Synthesis and structural characterization of LaMnO_3+δ and La_0.8AE_0.2MnO_3+δ (AE = Ca, Sr, Ba) perovskites for catalytic oxidation of volatile organic compounds

Abstract

Perovskite oxides have the general formula ABO3, where A is typically an alkaline earth (AE) or a lanthanide and B is a transition-metal. This family of compounds is probably the most studied one in the last decades since understanding the structure-properties correlation is of fundamental and technological interest [1]. Despite the simplicity of the crystalline structure, the size variation of A and B cations creates an immense structural variety and generates deviations respect the ideal structure through changes in the crystal symmetry, that leads to the appearance of interesting properties. These properties are the origin of multiple applications, mostly related to energy conversion, adsorption and catalysis, among others.