Fig. 3: Evidence for in-situ formation and reduction of NiIII-OOH under the optimal MOR conditions. | Nature Communications

Fig. 3: Evidence for in-situ formation and reduction of NiIII-OOH under the optimal MOR conditions.

From: Unraveling a bifunctional mechanism for methanol-to-formate electro-oxidation on nickel-based hydroxides

Fig. 3

Operando Raman spectra of a NiMn and b NiFe-LDHs both obtained at various potentials under optimal MOR (the subscript H or D denotes CH3OH/H2O or CD3OD/D2O solution) and OER conditions, respectively. The blue circles indicate the feature bands of NiIII-OOH. Multi-potential step curves of c NiMn and d NiFe-LDHs in 1 M KOH solutions without and with 3 M CH3OH. In all panels, the pink, yellowish, and pale green shaded areas indicate the application of a constant voltage of 1.62 VRHE, an open-circuit process and the application of an open circuit voltage of 1.02 VRHE, respectively.

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