilho and R. M. Lambert, Surf. Sci. 449 (2000) L221.
S. Wodiunig, J. M. Keel, T. S. E. Wilson, F. W. Zemichael and R. M. Lambert, Catal. Lett. 87 (2003) 1.
X. Xu, S. M. Vesecky and D. W. Goodman, Science 258 (1992) 788.
X. Xu, S. M. Vesecky, J. W. He and D. W. Goodman, J. Vac. Sci. Technol., A11 (1993) 1930.
R. van Wijk, O. L. J. Gijzeman, J. W. Geus, E. ten Grotenhuis and J. C. van Miltenburg, Catal. Lett. 24 (1994) 171.
R. A. Hadden, B. Sakakini, J. Tabatabbei and K. C. Waugh, Catal. Lett. 44 (1997) 145.
K. C. Waugh, Catal. Lett. 58 (1999) 163.
A. J. Elliott, M. J. Watson, J. Tabatabei, F. W. Zemichael and K. C. Waugh, Catal. Lett. 79 (2002) 1.
G. J. Millar, C. H. Rochester and K. C. Waugh, Catal. Lett. 14 (1992) 289.
A. J. Elliott, B. Sakakini, J. Tabatabei, K. C. Waugh, F. W. Zemichael and R. A. Hadden, J. Chem. Soc. Faraday Trans. 91 (1995) 3659.
G. C. Chinchen, K. C. Waugh and D. A. Whan, Appl. Catal. 25 (1986) 101.
G. C. Chinchen, M. S. Spencer, K. C. Waugh and D. A. Whan, Appl. Catal. 32 (1987) 371.
A. Ishizaka and Y. Shiraki, J. Electrochem. Soc. 133 (1986) 666.
W. Kern, J. Electrochem. Soc. 137 (1990) 1887.
A. Ulman, An Introduction to Ultra-thin Organic Films: From Langmuir–Blodgett to Self-assembly (Academic Press, Boston, MA, 1991).
E. ten Grotenhuis, J. C. van Miltenburg, J. P. van der Eerden, R. van Wijk, O. L. J. Gijzeman, J. W. Geus and C. H. M. Maree, Catal. Lett. 28 (1994) 109.
A. Kolmakov and D. W. Goodman, Rev. Sci. Instrum. 74 (2003) 2444.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Williams, F.J., Malikova, N. & Lambert, R.M. An AFM Study of the Genesis and Sintering in Hydrogen of a Realistic Cu/Amorphous Silica Planar Model Catalyst. Catalysis Letters 90, 177–180 (2003). https://doi.org/10.1023/B:CATL.0000004115.92913.50
Issue Date:
DOI: https://doi.org/10.1023/B:CATL.0000004115.92913.50