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Effect of the graphene cover layer on electrolyte and oxidation properties of a 16 nm Pt layer on FAD55. (a) O K-edge spectra (PEY) recorded at open circuit potential (0.05 V). (b,c) Pt 4f spectra acquired during stepwise anodization of the same samples as shown in panel a, with an excitation energy of 580 eV and 0.1 M H2SO4 electrolyte. Each potential was held at least 5 min prior to acquisition. Potentials are shown versus RHE.
