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Applications of Magnetic Nanomaterials in Heterogeneous Catalysis
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2019-08-14 , DOI: 10.1021/acsanm.9b00976 Qiaoqiao Zhang 1 , Xiaoyuan Yang 1 , Jingqi Guan 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2019-08-14 , DOI: 10.1021/acsanm.9b00976 Qiaoqiao Zhang 1 , Xiaoyuan Yang 1 , Jingqi Guan 1
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Magnetic nanomaterials show promising applications in heterogeneous catalysis because of their ease of separation and good reusability. The magnetization saturation values of magnetic nanoparticles mainly depend on finite-size and surface effects. For small magnetic nanoparticles, the formation of domain walls provides a high energy state and the particles aggregate easily in clusters or clumps. To avoid agglomeration, magnetic nanoparticles can be coated with different shells (e.g., silica, carbon, metal, metal oxide, and polymer) to isolate them from external environments. Because of high surface area of magnetic nanoparticles, many active species can be supported on the surface to enhance the catalytic activity. This review focuses on recent developments of various magnetic nanomaterials in heterogeneous catalysis, including hydrogenation reaction, Suzuki–Miyaura reaction, oxidation reaction, chiral catalysis, enzyme catalysis, photocatalysis, electrocatalysis, and photoelectrochemical catalysis. Different synthesis strategies for magnetic nanomaterials are summarized. The active sites, stability, and catalytic mechanisms are discussed. Challenges and perspectives for magnetic nanomaterials in commercial applications are documented.
中文翻译：
磁性纳米材料在非均相催化中的应用
磁性纳米材料因其易于分离和良好的可重复使用性而在多相催化中显示出有希望的应用。磁性纳米粒子的磁化饱和度值主要取决于有限尺寸和表面效应。对于小的磁性纳米粒子，畴壁的形成提供了高能态，并且粒子易于聚集成簇或团块。为了避免附聚，可以用不同的壳（例如二氧化硅，碳，金属，金属氧化物和聚合物）涂覆磁性纳米颗粒，以使其与外部环境隔离。由于磁性纳米颗粒的高表面积，许多活性物质可以负载在表面上以增强催化活性。这篇综述着重于非均相催化中各种磁性纳米材料的最新发展，包括氢化反应，Suzuki-Miyaura反应，氧化反应，手性催化，酶催化，光催化，电催化和光电化学催化。总结了磁性纳米材料的不同合成策略。讨论了活性位点，稳定性和催化机理。记录了磁性纳米材料在商业应用中的挑战和前景。
更新日期：2019-08-14
中文翻译：
磁性纳米材料在非均相催化中的应用
磁性纳米材料因其易于分离和良好的可重复使用性而在多相催化中显示出有希望的应用。磁性纳米粒子的磁化饱和度值主要取决于有限尺寸和表面效应。对于小的磁性纳米粒子，畴壁的形成提供了高能态，并且粒子易于聚集成簇或团块。为了避免附聚，可以用不同的壳（例如二氧化硅，碳，金属，金属氧化物和聚合物）涂覆磁性纳米颗粒，以使其与外部环境隔离。由于磁性纳米颗粒的高表面积，许多活性物质可以负载在表面上以增强催化活性。这篇综述着重于非均相催化中各种磁性纳米材料的最新发展，包括氢化反应，Suzuki-Miyaura反应，氧化反应，手性催化，酶催化，光催化，电催化和光电化学催化。总结了磁性纳米材料的不同合成策略。讨论了活性位点，稳定性和催化机理。记录了磁性纳米材料在商业应用中的挑战和前景。
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