Selective laser sintering (SLS) 3d printing was utilized to manufacture a solid catalyst for Suzuki‐Miyaura cross‐coupling reactions from polypropylene as a base material and palladium nanoparticles on silica (SilicaCat Pd⁰ R815‐100 by SiliCycle) as the catalytically active additive. The 3d printed catalyst showed similar activity to that of the pristine powdery commercial catalyst, but with improved practical recoverability and reduced leaching of palladium into solution. Recycling of the printed catalyst led to increase of the induction period of the reactions, attributed to the pseudo‐homogeneous catalysis. The reaction is initiated by oxidative addition of aryl iodide to palladium nanoparticles, resulting in formation of soluble molecular species, which then act as the homogeneous catalyst. SLS 3d printing improves handling, overall practicality and recyclability of the catalyst without altering the chemical behaviour of the active component.

中文翻译：

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铃木宫浦交叉偶联反应的3D打印钯催化剂

利用选择性激光烧结（SLS）3d打印技术，以聚丙烯为基础材料和钯纳米颗粒在二氧化硅上制造铃木-宫浦交叉偶联反应的固体催化剂（SilicaCat Pd ⁰R815-100（SiliCycle））作为催化活性添加剂。3d印刷催化剂显示出与原始粉状市售催化剂相似的活性，但具有改善的实际可回收性并减少了钯浸入溶液中。印刷催化剂的再循环导致反应的诱导期增加，这归因于假均相催化。该反应通过将芳基碘化物氧化加成到钯纳米颗粒上而引发，从而形成可溶性分子物质，然后将其用作均相催化剂。SLS 3d打印可改善催化剂的处理，整体实用性和可回收性，而不会改变活性成分的化学行为。