Simultaneous Formate and Syngas Conversion Boosts Growth and Product Formation by .

Electrocatalytic CO reduction to CO and formate can be coupled to gas fermentation with anaerobic microorganisms. In combination with a competing hydrogen evolution reaction in the cathode in aqueous medium, the in situ, electrocatalytic produced syngas components can be converted by an acetogenic bacterium, such as , into acetate, ethanol, and 2,3-butanediol. In order to study the simultaneous conversion of CO, CO, and formate together with H with , fed-batch processes were conducted with continuous gassing using a fully controlled stirred tank bioreactor.