NOVELTY - An electrode is manufactured by forming a catalyst (4) layer by introducing cations of metals into channels (3) of channel-clustered structure of layer of ion-exchange membrane using ion-exchange method.    USE - For manufacture of electrode for electrochemical reactions and for electrochemical devices, e.g., electrolyzer (claimed). It is also used for water electrolysis. It is also used for ozone production through decomposition of water and fuel cells.    ADVANTAGE - The invention increases catalytic activity and reduces low catalysis efficiency and it produces high-performance electrolyzer. The obtained electrode has high ionic conductivity and high electrochemical activity.    DETAILED DESCRIPTION - Manufacture of electrode comprising a porous conducting substrate (1), a polymer ion-exchange membrane layer (2) applied on the substrate and having a channel-clustered structure; and metallic catalyst particles attached to the substrate in the locations where the particles conjugate with the channels of the channel-clustered structure of the polymer ion-exchange membrane layer involves forming polymer ion-exchange membrane layer with a channel-clustered structure on the porous conducting substrate; forming the catalyst layer by introducing cations of different metals into the channels of the channel-clustered structure of the layer of ion-exchange membrane using the ion-exchange method, after which electrochemical reduction of the cations is performed with the aim to form metallic particles on the porous surface of the substrate in the locations where the substrate conjugates with the channels of the channel-clustered structure of the ion-exchange membrane layer, with the process of forming the catalyst layer repeated several times to obtain a multilayer catalyst out of one metal or at least two different metals.    An INDEPENDENT CLAIM is also included for an electrolyzer comprising two electrodes, e.g., anode and cathode.    DESCRIPTION OF DRAWING(S) - The figure schematically shows the segment of an electrode with catalyst.    Substrate (1)    Polymer ion-exchange membrane layer (2)    Channels (3)    Catalyst (4)