Abstract: The present invention relates to a monomeric polypeptide including a single subunit comprising the active site of a [NiFe]-hydrogenase-like protein, said monomeric polypeptide having hydrogenase activity.

Abstract: Photocatalytic device to dissociate an aqueous phase to product hydrogen gas, said device being set up in such a way that at least one photocatalytic system in contact with said aqueous phase can be irradiated by a light source to produce—through an oxidation reaction in said aqueous phase—oxygen gas, electrons and protons at a means of electron capture, said device comprising: a first zone comprising said aqueous phase, and a means for reducing said protons set up to carry out a reduction reaction on said protons by said electrons in order to generate hydrogen gas. said device being characterised in that said means for proton reduction is a proton exchange interface with a front side facing said means of electron capture, and a back side, with only said back side of said proton exchange interface bearing at least one catalyst and/or at least one catalytic system.

Abstract: This invention concerns a device for dissociating an aqueous phase to generate hydrogen gas, said device comprising: a first zone comprising said aqueous phase, a means of electron capture, a means for reducing protons, and an energy source, said device being characterized in that said means for proton reduction is a proton exchange interface with a front side facing said means of electron capture, and a back side, with only said back side of said proton exchange interface bearing at least one catalyst and/or at least one catalytic system.

Abstract: Photocatalytic device to dissociate an aqueous phase to product hydrogen gas, said device being set up in such a way that at least one photocatalytic system in contact with said aqueous phase can be irradiated by a light source to produce—through an oxidation reaction in said aqueous phase—oxygen gas, electrons and protons at a means of electron capture, said device comprising: a first zone comprising said aqueous phase, and a means for reducing said protons set up to carry out a reduction reaction on said protons by said electrons in order to generate hydrogen gas. said device being characterised in that said means for proton reduction is a proton exchange interface with a front side facing said means of electron capture, and a back side, with only said back side of said proton exchange interface bearing at least one catalyst and/or at least one catalytic system.

Abstract: This invention concerns a device for dissociating an aqueous phase to generate hydrogen gas, said device comprising: a first zone comprising said aqueous phase, a means of electron capture, a means for reducing protons, and an energy source, said device being characterised in that said means for proton reduction is a proton exchange interface with a front side facing said means of electron capture, and a back side, with only said back side of said proton exchange interface bearing at least one catalyst and/or at least one catalytic system.