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. 2021 Sep 1;6(36):23274–23280. doi: 10.1021/acsomega.1c02994

Table 2. Surface Atomic Composite of the Catalysts Determined by XPS.

		Mn_x/Mn_total (%)			O_x/O_total (%)			Fe_x/Fe_total (%)
samples		Mn³⁺	Mn⁴⁺		O_β	O_α		Fe²⁺	Fe³⁺
Fe₂O₃					47.8	52.2		43.3	56.7
MnO₂		56.2	43.8		44.3	55.7
3Mn1Fe		51.4	48.6		41.1	58.9		46.8	53.2
5Mn1Fe		46.6	53.4		37.2	62.8		57.1	42.9
7Mn1Fe		49.5	50.5		40.2	59.8		50.4	49.6