View PDF Version
 
DOI: 10.1039/A900923J (Paper) Reference Section for: Chem. Commun., 1999, 851-852

In situ energy dispersive EXAFS (EDE) of low loaded Pt(acac)2/HI SiO2 catalyst precursors on a timescale of seconds and below

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

Steven G. Fiddy, Mark A. Newton, Judith M. Corker, Sandra Turin, Tom Campbell, John Evans, Andrew J. Dent and Guiseppe Salvini

Abstract

We demonstrate second and sub-second time resolved energy dispersive EXAFS (EDE) for in situ interrogation of phase changes in a supported metal catalyst precursor [(⩽5 wt%) Pt(acac)2/HI SiO2] during thermal decomposition and reduction; the formation of Pt particles is radically altered by the presence H2, in both kinetic and structural senses.

References

  1. R. Frahm, Nucl. Instrum. Methods A, 1988, 270, 578 CrossRef.
  2. B. S. Clausen, L. Grabaek, G. Steffensen, P. L. Hansen and H. Topsoe, Catal. Lett., 1993, 20, 23 CrossRef CAS.
  3. D. Hecht, R. Frahm and H. H. Strehblow, J. Phys. Chem., 1996, 100, 10 831 CrossRef CAS; N. Hilbrandt, R. Frahm and M. Martin, J. Phys. IV, 1997, 7, 727 Search PubMed.
  4. G. Sankar, J. M. Thomas, F. Rey and G. N. Greaves, J. Chem. Soc., Chem. Commun., 1995, 2549 RSC.
  5. F. Cimini and R. Prins, J. Phys. Chem. B, 1997, 101, 5277 CrossRef CAS.
  6. J. Als-Nielsen, G. Grubel and B. S. Clausen, Nucl. Instrum. Methods B, 1995, 97, 522 CrossRef CAS.
  7. J. W. Couves, J. M. Thomas, D. Waller, T. H. Jones, A. J. Dent, G. E. Derbyshire and G. N. Greaves, Nature, 1991, 354, 465 CrossRef CAS; R. P. Phizackerly, Z. V. Rek, G. V. Stephenson, S. Conradson, K. O. Hodgson, T. Matsushita and H. Oyanagi, J. Appl, Phys., 1983, 16, 161.
  8. For instance: (a) P. G. Allen, S. D. Conradson and J. E. Penner-Hahn, Appl. Crystallogr., 1993, 26, 172 Search PubMed; (b) M. Hagelstein, C. Ferrero, U. Hatje, T. Ressler and W. Metz, J. Synchrotron Radiat., 1995, 2, 174 CrossRef CAS; (c) D. Bogg, A. J. Dent, G. E. Derbyshire, R. C. Farrow, C. A. Ramsdale and G. Salvini, Nucl. Instrum. Methods A, 1997, 392, 461 CrossRef CAS; (d) A. Dent, J. Evans, M. Newton, J. Corker, A. Russell, M. B. Abdul Rahman, S. Fiddy, R. Matthew, R. Farrow and G. Salvini, J. Synchrotron Radiat., in press Search PubMed.
  9. For instance: J. W. Couves, J. M. Thomas, C. R. A. Catlow, G. N. Greaves, G. Baker and A. J. Dent, J. Phys. Chem., 1990, 94, 6517 Search PubMed; G. Sankar, J. M. Thomas, D. Waller, J. W. Couves, C. R. A. Catlow and G. N. Greaves, J. Phys. Chem., 1992, 96, 7485 CrossRef CAS; T. Ressler, M. Hagelstein, U. Hatje and W. Metz, J. Phys. Chem. B, 1997, 101, 6680 CrossRef CAS.
  10. (a) J. L. Van der Venne, J. P. M. Rindt and G. J. M. M. Coenen, J. Colloid. Interface Sci., 1990, 74, 287 CrossRef CAS; (b) W. C. Conner, E. L. Weist, T. Ito and J. Fraissard, J. Phys. Chem., 1989, 93, 4138 CrossRef CAS.
  11. V. Y. Gusev, X. B. Feng, Z. Bu, G. L. Haller and J. A. O'Brien, J. Phys. Chem., 1996, 100, 1985 [for structural degradation due to compression in mesopurous SiO2(MCM 41)].
  12. G. Attard, J. C. Clyde and C. G. Göltner, Nature, 1995, 378, 366 CrossRef CAS.
  13. N. Binsted, PAXAS Programme for the analysis of X-ray absorption spectra, University of Southampton, 1988.
  14. S. J. Gurman, N. Binsted and I. Ross, J. Phys. Chem., 1984, 17, 143; 1986, 19, 1845 Search PubMed.
  15. N. Binsted, EXCURV98, CCLRC Daresbury Laboratory computer programme, 1998.
  16. For instance, J. M. Corker, J. Evans, H. Leach and W. Levason, J. Chem. Soc., Chem. Commun., 1989, 181 Search PubMed.
Click here to see how this site uses Cookies. View our privacy policy here.