Fig. 6: Mechanism investigation. | Nature Communications

Fig. 6: Mechanism investigation.

From: Atomically dispersed chromium coordinated with hydroxyl clusters enabling efficient hydrogen oxidation on ruthenium

Fig. 6

CO-stripping (a) and Hupd (b) measurements for Ru–Cr1(OH)x−0.6 (black), Ru–Cr1(OH)x−1.1 (red), Ru–Cr1(OH)x−2.2 (blue), and Ru NPs (green). c In situ Raman spectra of Ru–Cr1(OH)x−1.1 at different overpotentials. d LSV curves of Ru–Cr1(OH)x−1.1 for HOR in different pH conditions. e H/D isotope effect analysis (jKOH/jKOD vs. potential) for Ru–Cr1(OH)x−1.1 (red) and Pt/C (pink) in 0.1 M KOH/KOD electrolyte. f HOR polarization curves of Ru–Cr1(18OH)x and Ru–Cr1(16OH)x catalysts, inset is the corresponding current ratios of Cr1(16OH)x and Ru–Cr1(18OH)x. g Relative current-time chronoamperometry of Ru–Cr1(18OH)x catalysts at an overpotential of 50 mV. h Operando EIS of Ru–Cr1(OH)x−0.6 (black), Ru–Cr1(OH)x−1.1 (red), Ru–Cr1(OH)x−2.2 (blue), and Pt/C (pink).

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