This project aims to develop a hydrogen production system using sunlight in an integrated manner with earth abundant materials mimicking natural photosynthesis. PhotoElectroChemical (PEC) systems use semi-conductor materials to absorb photons from the sun to generate a potential high enough (>1.2 V) to split water and produce hydrogen and oxygen at an integrated electrolysis cell. A major advantage of PEC systems over systems composed of photovoltaic panels (PV) in conjunction to a separate electrolyzer is their integral approach, i.e. the PV cell is part of the electrolyzer. This provides opportunities not only for cost reduction but also for improvement in the efficiency of the electrochemical reaction.