View PDF Version
 
DOI: 10.1039/A807403H (Paper) Reference Section for: Chem. Commun., 1999, 269-270

Epitaxial growth of WO3–x needles on (10 [1 with combining macron]0) and (01 [1 with combining macron]0) WC surfaces produced by controlled oxidation with CO2

(Note: The full text of this document is currently only available in the PDF Version )

Andrew P. E. York, Jeremy Sloan, Malcolm L. H. Green and Jeremy Sloan

Abstract

The controlled oxidation with CO2 of both high surface area (high Sg) and low surface area WC to form WO3–x needles, has been observed in situ, inside a controlled environment transmission electron microscope (CETEM), and also ex situ, in a standard flow reactor; the tungsten oxide needles, which consist mainly of distorted γ-WO2.72, propagate in an epitaxial fashion from the (10 [1 with combining macron]0) and (01 [1 with combining macron]0) surfaces of the parent WC crystals; possible mechanisms for the formation of the needles are proposed.

References

  1. A. P. E. York, J. B. Claridge, A. J. Brungs, S. C. Tsang and M. L. H. Green, Chem. Commun., 1997, 39 RSC.
  2. A. P. E. York, J. B. Claridge, A. J. Brungs, S. C. Tsang and M. L. H. Green, Stud. Surf. Sci. Catal., 1997, 110, 711 CAS.
  3. A. G. Basrur, S. R. Patwardhan and S. N. Vyas, J. Catal., 1991, 127, 86 CAS.
  4. S. Passerini, B. Scrosati, V. Hermann, C. Holmblad and T. Bartlett, J. Electrochem. Soc., 1994, 141, 1025 CAS.
  5. H. T. Sun, C. Cantalini, L. Lozzi, M. Passacantando, S. Santucci and M. Pelino, Thin Solid Films, 1996, 287, 258 CrossRef CAS.
  6. R. Tenne, L. Margulis, M. Genut and G. Hodes, Nature, 1993, 360, 444 CrossRef.
  7. L. Margulis, G. Salitra, R. Tenne and M. Talianker, Nature, 1993, 365, 113 CrossRef CAS.
  8. M. Homyonfer, B. Alperson, Y. Rosenberg, L. Sapir, S. R. Cohen, G. Hodes and R. Tenne, J. Am. Chem. Soc., 1997, 119, 2693 CrossRef CAS.
  9. R. C. Doole, G. M. Parkinson and J. M. Stead, Inst. Phys. Conf. Series, 1991, 119, 157 Search PubMed.
  10. R. C. Doole, G. M. Parkinson, J. L. Hutchison, M. J. Goringe and P. J. F. Harris, JEOL News, 1992, 30E, 14 Search PubMed.
  11. A. Magnéli, Ark. Kemi, 1949, 1, 223 Search PubMed.
  12. A. Magnéli, Powder Diffraction File card 5-392 (ASTM, Philadelphia Pennsylvania).
  13. P. A. Stadelmann, Ultramicroscopy, 1987, 21, 131 CrossRef CAS.
  14. J. B. Claridge, A. P. E. York, A. J. Brungs, C. Márquez-Alvarez, J. Sloan, S. C. Tsang and M. L. H. Green, J. Catal., 1998, 180, 85 CrossRef CAS.
  15. Gmelins Handbuch der Anorganischen Chemie, ed. R. J. Meyer, Verlag Chemie, Berlin, 1933, vol. 54, p. 122 Search PubMed.
Click here to see how this site uses Cookies. View our privacy policy here.