chlorine radicals through photoinduced ligand-to-metal charge transfer (LMCT). Unlike nickel-based catalysts, which can be prone to instability, Fe(III)-Cl complexes are highly stable and can efficiently release chlorine radicals upon exposure to light. These radicals are highly effective in driving hydrogen atom transfer (HAT) processes, enabling efficient and selective functionalization of C-H bonds. By leveraging Fe(III)-Cl catalysts, electrophotocatalysis offers a sustainable and cost-effective approach to synthesizing a broad range of valuable compounds, including C(sp 3 )-H heteroarylation, C(sp 3 )-H borylation, alkene difunctionalization, and Si/Ge-H activation, unlocking new opportunities in synthetic chemistry (Scheme 1A).