Leonardo A. Delgado, Ivan Merino-Garcia, Sara Crespo, Kevin Fernández-Caso, Vítor J.P. Vilar, Francisca C. Moreira, Jonathan Albo
• First CaTiO 3 /WO 3 /BiVO 4 photoanode applied to glycerol-driven PEC H 2 production • The heterostructured surface improves charge separation and limits recombination • Waste glycerol replaces OER, significantly reducing energy input for H 2 generation • Coupled glycerol oxidation and H 2 evolution achieve high Faradaic efficiencies • Flow-cell PEC operation enables scalable waste-to-chemicals and fuel production