Lanthanum manganite perovskite

Baythoun, M. S. G Sale, F. R. 1982. Production of strontium-substituted lanthanum manganite perovskite powder by the amorphous citrate process. /. Mat. Sci. 17 2757-2769. 

Yang, C.K., Yamazaki, Y., Aydin, A., and Haile, S.M. (2014) Thermodynamic and kinetic assessments of strontium-doped lanthanum manganite perovskites for two-step thermochemical water splitting. 

Baythoun M.S.G., Sale F.R. Production of strontium-substituted lanthanum manganite perovskite powder by the amorphous citrate process. J. Mater. Sci. 1982 17 2757-2769 Bernard M.I.B., Soledade L.E., Santos I.A., Leite E.R., Longo E., Varela J.A. Influence of the concentration of 86203 and the viscosity of the precursor solution on the electrical and optical properties of Sn02 thin films produced by the Pechini method. Thin Solid Films 2002 405 228-233... 

M. Mori, Y. Hiei, N. Sammes, G. Tompsett, Thermal-expansion behaviors and mechanisms for Ca-or Sr-doped lanthanum manganite perovskites under oxidizing atmospheres. J. Electrochem. Soc. 147, 1295 (2000)... 

The MS signals of NO (m/e=30) and O2 (m/e=32) as functions of desorption temperature were recorded during NO-TPD imder He flow for perovskites (Table 6). A broad NO desorption centered at 200 °C with one minor shoulder at 90 °C and another one at 388 °C was observed in the TPD of NO profdes for LaCoOs. Upon Cu substitution the low temperature peak is entirely suppressed, the 200 °C one is substantially increased and shifted to higher temperature so that it interferes with the minor high temperature one. Similar NO desorption features were found for lanthanum manganites and ferrites after NO adsorption, representing three superimposed desorption peaks. In Section 4, TPD of NO + O2 studies over... 

The favoured material is modified lanthanum manganite (e.g. La0 8Sr0 2Mn03+x) which has the perovskite structure. It is a p-type semiconductor the electron transport occurring by electron-hopping (see Section 2.6.2) between the +3 and +4 states of the Mn ion. The strontium-doping enhances the conductivity. 

Electrodes The anodes of SOFC consist of Ni cermet, a composite of metallic Ni and YSZ, Ni provides the high electrical conductivity and catalytic activity, zirconia provides the mechanical, thermal, and chemical stability. In addition, it confers to the anode the same expansion coefficient of the electrolyte and renders compatible anode and electrolyte. The electrical conductivity of such anodes is predominantly electronic. Figure 14 shows the three-phase boundary at the interface porous anode YSZ and the reactions which take place. The cathode of the SOFC consists of mixed conductive oxides with perovskite crystalline structure. Sr doped lanthanum manganite is mostly used, it is a good /7-type conductor and can contain noble metals. 

Jiang SP (2008) Development of lanthanum strontium manganite perovskite cathode matraials of solid oxide fuel cells a review. J Mater Sci 43 6799-6833... 

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