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Kinetics and Catalysis

, Volume 59, Issue 1, pp 83–98 | Cite as

Catalytic Etching of Platinoid Gauzes during the Oxidation of Ammonia by Air. Reconstruction of Surface of Platinoid Gauzes at 1133 K in Air, in Ammonia, and in an NH3 + O2 Reaction Medium

  • A. N. Salanov
  • E. A. Suprun
  • A. N. Serkova
  • O. N. Sidel’nikova
  • E. F. Sutormina
  • L. A. Isupova
  • A. V. Kalinkin
  • V. N. Parmon
Article
  • 24 Downloads

Abstract

The structure, morphology, and chemical composition of the surface and near-surface layers of platinoid wires of polycrystalline gauzes, containing Pt (81 wt %), Pd (15 wt %), Rh (3.5 wt %), and Ru (0.5 wt %) after treatment at 1133 K in various media—in air, in ammonia, and after NH3 oxidation in air—are studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, and X-ray photoelectron spectroscopy (XPS). A thin film is found on the surface of the initial gauze containing an oxide layer of Rh2O3 with a thickness of ~2 nm, on the surface of which an inhomogeneous graphite-like layer 10–50 nm thick is located. It is shown that the heat treatment of gauzes in air leads to the partial removal of the surface graphite-like film that forms the reticulated structure on the wire surface. The treatment of gauzes in an ammonia atmosphere leads to the complete removal of the graphite-like and oxide layers and to the growth of metal grains of ~10 μm. After the catalytic reaction of NH3 oxidation, a deep structural rearrangement of the surface layer of the wire takes place, as a result of which crystalline metal agglomerates of ~10 μm are formed. It is supposed that the reaction of NH3 molecules with oxygen atoms penetrated on the defects leads to the local increase of temperature, due to which the metal atoms emerge on the surface and form large crystalline agglomerates and pores in the region of the grain boundaries.

Keywords

platinoid gauzes ammonia catalytic oxidation catalytic etching scanning electron microscopy 

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References

  1. 1.
    Satterfield, C.N., Heterogeneous Catalysis in Practice, New York: McGraw-Hill, 1980.Google Scholar
  2. 2.
    Lloyd, L., Handbook of Industrial Catalysis, New York: Springer, 2011.CrossRefGoogle Scholar
  3. 3.
    Parsons, C.L., J. Ind. Eng. Chem., 1919, vol. 11, p.541.CrossRefGoogle Scholar
  4. 4.
    Rideal, E.K. and Taylor, H.S., Catalysis in Theory and Practice, London: Macmillan, 1926.Google Scholar
  5. 5.
    Roginskii, S.Z., Tret’yakov, I.I., and Shekhter, A.B., Zh. Fiz. Khim., 1949, no. 10, p. 1152.Google Scholar
  6. 6.
    Roginskii, S.Z., Tret’yakov, I.I., and Shekhter, A.B., Dokl. Akad. Nauk SSSR, 1953, vol. 91, p.881.Google Scholar
  7. 7.
    Lyubovsky, M.R. and Barelko, V.V., J. Catal., 1994, vol. 149, p.23.CrossRefGoogle Scholar
  8. 8.
    McCabe, A.R., Smith, G.D.W., and Pratt, A.S., Platinum Met. Rev., 1986, vol. 30, p.54.Google Scholar
  9. 9.
    Nilsen, O., Kjekshus, A., and Fjellvag, H., Appl. Catal. A., 2001, vol. 207, p.43.CrossRefGoogle Scholar
  10. 10.
    McCabe, R.W., Pignet, T., and Schmidt, L.D., J. Catal., 1974, vol. 32, p.114.CrossRefGoogle Scholar
  11. 11.
    Kraehnert, R. and Baers, M., Appl. Catal. A., 2007, vol. 327, p.73.CrossRefGoogle Scholar
  12. 12.
    Kraehnert, R., Doctoral thesis, Berlin: Der Technischen Universitat, 2005.Google Scholar
  13. 13.
    Engel, T. and Ertl, G., Adv. Catal., 1979, vol. 28, p.1.Google Scholar
  14. 14.
    Bonzel, H.P. and Ku, R., Surf. Sci., 1973, vol. 40, p.85.CrossRefGoogle Scholar
  15. 15.
    Gland, J.L. and Korchak, V.N., Surf. Sci., 1978, vol. 75, p.733.CrossRefGoogle Scholar
  16. 16.
    Peuckert, M. and Bonzel, H.P., Surf. Sci., 1984, vol. 145, p.239.CrossRefGoogle Scholar
  17. 17.
    Chaston, J.C., Platinum Met. Rev., 1965, vol. 9, p.51.Google Scholar
  18. 18.
    Hannevold, L., Nilsen, O., Kjekshus, A., and Fjellvag, H., J. Alloy. Compd., 2005, vol. 402, p.53.CrossRefGoogle Scholar
  19. 19.
    Flytzani-Stephanopoulos, M., Wong, S., and Schmidt, L.D., J. Catal., 1977, vol. 49, p.51.CrossRefGoogle Scholar
  20. 20.
    Flytzani-Stephanopoulos, M. and Schmidt, L.D., Prog. Surf. Sci., 1979, vol. 9, p.83.CrossRefGoogle Scholar
  21. 21.
    Isupova, L.A., Kataliz Prom-sti, 2012, no. 6, p.52.Google Scholar
  22. 22.
    Goldstein, J., Newbury, D., Joy, D., Lyman, C., Echlin, P., Lifshin, E., Sawyer, L., and Michael, J., Scanning Electron Microscopy and X-ray Microanalysis, New York: Springer, 2003.CrossRefGoogle Scholar
  23. 23.
    Feldman, L.C. and Mayer, J.W., Fundamentals of surface and thin film analysis, New York: North-Holland, 1986.Google Scholar
  24. 24.
    Shen, S.Y., Zhao, T.S., and Xu, J.B., Int. J. Hydrogen Energy, 2010, vol. 35, p. 12911.CrossRefGoogle Scholar
  25. 25.
    Moulder, J.F., Stickle, W.F., Sobol, P.E., and Bomben, K.D., Handbook of X-ray Photoelectron Spectroscopy. Minnesota: Physical Electronic Inc., 1995.Google Scholar
  26. 26.
    Selman, G.L., Ellison, P.J., and Darling, A.S., Platinum Met. Rev., 1970, vol. 14, p.14.Google Scholar
  27. 27.
    Contour, J.P., Mouvier, G., Hoogewys, M., and Leclere, C., J. Catal., 1977, vol. 48, p.217.CrossRefGoogle Scholar
  28. 28.
    Salanov, A.N., Suprun, E.A., Serkova, A.N., Sidelnikova, O.N., Sutormina, E.F., Isupova, L.A., and Parmon, V.N. http://emc-proceedings.com/abstract/ scanning-electron-microscopy-study-of-platinum-catalyst-gauzes-treated-in-air-ammonia-and-nh3-in-air/.Google Scholar
  29. 29.
    Kazenas, E.K. and Chizhikov, D.M., Davlenie i sostav para nad okislami khimicheskikh elementov (Pressure and Steam Composition over the Oxides of Chemical Elements), Moscow: Nauka, 1976.Google Scholar
  30. 30.
    Parmon, V.N. and Bukhtiyarov, V.I., Kinet. Catal., 2005, vol. 46, no. 2, p.295.CrossRefGoogle Scholar
  31. 31.
    Salanov, A.N., Suprun, E.A., Serkova, A.N., Sidelnikova, O.N., Sutormina, E.F., Isupova, L.A., and Parmon, V.N., 12th Eur. Cong. on Catalysis EuropaCat-XII, Kazan, Russia, 2015, p.539.Google Scholar
  32. 32.
    Salanov, A.N., Suprun, E.A., Sutormina, E.F., Isupova, L.A., and Parmon, V.N. http://emc-proceedings. com/abstract/microscopy-study-of-the-frontand-back-sides-of-platinum-catalyst-gauzes-used-inammonia-oxidation.Google Scholar
  33. 33.
    Gottstein, G., Physical Foundations of Materials Science, Berlin: Springer, 2004.CrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • A. N. Salanov
    • 1
    • 2
  • E. A. Suprun
    • 1
  • A. N. Serkova
    • 1
  • O. N. Sidel’nikova
    • 3
  • E. F. Sutormina
    • 1
  • L. A. Isupova
    • 1
  • A. V. Kalinkin
    • 1
  • V. N. Parmon
    • 1
    • 2
  1. 1.Boreskov Institute of Catalysis, Siberian BranchRussia Academy of SciencesNovosibirskRussia
  2. 2.Novosibirsk State UniversityNovosibirskRussia
  3. 3.Institute of Solid State Chemistry and Mechanochemistry, Siberian BranchRussia Academy of SciencesNovosibirskRussia

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