Electrolyser device and method for carbon dioxide reduction

The invention relates to an electrolyser for carbon dioxide reduction, comprising an electrolytic cell (4), with a cathode gas diffusion electrode (6) and an anode gas diffusion electrode (8), in which a first side (12) of the cathode gas diffusion electrode (8) adjoins a cathode gas chamber (10) in a planar manner and likewise a first side (13) of the anode gas diffusion electrode (8) adjoins an anode gas chamber (14), and an electrolyte chamber (16) common to both gas diffusion electrodes (6, 8) is provided, which extends from the cathode gas diffusion electrode (6) to the anode gas diffusion electrode (8) and is at least partially delimited by the two gas diffusion electrodes (6, 8) with their second sides (18, 19) facing away from the respectively associated gas chambers (10, 14).