Abstract
Bulk metals are used in only a few processes as catalysts where a reasonably high surface area is stabilized by so-called structural promoters. The most prominent example of this class of catalysts is undoubtedly the NH3 synthesis catalyst.1,2 Since metals, in particular noble metals, have high surface free energies, they tend to aggregate unless small particles can be stabilized by placing them on the surface of suitable supports. This class of supported metal catalysts is technologically extremely important. They are efficiently used in selective hydrogénations,3,4 the control of motor-vehicle exhaust gases (three-way catalyst)5 and in catalytic reforming.6–8 High metal surface areas can be obtained when small metal particles are stabilized on support surfaces in high dispersion.9,10 Dispersion is defined as the fraction of metal atoms being exposed. For example, a Pt particle with a diameter of about 1 nm contains less than 50 atoms und has a dispersion close to 100%. This is particularly important for the catalytically highly active, but very expensive noble metals. For economic reasons one has to achieve optimal catalytic efficiency per unit mass of noble metal, and hence, small particles providing high dispersion are demanded. Platinum is in fact one of the most widely used noble metals in catalysis. It finds application in car exhaust catalysts, 5 in hydrogenations 3,4 and catalytic reforming.6-8
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References
J. S. Merriam and K. Atwood, in: “Applied Industrial Catalysis”, Vol. 3, p. 113, B. C. Leach, ed., Academic Press, New York, London, 1983.
G. Ertl, in: “Catalytic Ammonia Synthesis”, J. R. Jennings, ed., Plenum Press, New York, in print.
R. L. Augustine, “Catalytic Hydrogénation”, M. Dekker, New York, 1965.
G. Webb, in: “Catalysis”, Specialist Periodical Reports, Vol. 2, p. 145, Roy. Soc. Chem., London, 1978.
W. S. Briggs, in: “Applied Industrial Catalysis”, Vol. 3, p. 24, B. E. Leach, ed., Academic Press, New York, London, 1983.
B. C. Gates, J. R. Katzer and G. C. A. Schuit, “Chemistry of Catalytic Processes”, Mc Graw, New York, 1979.
M. D. Edgar, in: “Applied Industrial Catalysis”, Vol. 1, p. 124, B. E. Leach, ed., Academic Press, New York, London, 1983.
D. A. Dowden, in: “Catalysis”, Specialist Periodical Reports, Vol. 2, p. 1, Roy. Soc. Chem., London, 1978.
J. R. Anderson, “Structure of Metallic Catalysts”, Academic Press, New York, 1975.
K. Foger, in: “Catalysis-Science and Technology”, J. R. Anderson and M. Boudart, eds., Springer, Berlin, Heidelberg, New York, Vol. 6, p. 227, 1984.
S. A. Stevenson, J. A. Dûmesic, R. T. K. Baker and E. Ruckenstein, “Metal-Support Interactions in Catalysis, Sintering and Redispersion”, Chapman and Hall, London, 1987.
M. Che and C. O. Bennet, Adv. Catal. 36: 55 (1989).
B. C. Gates, L. Guczi and H. Knözinger, eds., “Metal Clusters in Catalysis”, Elsevier, Amsterdam, Oxford, New York, Tokyo, 1986.
H. H. Lamb, B. C. Gates and H. Knözinger, Anqew. Chem. Int. Ed. Engl. 27: 1127 (1988).
R. Psaro, R. Ugo, G. M. Zanderighi, B. Besson, A. K. Smith and J. M. Basset, J. Orqanomet. Chem. 213:215 (1981).
M. Deeba and B. C. Gates, J. Catal. 67:303 (1981);
H. Knözinger and Y. Zhao, J. Catal. 71:337 (1981).
L. D’Ornelas, A. Choplin, J. M. Basset, L.-Y. Hsu and S. Shore, Nouv. J. Chim. 9:155 (1985).
F. B. M. Duivenvoorden, D. C. Koningsberger, Y. S. Uh and B. C. Gates, J. Amer. Chem. Soc. 108:6254 (1986).
B. Tesche, E. Zeitler, E. A. Delgado and H. Knözinger, Proc. 40th Electron Microsc. Soc. Am. Meeting, Washington 1982, p. 658.
B. Tesche, E. A. Delgado and H. Knözinger, in preparation.
H. Knözinger, Y. Zhao, B. Tesche, R. Barth, R. Epstein, B. C. Gates and J. P. Scott, Faraday Disc. Chem. Soc.72:53 (1981).
R. Psaro and R. Ugo, in ref.13, p. 427.
J. M. Basset, B. Besson, A. Choplin, F. Hugues, M. Leconte, D. Rojas, A. K. Smith, A. Theolier, Y. Chauvin, D. Commereuc, R. Psaro, R. Ugo and G. M. Zanderighi, Fundam. Res. Homogeneous Catal. 4:19 (1984).
S. L. Cook, J. Evans, G. S. McNulty and G. N. Greaves, J. Chem. Soc. Dalton Trans. 7 (1986).
M. Deeba, J. P. Scott, R. Barth and B. C. Gates, J. Catal. 71:373 (1981)
R. Psaro, C. Dossi and R. Ugo, J. Mol. Catal. 21:331 (1983).
A. S. Fung, P. A. Tooley, M. J. Kelley and B. C. Gates, J. Chem. Soc. Chem. Commun. 371 (1988).
A. K. Smith, F. Hugues, A. Theolier, J. M. Basset, R. Ugo, G. M. Zanderighi, J. L. Bilhou, V. Bilhou-Bougnol and W. F. Graydon, Inorg. Chem. 18:3104 (1979).
J. M. Basset, A. Theolier, D. Commereuc and Y. Chauvin, J. Organomet. Chem. 279:147 (1985).
J. L. Robbins, J. Phys. Chem. 90:3381 (1986).
W. M. Bowser and W. H. Weinberg, J. Amer. Chem. Soc. 103:1453 (1981).
P. Chini, G. Longoni and V. G. Albano, Adv. Organomet. Chem. 14:285 (1976).
J. A. Connor, Top. Curr. Chem. 71:71 (1977).
E. L. Muetterties, T. N. Rhodin, E. Band, C. F. Brucker and W. R. Pretzer, Chem. Rev. 79:91 (1979).
L. Brewer, Science 161:115 (1968).
G. Ertl, in ref.13, p. 577.
H. F. J. van’t Blik, J. B. A. D. van Zon, T. Huizinga, J. C. Vis, D. C. Koningsberger and R. Prins, J. Amer. Chem. Soc. 107:3139 (1985).
M. Primet, J. Chem. Soc. Faraday Trans. I74:2570 (1978).
M. Zaki, G. Kunzmann, B. C. Gates and H. Knözinger, J. Phys. Chem. 91:1486 (1987).
T. Beutel and H. Knözinger, to be published.
P. Basu, D. Panayotov and J. T. Yates, Jr., J. Phys. Chem. 91:3133 (1987).
A. S. Fung, P. A. Tooley, M. J. Kelley and B. C. Gates, J. Chem. Soc. Chem. Commun. 371 (1988);
H. H. Lamb, T. R. Krause and B. C. Gates, J. Chem. Soc. Chem. Commun. 821 (1986);
H. H. Lamb and B. C. Gates, J. Amer. Chem. Soc. 108:821 (1986)
P. A. Jacobs, in ref.13, p. 357.
L. L. Sheu, H. Knözinger and W. M. H. Sachtler, Catal. Letters 2:129 (1989).
V. G. Albano, A. Ceriotti, P. Chini, G. Ciani, S. Martinengo and M. Anker, J. Chem. Soc. Chem. Commun. 859 (1975);
V. G. Albano, G. Ciani, S. Martinengo and S. Sironi, J. Chem. Soc. Dalton 978 (1976).
W. Vogel, Z. Zhang, W. M. H. Sachtler and H. Knözinger, to be published.
V. Gnutzmann and W. Vogel, J. Phys. Chem. 94:4991 (1990);
W. Vogel, J. Catal. 121:356 (1990).
Z. Zhang, H. Chen, L.-L. Sheu and W. M. H. Sachtler, J. Catal. 127:213 (1991).
R. A. van Santen, in: “Fundamental Aspects of Heterogeneous Catalysis by Particle Beams”, H. H. Brongersma and R. A. van Santen, eds., Plenum Press. New York, in print.
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Knözinger, H. (1992). Metal Clusters and Particles as Catalyst Precursors and Catalysts. In: Pacchioni, G., Bagus, P.S., Parmigiani, F. (eds) Cluster Models for Surface and Bulk Phenomena. NATO ASI Series, vol 283. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-6021-6_12
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DOI: https://doi.org/10.1007/978-1-4684-6021-6_12
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