Fig. 5. Signal deconvolution of the ¹³C ${{\mathrm{HCO}}_3}^{-}$ NMR signal at 9.4 T (100.6 MHz resonance frequency).

The ${{\mathrm{HCO}}_3}^{-}$ evolves from the open circuit voltage (OCV) stage a over the chronoamperometry (CA) stage b to the chronopotentiometry (CP) stage c in a similar fashion to Fig. 4, where the free ion are depicted in blue, ion pairs in red, and coalesced signal in purple. An additional signal component (green) represents the B₀ distortion in proximity to the working electrode. Due to the weaker B₀ field strength, the separation of the free ion and ion pair signal is not as pronounced.