Photobio-electrocatalytic production of H using fluorine-doped tin oxide (FTO) electrodes covered with a NiO-InS p-n junction and NiFeSe hydrogenase.

Clean energy vectors are needed towards a fossil fuel-free society, diminishing both greenhouse effect and pollution. Electrochemical water splitting is a clean route to obtain green hydrogen, the cleanest fuel; although efficient electrocatalysts are required to avoid high overpotentials in this process. The combination of inorganic semiconductors with biocatalysts for photoelectrochemical H production is an alternative approach to overcome this challenge.