Photoelectrochemical overall water splitting with textured CuBi 2 O 4 as a photocathode.

Nanotextured CuBi2O4 photocathodes have been developed for applications toward solar water splitting. Tailoring the CuBi2O4 photocathodes to yield a high photocurrent and a positively large onset potential demonstrates their applicability in a photoelectrochemical tandem cell for entirely solar-driven overall water splitting.