Abstract: An electrolyser for carbon dioxide reduction, having an electrolytic cell, with a cathode gas diffusion electrode and an anode gas diffusion electrode, in which a first side of the cathode gas diffusion electrode adjoins a cathode gas chamber in a planar manner and likewise a first side of the anode gas diffusion electrode adjoins an anode gas chamber, and an electrolyte chamber common to both gas diffusion electrodes is provided, which extends from the cathode gas diffusion electrode to the anode gas diffusion electrode and is at least partially delimited by the two gas diffusion electrodes with their second sides facing away from the respectively associated gas chambers.

Abstract: An electrode, which includes at least one tetragonally crystallized compound containing at least one element selected from the group of Cu and Ag, the crystal lattice of the compound being of the space group I41/amd type. An electrolysis cell includes the electrode.

Abstract: An electrode, which includes at least one tetragonally crystallized compound containing at least one element selected from the group of Cu and Ag, the crystal lattice of the compound being of the space group I41/amd type. An electrolysis cell includes the electrode.

Abstract: An electrode including Cu4O3, in particular an ethylene-selective electrode with a mixed valence Cu4O3 catalyst. A method for producing an electrode of this type, an electrolytic cell having an electrode of this type, and a method for electrochemically converting carbon dioxide using such an electrode including Cu4O3.