Fig. 2: i-CO2 transport kinetics in pores. | Nature Communications

Fig. 2: i-CO2 transport kinetics in pores.

From: Interconnected nanoconfining pore networks enhance catalyst CO2 interaction in electrified reactive capture

Fig. 2: i-CO2 transport kinetics in pores.

a Cross-sectional SEM image of the cathode electrode consisting of the IsotropicNano catalyst coated on a hydrophilic carbon paper substrate. b HRTEM image and c HAADF-STEM-EDS mapping of the IsotropicNano catalyst. d Synchrotron-based Small-Angle X-ray Scattering (SAXS) profiles and e BET pore size distribution in the 0.4–2 nm range. f Faradaic efficiency (FE) to CO and percentage of nanopores as a function of cathode electrode at 200 and 300 mA/cm2 in a carbonate electrolyzer with BPM. Where error bars are shown, values are means, and error bars indicate s.d. (n = 3 replicates). g EC-MS signal of CO2 (m/z = 44) measured across a current density range of 50–300 mA/cm2. h Total capacitance (Cdl) normalized by the BET surface area. i Calculated τo in dilute K2CO3 electrolytes. Relaxation time constant (τo) is calculated from the peak frequency (fo) of imaginary part of complex capacitance (Cim) using the relation τo = (2πfo)–1. Source data for the results are provided as a Source Data file.

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