Recyclable dual Z-scheme perovskite/g-C₃N₄ heterojunction enables photoredox nickel-catalyzed C(sp²)-C(sp³) cross-electrophile coupling.

Abstract

Nickel-catalyzed cross-electrophile coupling provides an efficient and cost-effective strategy for constructing C(sp²)-C(sp³) bonds, a pivotal transformation for diversifying molecular architectures in pharmaceutical and agrochemical synthesis. However, conventional methodologies usually require stoichiometric metal reductants, which pose safety risks, reaction instability, and environmental concerns. To circumvent these limitations, merging nickel catalysis with photoredox catalysis has emerged as a promising alternative. Central to this approach is to develop highly efficient, easy-to-prepare and recyclable photocatalysts, which can drive the reaction under mild conditions. In this work, we present a recyclable LaFeO₃/LaCoO₃/g-C₃N₄ heterojunction. The stepped band structure and dual Z-scheme carrier migration paths significantly enhance photocatalytic performance by synergistically increasing redox potentials and extending the lifetime of photogenerated charge carriers through efficient interfacial charge transfer. Leveraging this heterojunction, we have developed a nickel/photoredox dual-catalyzed cross-electrophile coupling between aryl iodides and alkyl halides, affording the desired products with up to 98% yields.