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

Figure 4

H₂-TPR profiles of La_1−xCe_xCoO₃ (a) and La_1−xCe_xMnO₃ (b) perovskites ( = 0, 0.2, and 0.4). The reduction peaks shifted to the lower temperature, indicating that Ce⁴⁺ insertion increased the catalyst reducibility.

(a)

(b)