Fig. 3: The bicarbonate electrolyzer with a cation exchange membrane and key performance metrics. | npj Materials Sustainability

Fig. 3: The bicarbonate electrolyzer with a cation exchange membrane and key performance metrics.

From: Electrolytic pathway for upgrading waste CO2 into syngas with a carbon capture and utilization energy efficiency greater than 50%

Fig. 3: The bicarbonate electrolyzer with a cation exchange membrane and key performance metrics.

a Exploded view of the bicarbonate electrolyzer reported in this work. The anolyte and catholyte are mixed after each circulation to reset ion concentrations. b Full cell voltages (Ecell) of bicarbonate electrolyzers that use a cation exchange membrane (CEM) or bipolar membrane (BPM) at various current densities and, c Faradaic efficiency of CO (FECO) of a bicarbonate electrolyzer with a CEM at various current densities. Bicarbonate electrolysis was conducted at two different temperatures: room temperature and 50 °C for both BPM-based and CEM-based electrolyzers. The FECO values for BPM are in the Supporting Information (Figure S4). Both electrolyzers yielded equivalent FECO values (within experimental error).

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