A unique photoelectrochemical fuel cell consisting of dual photoelectrodes is developed by utilizing light, ascorbic acid, and oxygen to produce electric power. Specifically, the integration of bifunctional single‐atom iron cocatalysts significantly facilitates anodic ascorbic acid oxidation reaction and cathodic oxygen reduction reaction, effectively improving interfacial reaction kinetics and photoelectric conversion efficiency. Abstract Semiconductor‐based photoelectrochemical (PEC) fuel cells offer a feasible solution for sustainable and ...
