ELECTROCHEMICAL SYSTEM COMPRISING TWO HALF-CELLS AND METHOD FOR ELECTROCHEMICAL PRODUCTION OF GAS

An electrochemical system comprising a first half-cell (1, 100) adapted for holding a first electrolyte, a first electrocatalyst (10) arranged on a current collector (11) forming a first working electrode, and a first auxiliary electrode material (12) arranged on a second current collector (13), and a second half-cell (2, 200) adapted for holding a second electrolyte, a second electrocatalyst (20) arranged on a current collector (21) forming a second working electrode, and a second auxiliary electrode material (20) arranged on a current collector (21), wherein the working electrode and the auxiliary electrode are connected to an external circuit including a power supply (300) and a control unit (400), and wherein the polarity of the power supply determines whether the working electrode acts as a cathode or an anode, thus creating a cathodic or an anodic half-cell. A method for electrochemical production of chemicals and gases, in particular hydrogen, using said cell or system of cells.