Fig. 2: Electronic Characterization and Analysis.
From: Diversity of platinum-sites at platinum/fullerene interface accelerates alkaline hydrogen evolution
a High-resolution Pt 4 f XPS spectra of PtC60 and Pt NCs. b, c All-in-vacuum XPS and UPS spectra of Pt/C60 film within the same vacuum chamber. d Binding energy of Pt 4f7/2 and work function depending on the amount of Pt deposited on C60 film corresponding to (b and c). e Normalized XANES spectra at Pt L3-edge of PtC60, Pt NCs, Pt foil, and PtO2. f EXAFS spectra of PtC60, Pt NCs, Pt foil and PtO2. g Average oxidation states, and d-band hole counts fitted via XANES spectra in (e). h, i Wavelet transform for the k3-weighted EXAFS spectra for PtC60 and Pt NCs, respectively.
