CuO has attracted significant attention as a potential photocatalyst for CO reduction. However, its practical use is limited by rapid charge recombination, insufficient catalytic sites, and poor stability. In this study, we report a facile synthesis of CuO@BiOCl core-shell hybrids with a well-defined shape of CuO and a two-dimensional nanosheet structure of BiOCl. The strategic selection of BiOCl nanosheet promotes charge separation efficiency via the formation of interfacial p-n junction and provides the active site for the CO reduction leading to enhanced photocatalytic CO-to-CH conversion efficiency. In addition, the core-shell hybrids also showed improved stability against photocorrosion of CuO. These findings highlight the potential of CuO@BiOCl core-shell hybrids as robust and efficient photocatalysts for sustainable fuel production.
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