Novel Ferroelectric Mediated Dual S‐scheme Heterojunction with Multiple Built‐in Electric Fields for Enhanced Photoelectrochemical Seawater Splitting

/STO/CN is attributed to the effective charge separation driven by the multiple built-in electric fields within the ferroelectric mediated dual S-scheme heterojunction. The photogenerated carrier transfer pathways are discussed with multifarious methods such as band structure analysis, KPFM, EPR, and DFT calculations. It provides a perspective for constructing high-performance photocatalysts.