Hostname: page-component-76fb5796d-22dnz Total loading time: 0 Render date: 2024-04-29T17:22:08.602Z Has data issue: false hasContentIssue false
  • English
  • Français

Surface Models of Alumina Supported Copper Oxide Prepared by Laser Ablation: Dispersion and Electron Structure Changes Following Reduction and Oxidation Cycles

Published online by Cambridge University Press:  15 February 2011

B. Hirschauer  and
J. Paul
B. Hirschauer
Affiliation:
KTH/the Royal Institute of Technology, Physics III, 100 44 Stockholm, Sweden
J. Paul*
Affiliation:
KTH/the Royal Institute of Technology, Physics III, 100 44 Stockholm, Sweden
*
§ For correspondence
Get access

Abstract

We have explored and developed laser ablation as a tool to synthesize realistic planar models of high surface area catalysts as well as novel materials, not accessible with wet chemical methods. The process is illustrated by data for dispersion and electron structure modifications following thermal treatments of alumina supported copper oxide. Planar models of different wet and dry carrier/overlayer combinations were prepared and exposed to oxidizing and reducing atmosphere at 500°C. Characterization was made by XPS/ESCA. The data reveal the importance of surface hydroxyl groups in the two initial components to control coalescence and interdiffusion. The ablation route is part of our ongoing DENOX project and comparisons are made with other materials, tested for their materials properties and catalytic behavior in HC/NO reactions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 368: Symposium T – Synthesis and Properties of Advanced Catalytic Materials , 1994 , 237
Copyright
Copyright © Materials Research Society 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Pradier, C. M and Paul, J., Proceedings Europcat-I, Montpellier, France; C.M. Pradier, H. Vikström, and J. Paul, Proceedings CAPOC 3, Brussels, Belgium; J. Paul, 1st World Conference on Environmental Catalysis, Pisa, Italy (accepted); J.Paul and L.O. Öhman, JECAT'95, Lyon, France (accepted); H. Lu, C.M. Pradier, and J.Paul, JECAT'95, Lyon, France (accepted); J.Paul, 10th World Clean Air Conference, Helsinki, Finland (accepted).Google Scholar
2. Ertl, G., Hierl, R., Knözinger, H., Thiele, N., and Urbach, H.R., Appl.Surface, Sci. 5 (1980) 49;G. Centi, C. Nigro, S. Perathoner, and G. Stella, in Environmental Catalysis, Ed. J. N. Armor (ACS Symposium Series 552, Washington, 1994); US-DOE Final Report Contract No.22-89PC89805 (Artur D. Little Co., Cambridge/MA, 1994).Google Scholar
3. Paul, J., Pradier, C.M., Levola, T., Supponen, E., and Vanhatalo, J., Rev.Sci.Instrum. (submitted).Google Scholar
4. Hirschauer, B., Söderholm, S., and Paul, J. (manuscript).Google Scholar
5. Laser Ablation for Materials Synthesis, MRS Symposium Procedings 191, Eds. D., C Paine and Bravman, J.C. (MRS, Pittsburgh, 1990);Laser Ablation in Materials Processing: Fundamentals and Applications, MRS Symposium Proceedings 285, Eds. B. Braren, J.J. Dubrowski, and D.P. Norton, (MRS, Pittsburgh, 1992).Google Scholar
6. Hirschauer, B., öhman, L.O., and Paul, J., (manuscript).Google Scholar