“…The choice of photoanode materials and modulation strategies depends on the functional requirements of PECCP (for example, whether it is carbon steel (CS) or stainless steel (SS) that needs to be protected, and whether hole-trapping agents are to be added). Although various photoactive materials, including metal oxides, carbon-based materials, [43,64,65] and organic polymers, [66] are available for building PECCP systems, a single material can hardly meet all essential requirements due to its limitations in efficiency, stability, CB position, etc. Therefore, the rational design and construction of photoanode in PECCP have been an important research task.…”