Fig. 7

In situ Raman spectra measured at various potentials on a, c a Cu Foil and b, d a Cu foil with Au@SiO₂. The measurement was conducted in a CO-saturated electrolyte to probe the surface species during CORR (0.01 M KOH and 0.045 M K₂SO₄, pH 11.7), e SEM image of Cu foil with Au@SiO₂ (inset image: TEM image of Au@SiO₂) reproduced with permission from [15]. Copyright (2020) American Chemical Society. In situ Raman spectra measured at various potentials on f Cu microparticle in CO-saturated 0.3 M NaH₂PO₄/0.35 M Na₂HPO₄ (pH 7.2). g Cu microparticle in CO-saturated 0.1 M NaOH/0.9 M NaClO₄ (pH 12.9), reproduced with permission from [47]. Copyright (2021) Springer Nature