Fig. 4: In-situ/Ex-situ structure and composition measurement. | Nature Communications

Fig. 4: In-situ/Ex-situ structure and composition measurement.

From: Decoupled electrolysis for hydrogen production and hydrazine oxidation via high-capacity and stable pre-protonated vanadium hexacyanoferrate

Fig. 4

a, b In-situ Raman line spectra and 2D contour plots of the p-VHCF electrode. c–g Ex-situ XPS spectra of the p-VHCF electrode at different charging and discharging states (symbols 1-5, respectively, represent the states of 0.52, 0.6, 0.9, 1.2, and 0.52 V). c V 2p spectra and d–e valence distribution ratio diagrams of V. f Fe 2p spectra and (g) valence distribution ratio diagram of Fe. h CV curve of the p-VHCF electrode during the redox reaction.

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