Mechanistic insights into solar water oxidation by cobalt-phosphate-modified α-Fe2O3 photoanodes

Abstract

Electrochemical, spectroscopic, and microscopic measurements on mesostructured Co-Pi/α-Fe₂O₃ composite photoanodes reveal evolving pathways of water oxidation with increasing Co-Pi thickness, and highlight major fundamental differences between structured and planar Co-Pi/α-Fe₂O₃ composite photoanodes that help to reconcile previously conflicting mechanistic interpretations.