The increasing demand for energy, partially dependent on the expected growthof the world population, and the need to reduce our global footprint to containthe consequences of climate change, leads to the urgent need to find sustain-able and environmental friendly solutions. Researchers around the world areworking to find the efficient and viable ways to use natural sustainable re-sources such as solar and wind power to produce energy. One of the mainissues with these kinds of sources is their storage ability. In order to solve thisproblem, the use of hydrogen has been proposed, given its qualities as a greenenergy carrier. In particular, recent works focused on the direct H2 production using a Photoelectrochemical cell which is able to convert solar photon flux into hydrogen thanks to water splitting reactions.