Table 2 Longitudinal and transverse 13C relaxation time constants T1 and T2 of \({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\) signal components during each experimental stage at 10 ∘C (14.1 T).

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

Stage

Species

Component

T1 [s]

T2 [s]

OCV

CO2

Full signal

13.18 ± 0.71

2.15 ± 0.25

 

\({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\)

Coalesced signal

11.73 ± 0.05

0.81 ± 0.01

  

B0 distortion

11.75 ± 0.40

0.69 ± 0.03

CA

CO2

Full signal

12.39 ± 0.76

1.08 ± 0.13

 

\({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\)

Free ions

11.52 ± 0.09

1.00 ± 0.01

  

xSIPs

10.69 ± 0.10

0.79 ± 0.02

  

B0 distortion

12.96 ± 0.15

1.05 ± 0.02

CP

CO2

Full signal

11.43 ± 1.41

0.78 ± 0.17

 

\({{{{{{{{{\rm{HCO}}}}}}}}}_{3}}^{-}\)

Free ions

13.91 ± 0.13

1.34 ± 0.01

  

xSIPs

10.95 ± 0.12

0.93 ± 0.02

  

B0 distortion

13.06 ± 0.35

1.19 ± 0.03

  1. The error represents the fitting error received for T1 and T2 determination. The term xSIP represents ion pairs with one (x = 1) or two (x = 2) solvent layers between anion and cation.
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