Abstract
The reducibility of ZnO was investigated in the temperature range of 523–623 K in a stream of a reducing agent such as H2, CO, and methanol. ZnO was reduced only in the presence of copper in the vicinity of ZnO with CO and methanol, but it was not reduced with H2. Methanol was a stronger reducing agent in the reduction of ZnO than CO, while CO was stronger in the reduction of CuO than methanol. Two types of brass were observed resulting from the reduction of ZnO in the Cu/ZnO sample by XRD. Zanghengite brass started to be formed at 573 K in addition to α-brass which was observed at the temperature above 523 K in the temperature range of 523–623 K during the ZnO reduction with methanol. The carbon monoxide chemisorption showed that the copper surface areas decreased during the reduction of ZnO with methanol.
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References
M.V. Twigg, Catalyst Handbook (Wolfe, 1989).
J.C. Frost, Nature 334 (1988) 557.
K. Klier, Adv. Catal. 31 (1982) 243.
G.J.J. Bartley and R. Burch, Appl. Catal. 43 (1988) 141.
O.S. Joo, K.D. Jung, S.H. Han and S.J. Uhm, J. Catal. 157 (1995) 259.
O.S. Joo, K.D. Jung, S.H. Han, S.J. Uhm, D.K. Lee and S.K. Ihm, Appl. Catal. 135 (1996) 273.
I.A. Fischer and A.T. Bell, J. Catal. 178 (1998) 153.
M.S. Spencer, Catal. Lett. 50 (1998) 101.
G.J. Miller, C.H. Rochester, S. Bailey and K.C. Waugh, J. Chem. Soc. Faraday Trans. 88 (1992) 2085.
A. Kiennemann, H. Irdris, J. Hindermann, J. Lavalley, A. Vallet, P. Chaumette and P. Courty, Appl. Catal. 59 (1990) 165.
M.S. Spencer, Surf. Sci. 192 (1987) 336.
T. van Herwijnen and W.A. de Jong, J. Catal. 34 (1974) 209.
K.D. Jung, O.S. Joo, S.H. Han, S.J. Uhm and I.J. Chung, Catal. Lett. 35 (1995) 303.
S.S. Rao and T.R. Anantharaman, Curr. Sci. 32 (1963) 262.
H.P. Klug and L.E. Alexander, X-ray Diffusion Procedures (Wiley, New York, 1974) p. 594.
ASTM 21231.
P. Steiner, S. Hufner, N. Martensson and B. Johansson, Solid State Commun. 37 (1981) 73.
D.L. Roberts and G.L. Griffin, J. Catal. 110 (1988) 117.
J.W. Evans, M.S. Wainwright, A.J. Bridgewater and D.J. Young, Appl. Catal. 7 (1983) 75.
G.C. Bond, Catalysis by Metals (Academic Press, London, 1962).
J.C.T. Bart and R.P.D. Sneeden, Catal. Today 2 (1987) 1.
L.B. Prankrafts, Thermodynamic Properties of Elements and Oxides, Bureau Mines Bull. 672.
J.M. Smith and H.C. van Ness, Introduction to Chemical Engineering Thermodynamics, 3rd Ed. (McGraw-Hill, New York).
M.S. Spencer, Surf. Sci. 192 (1987) 323.
P.A. Jacobs, M. Tielen, J.P. Linart, J.B. Uytterhoeven and H. Beyer, J. Chem. Soc. Faraday Trans. I 72 (1976) 2793.
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Jung, KD., Joo, OS. & Han, SH. Structural change of Cu/ZnO by reduction of ZnO in Cu/ZnO with methanol. Catalysis Letters 68, 49–54 (2000). https://doi.org/10.1023/A:1019027302428
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DOI: https://doi.org/10.1023/A:1019027302428