Abstract
The oxygen nonstoichiometry of nickel-and iron-substituted lanthanum cobaltites of the compositions LaCo1−x Ni x O3−δ (x = 0.1, 0.3) and LaCo0.9Fe0.1O3−δ was studied by high-temperature thermogravimetric analysis over the temperature and oxygen partial pressure ranges 1223–1473 K and 10−3–0.21 atm. The partial replacement of cobalt with nickel (an acceptor impurity) in lanthanum cobaltite was found to increase the number of defects in the oxygen sublattice, whereas the replacement with iron (a donor impurity) decreased this number. Correlations between the experimental \(\log p_{O_2 } = f(\delta )\) dependences and the suggested models of formation of point defects were analyzed taking into account the formation of Schottky defects. Interrelation between the defect structure, partial molar thermodynamic characteristics of oxygen release from the crystal lattices of the oxides studied, and the nature of substituting impurities (Ni and Fe) in lanthanum cobaltite was demonstrated.
Similar content being viewed by others
References
M. Dokiya, Solid State Ionics 152, 383 (2002).
R. Chiba, F. Yoshimura, and Y. Sakurai, Solid State Ionics 124, 281 (1999).
A. N. Petrov, N. I. Lipatov, and D. I. Zybin, Izv. Akad. Nauk SSSR, Ser. Neorg. Mater. 24(2), 294 (1988).
H. J. M. Bouwmeester, Catal. Today 82, 141 (2003).
A. Atkinson and T. Ramos, J. Power Sources 130, 129 (2004).
P. Ganguly, Indian J. Chem., Sect. A: Inorg., Bio-inorg., Phys., Theor. Anal. Chem. 15, 280 (1976).
H. M. Zhang, Y. Shimizu, Y. Teraoka, et al., J. Catal. 121, 432 (1990).
L. A. Isupova, V. A. Sadykov, V. P. Ivanov, et al., React. Kinet. Catal. 53(1), 223 (1994).
A. N. Petrov, V. A. Cherepanov, and A. Yu. Zuev, Zh. Fiz. Khim. 61(3), 630 (1987).
M. Seppanen, M. Kyto, and P. Taskinen, Scand. J. Met. 9(1), 3 (1980).
J. Mizusaki, Y. Mima, and S. Yamauchi, J. Solid State Chem. 80, 102 (1989).
C. H. Chen, H. Kruidhof, H. J. M. Bouwmeester, and A. J. Burggraaf, J. Appl. Electrochem. 27, 71 (1997).
J. Mizusaki, M. Yoshihiro, S. Yamauchi, and K. Fueki, J. Solid State Chem. 58, 257 (1985).
J. Mizusaki, T. Sasamoto, W. R. Cannon, and H. K. Bowen, J. Am. Ceram. Soc. 65(8), 363 (1982).
J. M. D. Tascon, J. I. J. Fierro, and I. J. Tejuca, J. Chem. Soc., Faraday Trans. 81(10), 2399 (1985).
A. N. Petrov, V. A. Cherepanov, O. F. Kononchuk, and L. Ya. Gavrilova, J. Solid State Chem. 87, 69 (1990).
M. H. R. Lankhorst, H. J. M. Bouwmeester, and H. Verweij, Solid State Ionics 96, 21 (1997).
L. Ya. Gavrilova and V. A. Cherepanov, in Solid Oxide Fuel Cells VI, Ed. by S. C. Singhal and M. Dokiya, Vol. PV 99-17 of Electrochemical Society Proceedings Series (Electrochemical Society, Pennington, NJ, 1999), pp. 404–414.
T. V. Aksenova, A. N. Petrov, V. A. Cherepanov, and L. Ya. Gavrilova, Zh. Fiz. Khim. 80(8), 1 (2006) [Russ. J. Phys. Chem. 80 (8), 1215 (2006)].
P. M. Raccah and J. B. Goodenough, Phys. Rev. 155, 932 (1967).
L. A. Reznitskii, Zh. Fiz. Khim. 76(3), 572 (2002) [Russ. J. Phys. Chem. 76 (3), 493 (2002)].
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © E.A. Kiselev, N.V. Proskurnina, V.A. Cherepanov, 2007, published in Zhurnal Fizicheskoi Khimii, 2007, Vol. 81, No. 12, pp. 2174–2180.
Rights and permissions
About this article
Cite this article
Kiselev, E.A., Proskurnina, N.V. & Cherepanov, V.A. The oxygen nonstoichiometry, defect structure, and thermodynamic characteristics of disordering of nickel-and iron-substituted lanthanum cobaltites. Russ. J. Phys. Chem. 81, 1950–1955 (2007). https://doi.org/10.1134/S0036024407120084
Received:
Issue Date:
DOI: https://doi.org/10.1134/S0036024407120084