Self-cycled photo-Fenton-like system based on an artificial leaf with a solar-to-HO conversion efficiency of 1.46.

Millions of families around the world remain vulnerable to water scarcity and have no access to drinking water. Advanced oxidation processes (AOPs) are an effective way towards water purification with qualified reactive oxygen species (ROSs) while are impeded by the high-cost and tedious process in either input of consumable reagent, production of ROSs, and the pre-treatment of supporting electrolyte. Herein, we couple solar light-assisted HO production from water and photo-Fenton-like reactions into a self-cyclable system by using an artificial leaf, achieving an unassisted HO production rate of 0.