Antimony porphyrins as red-light powered photocatalysts for solar fuel production from halide solutions in the presence of air

Abstract

Halide ions (X⁻) as cheap and abundant electron donors are oxidized with simulated sunlight in a photocatalytic reaction based on robust antimony porphyrins acting as red-light harvesting multielectron transfer sensitizers. Besides halogen formation (X₂/X₃⁻) this solar energy storing process under certain conditions also accumulates hydrogen peroxide (H₂O₂) as a second energy-rich compound.