Abstract
The influence of the nature of the metal precursor — platinum acetylacetonates and chloroplatinic acid — on the surface properties and catalytic activity of Pt/Al2O3 catalysts is reported. The obtained results indicate that the catalysts prepared by the organometallic route present higher metal dispersion and lower acidity compared with those prepared from H2PtCl6. On the other hand, XPS results showed that the state of platinum is essentially Pt0 in the catalysts obtained from Pt(acac)2 while in the solids prepared by impregnation of H2PtCl6 there exists an important contribution of Ptδ+ species which plays a positive role in the hydrogenation of toluene. An additional hydrogen spillover due to the presence of more acidic support is also suggested as an explanation of the observed catalytic results.
Similar content being viewed by others
References
Yu.I. Yermakov, Catal. Rev. Sci. Eng. 13 (1976) 77.
O.A. Ferretti, L.C.B. de Pauli, J.P. Candy, G. Mabillon and J.P. Bournonville,Preparation of Catalysts IV, eds. B. Delmon, P. Grange, P.A. Jacobs and G. Poncelet (Eisevier, Amsterdam, 1987) p.713.
Yu.I. Yermakov and B.N. Kuznetsov, React Kinet. Catal. Lett. 1 (1974) 67.
Yu.A. Ryndin, B.N. Kuznetsov, E.M. Monroz, V.A. Tripolski and Yu.I. Yermakov, Kinet. Katal. 18 (1977) 1536.
C.D. Wagner, W.M. Riggs, L.E. Davis, J.F. Moulder and G.E. Mullenberg, eds.,Handbook of X-Ray Photoelectron Spectroscopy (Perkin-Elmer, Eden Prairie, 1978).
J.E. Benson and M. Boudart, J. Catal. 4 (1965) 704.
G.R. Wilson and W.K. Hall, J. Catal. 8 (1967) 348.
E. Rosenberg, Thése d'Etat, Université de Paris, France (1984).
T. Huizinga, J. van Grondelle and R. Prins, Appl. Catal. 10 (1984) 199.
B.D. McNicol and R.T. Short, J. Electroanal. Chem. 81 (1977) 249.
H.C. Yao, M. Sieg and H.K. Plummer Jr., J. Catal. 59 (1979) 365.
S.D. Lin and M.A. Vannice, J. Catal. 143 (1993) 554.
J.M. Orozco and G. Webb, Appl. Catal. 6 (1983) 67.
P. Rabette, A.M. Deane, A.J. Tench and M. Che, Chem. Phys. Lett. 60 (1979) 348.
R. Gómez, G. del Angel, C. Damian and G. Corro, React. Kinet. Catal. Lett. 11 (1979) 137.
G. Lietz and J. Volter, J. Catal. 45 (1976) 121.
P. Gallezot, J. Datka, J. Massardier, M. Primet and B. Imilik,Proc. 6th Int. Congr. on Catalysis, eds. G.C. Bond, P.B. Wells and F.C. Tompkins (The Chemical Society, London, 1977) p. 696.
P. Reyes, I. Concha, M.E. Konig and J.L.G. Fierro, Appl. Catal. 103 (1993) 5.
S.D. Lin and M.A. Vannice, J. Catal. 143 (1993) 539.
W.J. Conner Jr., G.M. Pajonk and S.J. Teichner, Adv. Catal. 34 (1986) 1.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Reyes, P., Oportus, M., Pecchi, G. et al. Influence of the nature of the platinum precursor on the surface properties and catalytic activity of alumina-supported catalysts. Catal Lett 37, 193–197 (1996). https://doi.org/10.1007/BF00807753
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00807753