Abstract: The invention relates to a hydrogen producing apparatus comprising an enclosed volume, the volume comprising: at least one gas inlet from the outside environment, at least one porous matrix material with hygroscopic or deliquescent properties and having ionic conductivity, an oxygen producing electrode, a hydrogen producing electrode, an optional separator positioned between the oxygen producing electrode and the hydrogen producing electrode, a connection for connecting the electrodes to a power source, and at least one outlet for collecting the produced hydrogen outside the hydrogen producing apparatus, wherein a porous matrix material is in contact with the oxygen producing electrode.