Different E-NRR cell architectures. On the left, aqueous systems: 1) single compartment batch cell; 2) two compartments static cell with a selective separator; 3) three compartments cell with GDE for the gas inlet in the cathodic compartment. On the right, cathodic compartments with organic electrolyte in combination with aqueous electrolyte for the anodic compartment: 4) two compartments system with selective membrane; 5) four compartments cell with two GDEs.
