Lead halide perovskite (PVK) has been deemed as a promising photocatalyst alternative because of its remarkable photoelectrical properties; however, the severe charge recombination has limited its catalytic activity. Herein, we report a PVK-based Z-scheme heterojunction, α-Fe₂O₃/Amine-RGO/CsPbBr₃, for high-efficiency CO₂ reduction in the presence of H₂O. By delicately controlling the interfacial interaction, effective Z-scheme electron transfer from α-Fe₂O₃ to CsPbBr₃ is built, leading to boosted charge separation and prolonged carrier lifetime, as confirmed by electron spin resonance (ESR), transient absorption (TA) spectra, etc. The impactful spatial separation of photo-generated carriers in Z-scheme system finally enables an 8.3-fold enhancement in photocatalytic performance as compared to CsPbBr₃. A stable product yield of 469.16 μmol g⁻¹ and an electron consumption yield of 3,132.46 μmol g⁻¹ are achieved. This work is expected to provide deep insights into boosting the photocatalytic performance of PVK by modulating the charge carrier dynamics.

钙钛矿卤化物（PVK）因其卓越的光电性能而被认为是有前途的光催化剂替代品。然而，严重的电荷重组限制了其催化活性。在本文中，我们报道了一个基于PVK-Z-方案异质结，的α-Fe ₂ ö ₃ /胺RGO / CsPbBr ₃，对于高效率的CO ₂还原中H的存在₂ O.通过微妙地控制界面相互作用，有效从Z-方案的电子转移的α-Fe ₂ ö ₃至CsPbBr ₃可以通过电子自旋共振（ESR），瞬态吸收（TA）光谱等方法证实，可以增强电荷分离并延长载流子寿命。Z方案系统中光生载流子的有效空间分离最终实现了8.3与CsPbBr ₃相比，光催化性能提高了三倍。469.16微摩尔g的稳定的产品收率^-1和3,132.46电子消费产率微摩尔克^-1得以实现。预期这项工作将通过调节电荷载流子动力学为增强PVK的光催化性能提供深刻的见解。