Abstract
The effect of Zn in copper catalysts on the activities for both CO2 and CO hydrogenations has been examined using a physical mixture of Cu/SiO2+ZnO/SiO2 and a Zn-containing Cu/SiO2 catalyst or (Zn)Cu/SiO2. Reduction of the physical mixture with H2 at 573–723 K results in an increase in the yield of methanol produced by the CO2 hydrogenation, while no such a promotion was observed for the CO hydrogenation, indicating that the active site is different for the CO2 and CO hydrogenations. However, the methanol yield by CO hydrogenation is significantly increased by the oxidation treatment of the (Zn)Cu/SiO2 catalyst. Thus it is concluded that the Cu–Zn site is active for the CO2 hydrogenation as previously reported, while the Cu–O–Zn site is active for the CO hydrogenation.
Similar content being viewed by others
References
J. Skrzypek,J. Sloczynski andS. Ledakowicz, Methanol Synthesis (Polish Scientific Publisher, Warszawa, 1994).
J.C.J. Bart andR.P.A. Sneeden, Catal. Today 2 (1987) 1.
K. Klier, Adv. Catal. 31 (1982) 243.
G.C. Chinchen,P.J. Denny,J.R. Jennings,M.S. Spencer andK.C. Waugh, Appl. Catal. 36 (1988) 1.
M.S. Spencer, Catal. Lett. 50 (1998) 37.
M.S. Spencer, Catal. Lett. 60 (1999) 45.
J.S. Lee,K.H. Lee,S.Y. Lee andY.G. Kim, J. Catal. 144 (1993) 414.
G.C. Chinchen,P.J. Denny,D.G. Parker,M.S. Spencer andD.A. Whan, Appl. Catal. 30 (1987) 333.
M. Takagawa andM. Ohsugi, J. Catal. 107 (1987) 161.
K. Klier,V. Chatikavanij,R.G. Herman andG.W. Simmons, J. Catal. 74 (1982) 343.
M. Bowker,H. Houghton andK.C. Waugh, J. Chem. Soc. Faraday Trans. I 77 (1981) 3023.
N.Y. Topsøe andH. Topsøe, J. Mol. Catal. A 141 (1999) 95.
C.V. Ovesen,B.S. Clausen,J. Schiøtz,P. Stoltze,H. Topsøe andJ.K. Nørskov, J. Catal. 168 (1997) 133.
J. Yoshihara andC.T. Campbell, J. Catal. 161 (1996) 776.
R.A. Hadden,B. Sakakini,J. Tabatabaei andK.C. Waugh, Catal. Lett. 44 (1997) 145.
Y. Kanai,T. Watanabe,T. Fujitani,M. Saito,J. Nakamura andT. Uchijima, Catal. Lett. 27 (1994) 67.
Y. Kanai,T. Watanabe,T. Fujitani,T. Uchijima andJ. Nakamura, Catal. Lett. 38 (1996) 157.
J. Nakamura,I. Nakamura,T. Uchijima,Y. Kanai,T. Watanabe andT. Fujitani, J. Catal. 160 (1996) 65.
T. Fujitani,T. Matsuda,Y. Kushida,S. Ogihara,T. Uchijima andJ. Nakamura, Catal. Lett. 49 (1997) 175.
I. Nakamura,H. Nakano,T. Fujitani,T. Uchijima andJ. Nakamura, Surf. Sci. 402-404 (1998) 92.
T. Fujitani andJ. Nakamura, Catal. Lett. 56 (1998) 119.
T. Fujitani andJ. Nakamura, Appl. Catal. A 191 (2000) 111.
T. Fujitani andJ. Nakamura, Catal. Lett. 63 (1999) 245.
T. Fujitani,I. Nakamura,T. Uchijima andJ. Nakamura, Surf. Sci. 383 (1997) 285.
E.K. Poels andD.S. Brands, Appl. Catal. A 191 (2000) 83.
I. Nakamura,T. Fujitani,T. Uchijima andJ. Nakamura, J. Vac. Sci. Technol. A 14 (1996) 1464.
I. Nakamura,T. Fujitani,T. Uchijima andJ. Nakamura, Surf. Sci. 400 (1998) 387.
I. Chorkendorff,P.A. Taylor andP.B. Rasmussen, J. Vac. Sci. Technol. A 10 (1992) 2277.
R.G. Herman,K. Klier,G.W. Simmons,B.P. Finn,J.B. Bulko andT.P. Kobylinski, J. Catal. 56 (1979) 407.
S. Mehta,G.W. Simmons,K. Klier andR.G. Herman, J. Catal. 57 (1979) 339.
G.R. Sheffer andT.S. King, J. Catal. 115 (1989) 376.
G.R. Sheffer andT.S. King, J. Catal. 116 (1989) 488.
L.E.Y. Nonneman andV. Ponec, Catal. Lett. 7 (1990) 213.
W.R.A.M. Robinson andJ.C. Mol, Appl. Catal. 60 (1990) 73.
R. Burch,S.E. Golunski andM.S. Spencer, J. Chem. Soc. Faraday Trans. 86 (1990) 2683.
Y. Choi, K. Futagami, T. Fujitani and J. Nakamura, Appl. Catal. A, in press.
W.B. Pearson, A Handbook of Lattice Spacing of Metals and Alloys (Pergamon, Oxford, 1973) p. 601.
J. Nakamura,I. Nakamura,T. Uchijima,T. Watanabe andT. Fujitani, in: Proc. 11th Int. Congr. on Catalysis, Stud. Surf. Sci. Catal., Vol. 101 (Elsevier, Amsterdam, 1996) p. 1389.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Choi, Y., Futagami, K., Fujitani, T. et al. The difference in the active sites for CO2 and CO hydrogenations on Cu/ZnO-based methanol synthesis catalysts. Catalysis Letters 73, 27–31 (2001). https://doi.org/10.1023/A:1009074219286
Issue Date:
DOI: https://doi.org/10.1023/A:1009074219286