Several studies have demonstrated the possibility to develop chemical cells inspired by biological models to produce molecular hydrogen, for example: Selvaggi "et al." explored the possibility to use energy captured by the PSII, developing for that goal, an organic-inorganic hybrid system replacing the PSII protein complex by microspheres of TiO2 a photo-inducible compound. In order to get the hydrogen production, the TiO2 microspheres were covered with hydrogenases extracted from the marine thermophile "Pyrococcus furiosus", in that way the energy of the light was captured by the TiO2 microspheres and used to generate protons and electrons from water with the subsequent production of 29 µmol de H2 hour−1.