Visible-light induced water-splitting on a chip

A direct way to produce hydrogen and oxygen from water is by photocatalysis. Following a two step z-scheme process, it is possible to use the visible part of the light spectra. In this process two types of catalytic particles needs sunlight to become active and one will take care for the oxygen production and the other for the hydrogen production. Between the catalytic particles there is an exchange of electrons and H+. Results in the literature show a low efficiency for this method. By introducing a structured metallic divider the goal is to separate the hydrogen and oxygen catalysts, and take care for a low conduction path for the electrons. This should contribute to an increased efficiency of the photocatalytic process. The metallic plate also divides the system in two compartments, which results in a separated oxygen and hydrogen production.

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PhD student: Michel Zoontjes, Supervisors: prof. dr. Wilfred van der Wiel (NE/EWI), prof dr. Guido Mul (PCS/TNW), dr. Mark Huijben (SRO MESA+)