PdO‐CuO Nanoparticles Supported on Fe₂O₃ Nanoplate as Highly Effective Heterogeneous Catalyst for Suzuki–Miyaura Coupling Reaction

The palladium‐catalyzed Suzuki–Miyaura coupling reaction (SMC) serves as a pivotal method for constructing carbon–carbon bonds in organic synthesis. In this study, a bimetallic Pd‐Cu/Fe₂O₃ nanoplate catalyst are rationally designed and synthesized through a sequential impregnation strategy. The phase composition, morphological features, and surface electronic states of the catalyst are systematically characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS), and H₂‐temperature‐programmed reduction (TPR). Remarkably, this heterogeneous nanocatalyst exhibits outstanding catalytic activity for SMC reactions under mild temperature of 40 °C, achieving 99% product yield within 15 min in the absence of toxic solvents or phase‐transfer agents. The superior catalytic performance is mainly attributed to the coexistence of Pd²⁺ and Pd^δ+ (2 < δ < 4) on the support surface and the synergistic effect between PdO and CuO nanoparticles. Furthermore, the catalyst demonstrates excellent recyclability, retaining 90% of its initial activity after five consecutive cycles. This study provides a viable strategy for developing energy‐efficient heterogeneous catalysts through bimetallic synergy.