Fig. 2: Structural characterizations of the catalysts. | Nature Communications

Fig. 2: Structural characterizations of the catalysts.

From: Electronic metal–support interaction modulates single-atom platinum catalysis for hydrogen evolution reaction

Fig. 2

a Pt 4f XPS spectra of the Pt-SAs/TMDs samples and commercial Pt/C. b Normalized XANES spectra at the Pt L3-edge of Pt foil, PtO2, Pt-SAs/MoS2, and Pt-SAs/MoSe2. The fitted average oxidation states (c) and d-band hole counts (d) of Pt from XANES spectra. e First-shell fitting of EXAFS spectra of Pt foil, PtO2, Pt-SAs/MoS2, and Pt-SAs/MoSe2. f Top, side, and perspective views (up to bottom, respectively) of the geometric configurations of Pt-SAs/TMDs with the Pt atom on the Mo/W top site. The color code is the same as in Fig. 1a.

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