Abstract: The invention concerns a half-cell (H1) of an electrolytic cell (EZ) for an electrolyzer (EY). The half-cell (H1) has an anode part-plate (AP) with perpendicular elevations (NP). Arranged on an upper side of the perpendicular elevations (NP) of the anode part-plate (AP) is an anode-transporting layer (AT). The half-cell (H1) has a membrane (MB), which is arranged on a side of the anode-transporting layer (AT) that is facing away from the elevations (NP) and which is permeable to specified charge carriers. In this case, the anode-transporting layer (AT) has a graduated pore structure, in which a respective diameter of the pores in the anode-transporting layer (AT) decreases in a direction perpendicularly towards the membrane (MB).

Abstract: The invention relates to a method for producing a membrane electrode arrangement for an electrolysis cell for the electrochemical separation of water into hydrogen and oxygen, including the steps of: providing a substrate having a first surface and a second surface, which faces away from the first surface, coating at least one of the surfaces of the substrate with a catalyst material, immersing the coated substrate in an extraction agent to at least partially extract a solvent from the catalyst material, and drying the coated substrate at a temperature that is lower than 60° C.

Abstract: An electrolysis cell for polymer electrolyte membrane electrolysis with a cathodic half-cell and an anodic half-cell is provided. The cathodic half-cell and the anodic half-cell are separated from one another by a polymer electrolyte membrane. At least one of the half-cells has a channel structure which is formed by a gas diffusion layer and a bipolar plate. The bipolar plate has a main body made of a metal base material having a coating material. The coating material is present in a homogeneous mixed phase including titanium niobium (TiNb), titanium niobium nitride and also iridium and/or iridium carbide (IrC). A coating to be applied as a protective layer to a metal component of an electrolysis cell is also described. This coating comprises the constituents titanium niobium (TiNb) and titanium niobium nitride (TiNbN) and also admixtures of iridium carbide (IrC) and/or (Ir).

Abstract: The invention relates to an electrolytic cell for polymer electrolyte membrane electrolysis with a cathode half-cell and an anode half-cell, the cathode half-cell and the anode half-cell being separated from one another by means of a polymer electrolyte membrane. The cathode half-cell has a first catalyst material designed to catayse a reduction of molecular oxygen, and a second catalyst material designed to catalyae a reduction of hydrogen ions. The first catalyst material is introduced into a first catalyst layer and the second catalyst material is introduced into a second catalyst layer different from the first catalyst layer, the first catalyst layer being disposed directly adjacent to the second catalyst layer. The invention also relates to a method for producing an electrolytic cell for polymer electrolyte membrane electrolysis.

Abstract: An electrolytic cell for polymer electrolyte membrane electrolysis with a cathode half-cell and an anode half-cell is provided. The cathode half-cell and the anode half-cell being separated from one another by a polymer electrolyte membrane. The anodic half-cell has a gas diffusion layer. The gas diffusion layer is made from a fine-meshed metallic carrier material. An anodic catalyst layer with an anodic catalyst material is applied onto the polymer electrolyte membrane. The anodic catalyst layer is arranged adjacent to the gas diffusion layer, wherein a thin protective layer is applied in each case locally and selectively onto the fine-meshed carrier material in the area of the contact points between the gas diffusion layer and the adjoining anodic catalyst layer. The thin protective layer comprises iridium and/or iridium oxide so that the input of anodic catalyst material into the gas diffusion layer is inhibited.

Abstract: A method and a device for producing CO from CO2, wherein the reaction proceeds via a formate of the formula HNR1R2H+ HCO2? and/or an amide of the formula HCONR1R2, R1 and R2 being the same or different and being selected from hydrogen and substituted and unsubstituted alkyl groups having 1 to 20 C atoms.