. 2020 Sep 30;5(40):25568–25581. doi: 10.1021/acsomega.0c02417

Table 3. Atomic Percentages of the Copper and Palladium Species Calculated from the XPS Spectra of the Catalysts.

sample	species	peak (eV)	atomic (%)
CuO_x/rGO_c	Cu₂O	932.4	43.2
CuO_x/rGO_c	CuO	934.2	56.8
CuO_x-PdO_y/rGO_c	Cu₂O	932.4	46.3
CuO_x-PdO_y/rGO_c	CuO	934.2	53.7
CuO_x-PdO_y/rGO_c	Pd⁰	335.4	14.1
	PdO_x < 1	336.1	32.2
	PdO	337.2	30.8
	PdO₂	338.2	22.9