Fig. 5: Operando Raman and UV–vis spectra characterizations. | Nature Communications

Fig. 5: Operando Raman and UV–vis spectra characterizations.

From: Operando monitoring of the functional role of tetrahedral cobalt centers for the oxygen evolution reaction

Fig. 5

a 2D contour plots of operando Raman spectra of CoFe-NBs in 1.0 M KOH for the OER. b Representative normalized differential operando UV–vis spectra of CoFe-NBs in 1.0 M KOH for the OER. The differential absorption spectra were obtained from the difference between the spectra at different potentials and in the electrolyte without any applied potentials. c Absorbances of CoFe-NBs at 500 and 540 nm upon CV scan. d Calculated surface accumulated charges of Co-NBs and CoFe-NBs against the OER applied potentials.

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