We synthesized a recyclable palladium ionic catalyst, Ti_0.97Pd_0.03O_1.97, using a solution combustion method (SCM), and characterized by XRD and Rietveld refinement. The synthesized Pd ionic catalyst is stable, insensitive to moisture and air, and easy to handle. The new catalyst has exhibited a phenomenal result for the Suzuki-Miyaura cross-coupling reaction with a broad substrate scope, and the reaction proceeds in an aqueous medium. The new catalyst proved beneficial and produced excellent yields irrespective of aryl halide used in the reaction (electron-rich or electron-poor or heterocyclic compounds) and shown a turnover frequency (TOF) of 14–25 h⁻¹ for different reactions. The catalyst was coated on a cordierite monolith (Mg₂Al₄Si₅O₁₈), which enhanced the applicability of the catalyst, and made the handling and recycling of the catalyst very easy. Suzuki Miyaura reaction was carried out using both Pd-powder catalysts as well as the Pd-coated honeycomb, which gave almost similar results. We have demonstrated the recyclability of Pd coated cordierite monolith and shown the superiority of the catalyst over the other Pd catalysts for the Suzuki-Miyaura reaction.

我们使用溶液燃烧法（SCM）合成了可回收的钯离子催化剂Ti _0.97 Pd _0.03 O _1.97，并通过XRD和Rietveld精炼进行了表征。合成的Pd离子催化剂稳定，对湿气和空气不敏感并且易于处理。新型催化剂对于具有宽底物范围的Suzuki-Miyaura交叉偶联反应显示出了惊人的结果，并且该反应在水性介质中进行。不管反应中使用的芳基卤化物（富电子或贫电子或杂环化合物）如何，新催化剂都被证明是有益的，并且产生了优异的收率，并且不同反应的周转频率（TOF）为14–25 h ^-1。将该催化剂涂覆在堇青石整体料（Mg₂ Al ₄ Si ₅ O ₁₈），提高了催化剂的适用性，并使催化剂的处理和回收非常容易。Suzuki Miyaura反应使用Pd粉体催化剂和Pd涂层蜂窝体进行，结果几乎相似。我们已经证明了Pd包覆堇青石整料的可回收性，并显示了Suzuki-Miyaura反应的催化剂优于其他Pd催化剂。