Catalytic oxidation properties and characterization of $LaSrCo_{0.9}(B'_{0.1}O_4(B'= Mn, Fe, Ni, Cu)$ mixed oxides
Catalytic oxidation properties and characterization of $LaSrCo_{0.9}(B'_{0.1}O_4(B'= Mn, Fe, Ni, Cu)$ mixed oxides
Using a polyacrylamide gel method, a series of $LaSrCo_{0.9}(B'_{0.1}O_4(B'= Mn, Fe, Ni, Cu)$ mixed oxides were prepared and their catalytic activity was studied with CO and $C_3H_8$ oxidations as a testing reaction. The results show that the specific effects of B' ions on CO and $C_3H_8$ oxidations depend on their category. In comparison to $LaSrCoO_4$ catalyst, the activity of $LaSrCo_{0.9}Ni_{0.1}O_4$ catalyst for CO and $C_3H_8$ oxidations is higher, while only lower activity is obtained for Mn, Fe or Cu-doped catalysts. The information derived from TPD, XRD and iodometry experiments shows that the increase in oxidation activity of $LaSrCo_{0.9}Ni_{0.1}O_4$ catalyst towards CO and $C_3H_8$ oxidation can be related to the increases in $O_2$-adsorption quantity, $CO_2$-desorption quantity, oxygen vacancies and lattice distortion due to the adulteration of nickel. Further investigation shows that the apparent activation energy of $LaSrCo_{0.9}Ni_{0.1}O_4$ towards CO oxidation is lower than that of $LaSrCoO_4$.
___
- 1.N. Guilhaume, S.D. Peter and M. Primet, Appl. Çatal. B. 10, 325-344 (1996).
- 2.S.D. Peter, E. Garbowski, N. Guilhaume, V. Perrichon and M. Primet, Catal. Lett. 54, 79-84 (1998).
- 3.Y. Liu, X.G. Yang, Y.M. Liu and Y. Wu, Acta Phys.-chim. Sin. 15, 506-511 (1999).
- 4.L.Z. Gao, Q.S. Li, Y. Wu and Z.L. Yu, Acta Chim. Sin. 54, 234-241 (1996).
- 5.Z. Zhao, X.G. Yang and Y. Wu, Acta Phys.-chim. Sin. 13, 344-350 (1997).
- 6.A.K. Ladavos and P.J. Pomonis, Appl. Catal. A, 165, 73-85 (1997).
- 7.H. Lou, H.Y. Zhen, J.Y. Yang, Z.Q. Yao, X. Yu, S.B. Du and F.T. Ma, Chem. J. Chinese U. 16, 107-110(1995).
- 8.Y. Wu, Z. Zhao, Y. Liu and X.G. Yang, J. Mol. Catal. A Chem. 155, 89-100 (2000).
- 9.Z. Zhao, X. G. Yang, Y. Liu and Y. Wu, J. Rare Earth 16, 325-331 (1998).
- 10.X.M. Yang, L.T. Luo and H. Zhong, React. Kinet. Catal. Lett. 81, 219-227 (2004).
- 11.T.X. Cheng, X.G. Yang and Y. Wu, Sci. China Ser. B, 38, 1025-1037 (1995).
- 12.D.C. Harris, T.A. Hewton, J. Solid State Chem. 69, 182-191 (1987).
- 13.H. Lou, J.G. Liu, X.J. Liu and F.T. Ma, J. Rare Earth 19, 324-328 (2001).
- 14.D. Ganguli, J. Solid State Chem. 30, 353-356 (1979).
- 15.H. Lou, Y.Z. Xu, P. Cheng, Y.P. Ge, G.L. Lu and F.T. Ma, Chinese J. Inorg. Chem. 15, 158-164 (1999).
- 16.Y. Tokura, H. Takagi and S. Uchida, Nature 337, 345 (1989).
- 17.X.M. Yang, L.T. Luo and H. Zhong, Appl. Catal. A, 272, 299-303 (2004).
- 18.L.Z. Gao, B.L. Dong, Q.S. Li, X. Lu, Z.L. Yu and Y. Wu, J. Fuel Chem. Tech. 22, 113-118 (1994).
- 19.X.Z. Qi, Z, Ma and S.W. Wang, Chem. Industry Engi. 17, 358-361 (2000).
- 20.Z. Zhao, X.G. Yang and Y. Wu, Appl. Catal. B Environmental 8, 281-297 (1996).