Effect of Ni–W–S electrocatalysts on the stability and electrochemical properties of photocathodes

Schematic of NiWS/TiO 2 /Si photocathode, where W-doped Ni sulfide is photoelectrodeposited on TiO 2 -passivated Si to boost charge transfer, achieving −30.8 mA cm −2 at 0 V RHE and stable operation over 1000 h for efficient solar H 2 generation.