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

Table 3

XPS peak positions and atomic percentages of and perovskites obtained from the fitting of La 3d, Co 3p, Mn 3p, Ce 3d, and O1s XPS spectra.

	LaCoO3	La0.8Ce0.2CoO3	La0.6Ce0.4CoO3	LaMnO3	La0.8Ce0.2MnO3
La 3d (eV)	834.3	834.7	834.3	834.7	834.4
	850.9	851.8	851.1	851.7	851.1
Co 3p/Mn 3p (eV)	779.9	780.2	779.9	641.8	641.8
	795.2	795.8	795.5	653.1	653.2
O 1s (eV)	528.5	528.8	528.7	528.8	528.9
	531.4	531.6	531.5	531.4	531.5
Ce^1 (at. %)	—	4.84 (3.9)	7.11 (3.6)	—	6.4 (10.1)
O (at. %)	75.1	73.6	73.4	77.4	74.9
La (at. %)	15.7	13.2	11.2	17.2	14.2

value in parenthesis is a peak percentage (%) of the Ce³⁺ ion.