Fig. 5: Short-term stability of the PGM-free BPMEA cell.
From: Local ionic transport enables selective PGM-free bipolar membrane electrode assembly
a Faradaic efficiency (FE) of gas products and cell potential and b CO2-to-CO utilisation efficiency and inlet pressure of the BPMEA cell as a function of time for the BPMEA cell. Comparison of the c pH and d anion concentration of the anolyte before and after the stability test. The BPMEA cell was operated at a constant current density of 100 mA cm−2, using 1 L 0.1 M KOH as the anolyte, Ni foam as the anode and NiNC-IMI catalyst with 15% Sustainion ionomer as the cathode CL. The flow rate was 20 sccm for the CO2 gas inlet and 30 mL min−1 for the anolyte. The error bar in d represents the stand deviation across more than three tests.
