Perovskite synthesis

This section will again focus on perovskites with references to the preparation of other mixed oxides. Note, however, that several methods described for perovskite synthesis may be applied to other solids. 

New method of dispersed perovskites synthesis based upon mechanochemical activation of the solid starting compounds is elaborated. The influence of defect structure of these compoimds as well as surface segregation on their catalytic properties is discussed. Basic stages of the monolith perovskite catalysts preparation are optimized. The experimental samples of monolith catalysts of various shapes are obtained, possessing high activity, thermal stability and resistance to catalytic poisons. 

The original technology of powdered perovskite synthesis based upon mechanochemical activation (MA) of solid starting compoimds has been elaborated. It is distinguished by the simplicity, high productivity and yields highly dispersed perovskites of luiiform phase composition. 

Entry Perovskite Synthesis Microwave source Reaction conditions (reaction time Remarks/perovskite morphology... 

Uma, S., Raju, A.R., and Gopalakrishnan, J. (1993) Bridging the Ruddlesden-Popper and the Dion-Jacobson series of layered perovskites synthesis of layered oxides, A2- La2Ti3- Nb Oio (A=K, Rb), exhibiting ion exchange. /, Mater. Chem., 3(7), 709-713. 

Clarke, S.J., Guinot, B.P., Michie, C.W., Calmont, M.J., and Rosseinsky, M.J. (2002) Oxynitride perovskites synthesis and structures of LaZr02N, NdTi02N, and LaTi02N and comparison with oxide perovskites. Chem. Mater., 14, 288-294. 

Villoria JA, Alvarrez-Galvan MC, Al-Zahrani SM. Oxidative reforming of diesel fuel over LaCoOs perovskite derived catalysts influence of perovskite synthesis method on catalyst properties and performance. Appl Catal B Environ. 2011 105 276-88. 

R.K.C. de Lima, M S. Batista, M. Wallau, EA. Sanches, Y.P. Mascarenhas, E.A. Urquieta-Gonzalez, 2009, High specific surface area LaFeCo perovskites - Synthesis by nanocasting and catalytic behavior in the reduction of NO with CO, Appl. Catal. B Environ., 90, 3-4, 441-450. 

This method has been realized for synthesis of perovskite solids. Precursor compoimds with anions as oxalates, acetates, cyanides, nitrates, hydroxides have been employed as precursors for the perovskite synthesis. Examples are LaCoOs from LaCo(CN)6.5H20 and LaNiOs and NdNiOs from tri hydroxide of lanthanide in both examples can be a substitution of cations (lanthanides or transition elements), LnFeO 3, (Ln = Er, Sm, Nd). Sometimes in this method, it is necessaiy to find a suitable precursor compound for the synthesis of the desired composition because it is limited by the stoichiometric ratio of cations in the preciu or and in the final oxide. [32, 33, 44]... 

Lufaso MW (2002) Perovskite synthesis and analysis using stmcture piedictirai diagnostic software. The Ohio State University, Columbus... 

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