Application of a hydrogen reference electrode to a solid state water removal device

An electrolytic water removal device using a solid polymer electrolyte memb rane has been developed for controlling the humidity in the atmosphere of e lectrical control boxes. The device consists of a solid polymer electrolyte and thin film electrodes. The anode side of the device shows a dehumidifyi ng effect while the cathode side shows a humidifying effect. This paper rep orts the evaluation and separation of the anode and cathode potentials by i nstalling a gas port as a reversible hydrogen reference electrode attached to the water removal device. The polarization curves show that the anode po tential remained stable at 2 V vs RHE, while the cathode potential changed significantly.