A CO 2 electrolyser with high flux for stable production of high-concentration formate (opens in new tab)

Direct electroreduction of CO2 to produce high-concentration formate is challenged by the low flux of liquids in typical catholyte-free membrane electrode assemblies (MEAs). Now, a high-flux MEA using core–shell Cu/Bi nanowires grown on three-dimensional Cu foam as the cathode enables CO2 electroreduction to high-concentration formate with high selectivity and stability.