Temperature-programmed reduction (TPR) has been employed to study Ni-Mo mixed oxides which were previously used as model hydrodesulphurization (HDS) catalysts, using compositions ranging from pure MoO3 to pure NiO. An assignment of TPR signals to the different bulk phases was attempted. Good agreement between TPR spectra and structural data obtained previously from X-ray and electron diffraction was observed. TPR traces were consistent with proposed mechanisms of reduction of the bulk oxides MoO3, MoO2, NiO and NiMoO4. The variations in TPR spectra were interpreted in terms of effects such as crystallite size, ageing of the samples, hydrous state and chemical interactions between the different species. The significance of these reducibility results for HDS catalysis is discussed.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
C. H. Bartholomew andR. W. Fowler, in Proceedings of 3rd International Conference on the Chemistry and Uses of Molybdenum, edited by H. F. Barry and P. C. H. Mitchell (Climax Molybdenum Co., Ann Arbor, Michigan, 1979) p. 213.
C. Mazzocchia, F. Di Renzo, P. Centola andR. Del Rosso, in Proceedings of 4th International Conference on the Chemistry and Uses of Molybdenum, edited by H. F. Barry and P. C. H. Mitchell (Climax Molybdenum Co., Ann Arbor, Michigan, 1982) p. 406.
M. P. Astier, M. L. Lacroix andS. J. Teichner,J. Catal. 91 (1985) 356.
B. C. Gates, J. R. Katzer andG. C. A. Schuit, “Chemistry of Catalytic Processes” (McGraw-Hill, New York, 1979) pp. 390–447.
N. W. Hurst, S. J. Gentry, A. Jones andB. D. McNicol,Catal. Rev.-Sci. Eng. 24 (1982) 233.
D. C. Puxley, I. J. Kitchener, C. Komodromos andN. D. Parkins, in “Preparation of Catalysts III”, edited by G. Poncelet, P. Grange and P. A. Jacobs (Elsevier, Amsterdam, 1983) p. 237.
J. Brito andJ. Laine,Polyhedron 5 (1986) 179.
J. Laine andK. C. Pratt,React. Kinet. Catal. Lett. 10 (1979) 207.
K. C. Pratt, J. V. Sanders andN. Tamp,J. Catal. 66 (1980) 82.
J. V. Sanders andK. C. Pratt,ibid. 67 (1981) 331.
F. Corbet, R. Stefani, J. C. Merlin andC. Eyraud,C. R. Acad. Sci. 246 (1958) 1696.
J. Laine andK. C. Pratt,Ind. Eng. Chem. Fund. 20 (1981) 1.
L. M. Plyasova, I. Yu. Ivanchenko, M. M. Andrushkevich, R. A. Buyanov, I. Sh. Itenberg, G. A. Khramova, L. G. Karakchiev, G. N. Kustova, G. A. Stepanov, A. L. Tsailingol'd andF. S. Pilipenko,Kinet. Katal. (English translation)14 (1973) 882.
K. Bruckman, R. Grabowski, J. Haber, A. Mazurkiewicz, J. Sloczynski andT. Wiltowski,J. Catal. 104 (1987) 71.
R. Burch,J. Chem. Soc., Faraday Trans. I 74 (1978) 2982.
P. Arnoldy, J. C. M. De Jonge andJ. A. Moulijn,J. Phys. Chem. 89 (1985) 4517.
R. Thomas, V. H. J. De Beer andJ. A. Moulijn,Bull. Soc. Chim. Belg. 90 (1981) 1349.
A. Ueno, Y. Kotera, S. Okuda andC. O. Bennet, in Proceedings of 4th International Conference on the Chemistry and Uses of Molybdenum, edited by H. F. Barry and P. C. H. Mitchell (Climax Molybdenum Co., Ann Arbor, Michigan, 1982) p. 250.
J. Haber,J. Less-Common Metals 54 (1977) 243.
F. A. Cotton andG. Wilkinson, “Advanced Inorganic Chemistry”, 3rd Edn (Interscience, New York, 1972) p. 548.
M. A. Kipnis andD. Agievskii,Kinet. Katal. (English translation)22 (1981) 1252.
A. A. Slinkin, T. N. Kucherova, G. A. Ashavskaya andT. K. Lavrovskaya,ibid. (English translation)25 (1984) 1032.
A. I. Vagin, N. V. Burmistrova andV. I. Erofeev,React. Kinet. Catal. Lett. 28 (1985) 47.
J. M. Zabala, P. Grange andB. Delmon,C. R. Acad. Sci. Ser. C 279 (1974) 561.
A. F. Wells, “Structural Inorganic Chemistry”, 5th Edn (Oxford University Press, Oxford, 1984) p. 538.
P. Arnoldy, J. A. M. Van Den Heijkant, G. D. De Bock andJ. A. Moulijn,J. Catal. 92 (1985) 35.
About this article
Cite this article
Brito, J.L., Laine, J. & Pratt, K.C. Temperature-programmed reduction of Ni-Mo oxides. J Mater Sci 24, 425–431 (1989). https://doi.org/10.1007/BF01107422
- Crystallite Size
- Electron Diffraction