Abstract
Nitric oxide reduction by hydrogen has been studied on Pt-Ru/SiO2 catalysts of various Pt/Ru atomic compositions in the temperature range 298–673 K. Physical characterization showed the presence of bimetallic particles which tend to be Pt-rich. The overall activity of the bimetallic catalysts suggests a dilution of the active component (Pt) in the range 373–523 K. The addition of Ru results in a general improvement of the N2 selectivity and significant modifications in the product distribution are observed as a function of the catalyst composition. A bimetallic particle model is proposed in which various types of surfaces are exposed including those with pure Pt atoms and/or Pt-Ru mixture. This model allows to explain the overall activity and selectivity in the whole series of catalysts.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G.L. Bauerle and K. Nobe, Ind. Eng. Chem. Prod. Res. Dev. 13 (1974) 185;
M. Shelef and H.S. Gandhi, Ind. Chem. Prod. Res. Dev. 11 (1972) 2.
W.E. Bell and M. Tagami, J. Phys. Chem. 67 (1963) 2432.
R.L. Klimish and K.C. Taylor, Environ. Sci. Technol. 7 (1973) 127.
S. Kim and M.J. D'Aniello Jr., Appl. Catal. 56 (1989) 23.
B.R. Powell and Y. Chen, Appl. Catal. 53 (1989) 233.
S. Alerasool and R.D. Gonzalez, J. Catal. 124 (1990) 204;
H. Miura, K. Tagushi, K. Sugiyama, T. Matsuda and R.D. Gonzalez, J. Catal. 124 (1990) 194;
G. Díaz, F. Garin, G. Maire, S. Alerasool and R. Gonzalez, Appl. Catal. A 124 (1995) 33.
M.C. Sánchez Sierra, J. García Ruíz, M. Garzia Proietti and J. Blasco, J. Mol. Catal. A 96 (1995) 65.
R. Ku, N.A. Gjostein and H.P. Bonzel, Surf. Sci. 64 (1977) 465.
Thomas and W.H. Weinberg, Phys. Rev. Lett. 41 (1978) 1181.
H.P. Bonzel and T.E. Fischer, Surf. Sci. 51 (1975) 213.
P.D. Reed, C.M. Comrie and R.M. Lambert, Surf. Sci. 72 (1978) 423.
K.C. Taylor and R.L. Klimish, J. Catal. 30 (1973) 478.
T. Nishida, C. Egawa, S. Naito and K. Tamaru, J. Chem. Soc. Faraday Trans. I 80 (1984) 1567.
W.F. Banholzer, Y.O. Park, K.M. Park and R.I. Masel, Surf. Sci. 128 (1983) 176.
J. Siera, B.E. Nieuwenhuys, H. Hirano, T. Yamada and K.I. Tanaka, Catal. Lett. 3 (1989) 179.
H. Hirano, T. Yamada, K.I. Tanaka, J. Siera, P. Cobden and B.E. Nieuwenhuys, Surf. Sci. 262 (1992) 97.
T. Koylinski and B. Taylor, J. Catal. 33 (1974) 376;
W.C. Hecker and A.T. Bell, J. Catal. 92 (1985) 247.
H. Muraki and Y. Fujitani, Ind. Eng. Chem. Prod. Res. Dev. 25 (1986) 414.
M. Shelef and H.S. Gandhi, Ind. Eng. Chem. Prod. Res. Develop. 8 (1972) 393.
W. Hume-Rothery,Electrons, Atoms, Metals, and Alloys, 3rd Ed. (Dover, 1963).
M. José-Yacamán, S. Tehuacanero, C. Zorrilla and G. Diaz, Mater. Res. Soc. Symp. Proc. 398 (1995) 133.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Diaz, G., Gómez-Cortés, A. & Benaissa, M. NO + H2 reaction on Pt-Ru/SiO2 catalysts: correlation between nanostructure and catalytic activity and selectivity. Catal Lett 38, 63–72 (1996). https://doi.org/10.1007/BF00806901
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00806901