Efficient Visible‐Light‐Driven Hydrogen Generation on g‐C 3 N 4 Coupled with Iron Phosphide

Transition metal phosphides as promising noble metal free cocatalysts are gaining increasing interest for hydrogen generation and other energy conversion reactions. The present study reports a new Fe 2 P/g‐C 3 N 4 hybrid for efficient photocatalytic hydrogen generation by water splitting under visible light irradiation. The H 2 production rate obtained using this system is approximately 15 times higher than that obtained using pure g‐C 3 N 4 , and is comparable with that of Pt/g‐C 3 N 4 under the same conditions. According to detailed studies using UV/Vis diffuse reflectance and photoluminescence spectroscopies as well as photoelectrochemical measurements, the reason for the high efficiency of the Fe 2 P/g‐C 3 N 4 hybrid is due to a highly effective separation and low recombination rate of photogenerated electrons and holes rather than absorption under visible light. The present study reports a promising non‐toxic photocatalyst with low cost and high natural abundance for improving photocatalytic H 2 generation.