Hydrogen production and storage in scalable solar cell

Solar power systems cannot consistently produce adequate energy due to intermittency but a solution to this problem is a device that can store energy in the form of hydrogen.

One of the most sustainable methods of producing hydrogen is photoelectrochemical (PEC) water-splitting, a process where solar energy is used to break water molecules into hydrogen and oxygen through a process called hydrogen evolution reaction.

This reaction requires a catalyst and in PEC water-splitting devices platinum is commonly used for the job: it is deposited on the surface of the solar panel’s photocathode, which is the solar panel’s electrode that converts light into electric current.

A research team at EPFL in Switzerland has now found a way to make efficient solar-powered water splitting devices using abundant and cheap materials.

According to EPFL, the group of Xile Hu developed a molybdenum-sulphide catalyst for the hydrogen evolution reaction, and the group of Michael Grätzel developed copper(I) oxide as a photocathode.