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. 2019 Jun 20;9:8902. doi: 10.1038/s41598-019-45399-2

Figure 4.

Figure 4

XPS spectra of (a,b) Pd 3p and O 1 s, (c,d) Pd 3d recorded on PdO/Pd/Au/Ti/SiO2/Si electrodes after (black) EC deposition, (blue) thermal, (green) basic and (red) acid treatment. (b,d) Deconvolution of the signals on the spectra recorded after thermal treatment.