Photoelectrochemical overall water splitting with textured CuBi2O4 as a photocathodeElectronic supplementary information (ESI) available. See DOI: 10.1039/c7cc09041b

Nanotextured CuBi 2 O 4 photocathodes have been developed for applications toward solar water splitting. Tailoring the CuBi 2 O 4 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. Tailoring CuBi 2 O 4 photocathodes demonstrates their applicability in a photoelectrochemical tandem cell for entirely solar-driven overall water splitting.