Fig. 5: Electrochemical SHINERS spectra of NO₃⁻RR.

SHINERS spectra between 230–750 cm⁻¹ on Cu₅₀Co₅₀ (a), Cu (b), and Co (c). SHINERS spectra between 750–1700 cm⁻¹ on Cu₅₀Co₅₀ (d) in 100 mM KNO₃ + 10 mM KOH during cathodic polarization from 0.7 to −0.1 V.