Lanthanum-Based Perovskite-Type Oxides La_1−xCe_xBO₃ (B = Mn and Co) as Catalysts: Synthesis and Characterization

Figure 1

FT-IR spectra of the La_1−xCe_xCoO₃ (a) and La_1−xCe_xMnO₃ (b) perovskites ( = 0, 0.2, and 0.4). The most important vibration band around 600 cm⁻¹ appears sharper for = 0.2 suggesting the perovskite with more symmetrical structure.

(a)

(b)