Fig. 4: Signal deconvolution of the 13C \({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\) NMR signal at 14.1 T (150.9 MHz resonance frequency). | Communications Chemistry

Fig. 4: Signal deconvolution of the 13C \({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\) NMR signal at 14.1 T (150.9 MHz resonance frequency).

From: In operando NMR investigations of the aqueous electrolyte chemistry during electrolytic CO2 reduction

Fig. 4

The \({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\) evolves from the open circuit voltage (OCV) stage a over the chronoamperometry (CA) stage b to the chronopotentiometry (CP) stage c. Two signal components are assigned to \({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\) existing as free ions (blue) and in an ion pair (red). For high exchange rate between these two states, i.e., during OCV, the two signal components coalesce into a single peak (violet). An additional signal component (green) represents the B0 distortion in proximity to the working electrode.

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