Fig. 6: Stability and mechanistic study of model catalysts. | Nature Communications

Fig. 6: Stability and mechanistic study of model catalysts.

From: Carbonate electrolytes manipulate lattice oxygen dynamics of oxyhydroxides toward efficient and durable water oxidation

Fig. 6: Stability and mechanistic study of model catalysts.

a Stability test of alkaline water electrolyzers with different anode catalysts in a 6 M KOH solution at 25 °C, the inset shows the photograph of an assembled zero-gap alkaline water electrolyzer; b potential loss for different anode catalysts after the stability test; c operando Raman spectra of model catalysts biased at 1.6 V (vs. RHE) in 0.1 M KOH electrolyte using H218O or H216O as the solvent; d plots of the Ni3+-O Raman peak position as a function of time during the lattice-oxygen incorporation and release steps; e schematic illustration of the dynamic equilibrium between the lattice-oxygen release and refilling steps caused by CO32- intercalation during OER catalysis via the LOM pathway.

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