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Urchin-like double-shelled Pd–PdO/ZnO hollow sphere as an efficient catalyst for the Suzuki-Miyaura reaction
Materials Today Chemistry ( IF 7.3 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.mtchem.2020.100353
F. Rezaei , R. Khalifeh , M.A. Amrollahi

Abstract In recent years, the modification of metal oxides with noble metals to decrease the loading amount of expense of noble metal catalyst and amend the stability of nanocatalyst in chemical reactions has attracted significant attention. Here in this study, the urchin-like double-shelled Pd–PdO/ZnO hollow sphere is successfully prepared by using a simple hydrothermal method and carbon sphere as a hard template. The structure of the catalyst was confirmed by using field-emission scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscope, and BET. The total amount of palladium particles on ZnO was determined by induced coupled plasma analysis. The prepared catalyst gave high catalytic activity for the Suzuki reaction of aryl halides to afford biphenyls under milder conditions. Furthermore, the stability and reusability of catalyst were investigated, and all of the data proved that urchin-like double-shelled Pd–PdO/ZnO hollow sphere could be recycled five times without marked loss of activity.

中文翻译:

海胆状双壳 Pd-PdO/ZnO 空心球作为 Suzuki-Miyaura 反应的有效催化剂

摘要 近年来,用贵金属修饰金属氧化物以降低贵金属催化剂的负载量和改善纳米催化剂在化学反应中的稳定性引起了广泛关注。在本研究中,采用简单的水热法和碳球作为硬模板,成功制备了类似海胆的双壳 Pd-PdO/ZnO 空心球。通过场发射扫描电子显微镜、透射电子显微镜、X射线粉末衍射、能量色散X射线光谱和BET确认了催化剂的结构。ZnO 上钯颗粒的总量通过诱导耦合等离子体分析确定。制备的催化剂对芳基卤化物的 Suzuki 反应具有较高的催化活性,在较温和的条件下得到联苯。
更新日期:2020-12-01
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