Abstract
A study of the effect of the aging atmosphere on the activity of co-precipitated copper zinc oxide catalysts for the ambient temperature oxidation of carbon monoxide is described and discussed. Four aging atmospheres are reported: air, N2, H2 and CO2, and both the precipitation and the aging of the precipitate were carried out by flowing these gases through the precipitation cell at constant pH and temperature. For all atmospheres, the surface area of the final CuO-ZnO catalyst increases with aging time and, consequently, the specific activity (mol CO converted/g catalyst/h) also increases. However, the intrinsic activity (mol CO converted/m2/h) initially decreases with aging time before attaining a steady level. The highest activity catalysts were obtained using air as the aging atmosphere and TPR studies indicate that this catalyst is less readily reduced. Catalysts prepared using CO2 as the aging atmosphere have lower activity, although the surface areas of these catalysts are not markedly lower. The study demonstrates that selection of the appropriate aging atmosphere, as well as the aging time, is an important parameter for the preparation of co-precipitated catalysts.
Similar content being viewed by others
References
M. S. Spencer, Catal. Lett. 66 (2000) 255.
M. V. Twigg, Catalyst Handbook (Wolfe, London, 1989).
D. Waller, D. Stirling, F. S. Stone and M. S. Spencer, J. Chem. Soc., Faraday Discuss. 87 (1989) 107.
J. C. J. Bart and R. P. A. Sneeden, Catal. Today 2 (1987) 1.
G. C. Chinchen, P. J. Denny, J. R. Jennings, M. S. Spencer and K. C. Waugh, Appl. Catal. 36 (1988) 1.
J. W. Couves, J. M. Thomas, D. Waller, R. H. Jones, A. J. Dent, G. E. Derbyshire and G. N. Greaves, Nature 354 (1991) 465.
G. C. Chinchen and M. S. Spencer, Catal. Today 10 (1991) 293.
R. A. Hadden, P. J. Lambert and C. Ranson, Appl. Catal. A122 (1995) L1.
M. Harratie, N. Yamada, T. Kobayashi and S. Ijima, J. Catal. 115 (1989) 301.
J. J. Spivey, in: Catalysis, Vol. 8, eds. G. C. Bond and G. Webb (Royal Society of Chemistry, London, 1989) p. 157.
L. Y. Margolis, Catal. Rev. Sci. Eng. 8 (1973) 241.
G. J. Hutchings, A. A. Mirzaei, R. W. Joyner, M. R. H. Siddiqui and S. H. Taylor, Catal. Lett. 42 (1996) 21.
G. J. Hutchings, A. A. Mirzaei, R. W. Joyner, M. R. H. Siddiqui and S. H. Taylor, Appl. Catal. A166 (1998) 143.
M. Haruta, Catal. Today 36 (1997) 153.
G. C. Bond and D. T. Thompson, Catal. Rev. Sci. Eng. 41 (1999) 319.
G. J. Hutchings, M. R. H. Siddiqui, A. Burrows, C. J. Kiely and R. Whyman, J. Chem. Soc., Faraday Trans. 93 (1997) 187.
S. H. Taylor, G. J. Hutchings and A. A. Mirzaei, Chem. Commun. (1999) 1373.
D. M. Whittle, A. A. Mirzaei, J. S. J. Hargreaves, R. W. Joyner, C. J. Kiely, S. H. Taylor and G. J. Hutchings, Phys. Chem. Chem. Phys.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mirzaei, A.A., Shaterian, H.R., Taylor, S.H. et al. Co-precipitated Copper Zinc Oxide Catalysts for Ambient Temperature Carbon Monoxide Oxidation: Effect of Precipitate Aging Atmosphere on Catalyst Activity. Catalysis Letters 87, 103–108 (2003). https://doi.org/10.1023/A:1023416819195
Issue Date:
DOI: https://doi.org/10.1023/A:1023416819195