Abstract: An organic hydride production device comprises: an electrolyzer having an anode electrode that oxidizes water to generate a proton, a cathode electrode that hydrogenates a substance to be hydrogenated with the proton to generate an organic hydride, and a membrane that moves the proton together with dragged water from the side of the anode electrode to the side of the cathode electrode; an anolyte supplier that supplies the anolyte to the anode electrode; a water separator that separates the dragged water from the catholyte fed from the cathode electrode; and a water returner that sends the dragged water separated by the water separator to the anolyte supplier.

Abstract: An organic hydride producing system includes: an electrolytic bath having a cathode chamber; a catholyte supply device capable of supplying any catholyte selected from a plurality of the catholytes having different concentrations of substances to be hydrogenated to the cathode chamber; and a control device that controls the catholyte supply device so as to supply a catholyte to the cathode chamber, the catholyte having a specific concentration of a substance to be hydrogenated determined according to a magnitude of a current flowing in the electrolytic bath.

Abstract: An organic hydride generation system includes an electrolytic bath, a main power supplier, an auxiliary power supplier, a detector to detect a voltage of the electrolytic bath, a potential of an anode electrode, or a potential of a cathode electrode, and a controller to control the supply of power to the electrolytic bath. When it is detected that the voltage or the potential has changed to a specified value during operation stop of the organic hydride generation system in which the power from the main power supplier is not supplied to the electrolytic bath, the controller controls the auxiliary power supplier so as to supply the power to the electrolytic bath.