Hybrid photocathode based on a Ni molecular catalyst and SbSe for solar H production

We report a H 2 evolving hybrid photocathode based on Sb 2 Se 3 and a precious metal free molecular catalyst. Through the use of a high surface area TiO 2 scaffold, we successfully increased the Ni molecular catalyst loading from 7.08 ± 0.43 to 45.76 ± 0.81 nmol cm −2 , achieving photocurrents of 1.3 mA cm −2 at 0 V vs. RHE, which is 81-fold higher than the device without the TiO 2 mesoporous layer. Here we demonstrate the feasibility of high efficiency Sb 2 Se 3 photocathodes for hydrogen evolution using precious metal free Ni cocatalysts.