Artificial photosynthesis is a process where a molecule of water is splitted into molecular oxygen and hydrogen. With this process can be obtained solar fuels (hydrogen gas) from water and sunlight and it seems a promising alternative to the traditional fossil fuels.
The objective of this thesis is the synthesis and study of cobalt catalysts actives for proton reduction (PR) to hydrogen gas, as well as the preparation of electrodes and photoelectrodes active for PR and water oxidation (WO) with the lowest energy consumption.
During this thesis, three cobalt catalysts have been synthetized and its study allowed us to determine the limiting factor in PR mechanism. Also, electrodes with graphene functionalized with a molecular catalyst have been prepared. Finally, photoanodes and photocathodes active for WO and PR below the thermodynamic potential under sunlight have been prepared.