ABSTRACT Design and fabrication of efficient Z‐scheme heterojunctions are critical for advancing solar fuel production, yet constructing directed interfacial charge transfer pathways remains challenging. Herein, we report ZnIn 2 S 4 /g‐C 3 N 4 Z‐scheme heterojunctions where interfacial defects serve as electron highways for rapid charge separation. These heterostructures exhibit a significant enhancement in CO 2 photoreduction efficiency compared to pristine components, while maintaining > 90% activity after three cycles. Experimental and theoretical analyses confirm that interfacial defects act as charge‐transfer mediators, synergistically accelerating surface redox kinetics to enable efficient solar fuel production (232.92 μmol g − 1 of CO and 10.7 mmol g − 1 of H 2 after 5 h of illumination). This work establishes interfacial defect utilization as an efficient strategy for high‐performance Z‐scheme systems in value‐added chemical synthesis.
Li et al. (Sun,) studied this question.