A study on improving the current density performances of CO2 electrolysers

Abstract Electrochemical CO 2 reduction reaction (CO RR) technology can reduce emission with converting excess electrical energy to high-value-added chemicals, which however needs further improvement on the electrolyser cell performance. In this work, extensive factors were explored in continuous electrolysers. Gold, one of benchmark materials for RR produce CO, was used as catalyst. Electrolyser configurations and membrane types have significant influences Compact MEA-constructed gas-phase showed better catalytic performance lower consumption. The gas diffusion electrode a 7:1 mass ratio total-catalyst-to-polytetrafluoroethylene (PTFE) ionomer exhibited best At low total voltage 2.2 V, partial current density production achieved 196.8 mA cm −2 , 90.6% efficiency 60.4% producing respectively. Higher selectivity be using anion exchange membranes, while higher hydrogen formate products cation membranes. This research has pointed out way how improve flow cells, leaving aside characteristics catalyst itself.