Hybrid photocathode based on a Ni molecular catalyst and Sb 2 Se 3 for solar H 2 production.

We report a H evolving hybrid photocathode based on SbSe and a precious metal free molecular catalyst. Through the use of a high surface area TiO scaffold, we successfully increased the Ni molecular catalyst loading from 7.08 ± 0.43 to 45.76 ± 0.81 nmol cm, achieving photocurrents of 1.3 mA cm at 0 V RHE, which is 81-fold higher than the device without the TiO mesoporous layer.