Chemical and Visible‐Light‐Driven Water Oxidation by Iron Complexes at pH 7–9: Evidence for Dual‐Active Intermediates in Iron‐Catalyzed Water Oxidation

Ironing out a solution: Chemical and visible-light-driven water oxidation by iron complexes and iron salts at pH 7–9 has been investigated. The iron complexes and salts act as precatalysts (see scheme) to produce α-Fe2O3 nanoparticles that are the real catalyst for the water oxidation with a turnover number over 1000.