Fig. 1: Morphology and fine-structure characterizations of the Pt1/CoHPO catalyst. | Nature Communications

Fig. 1: Morphology and fine-structure characterizations of the Pt1/CoHPO catalyst.

From: Anti-dissolution Pt single site with Pt(OH)(O3)/Co(P) coordination for efficient alkaline water splitting electrolyzer

Fig. 1: Morphology and fine-structure characterizations of the Pt1/CoHPO catalyst.

a TEM image. Sale bar, 0.5 μm. b Representative magnified HAADF-STEM image, showing that only Pt single atoms are present in the CoHPO support (marked by red dotted circles). Inset, the FFT image. Sale bar, 2 nm. c Atomic line-scanning intensity profiles along the X-Y marked by 1 and 2 in b. d Elemental mapping. e k3-weighted Fourier-transformed (FT) of EXAFS spectra at R space. f Fitting curve of EXAFS spectra at R space. Inset, showing the optimized atomic model of Pt1/CoHPO, Pt (dark cyan), Co (blue), O (red), P (pink) and H (white). g XANES spectra at the Pt L3-edge. Inset, the fitted average valence state of Pt from XANES spectra.

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