Fig. 2: Structural characterizations of W/WO2, W and WO2 counterparts. | Nature Communications

Fig. 2: Structural characterizations of W/WO2, W and WO2 counterparts.

From: Metallic W/WO2 solid-acid catalyst boosts hydrogen evolution reaction in alkaline electrolyte

Fig. 2

a W 4 f core-level XPS spectra. b W L3-edge XANES spectra. c O K-edge NEXAFS spectra. d R space profiles of W (light blue), WO2 (blue), and W/WO2 (red) extracted from the corresponding W L3-edge EXAFS spectra. e WT-EXAFS plots. f The calculated ELF images of W, WO2, and W/WO2. Green to red indicates the gradually increased electron localization.

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