10.1021/acssuschemeng.8b00291.s001 Linfeng Bai Linfeng Bai Wanquan Jiang Wanquan Jiang Mei Liu Mei Liu Sheng Wang Sheng Wang Min Sang Min Sang Shouhu Xuan Shouhu Xuan Xinglong Gong Xinglong Gong General and Facile Method to Fabricate Yolk-like Structural Magnetic Nanocatalysts American Chemical Society 2018 RF CTAB mesoporous SiO 2 mSiO 2 MP NP Fabricate Yolk-like Structural metal nanoparticles 2018-05-20 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/General_and_Facile_Method_to_Fabricate_Yolk-like_Structural_Magnetic_Nanocatalysts/6394337 A general and facile method for synthesis of yolk-like nanocomposite composed of superparamagnetic core and mesoporous SiO<sub>2</sub> (mSiO<sub>2</sub>) shell with functional nanoparticles (Pd, Au, Pt) uniformly dispersing on their inner wall is reported. First, the magnetic particle (MP) was modified with resorcinol/formaldehyde resin (RF) layer. Then, the obtained MP@RF core–shell particle was decorated with functional metal nanoparticles such as Pd, Au, or Pt (defined as MP@RF-Pd, MP@RF-Au and MP@RF-Pt, respectively). To protect the metal nanoparticles, another hybrid CTAB/SiO<sub>2</sub> (hSiO<sub>2</sub>) shell was constructed on the above particle through the surfactant-templated sol–gel process. After calcination, the yolk-like nanocomposites such as MP@Void-Pd@mSiO<sub>2</sub>, MP@Void-Au@mSiO<sub>2</sub>, and MP@Void-Pt@mSiO<sub>2</sub> were successfully obtained. Because of the unique yolk-like structure, the as-prepared nanomaterials can be served as ideal nanoreactors for heterogeneous catalysis. The Heck reaction and the reduction of <i>p</i>-nitrophenol (4-NP) were introduced as model reactions to evaluate the catalytic activities of the magnetic nanocatalysts. Benefitted from the high dispersity of noble metals, large specific surface area and the mSiO<sub>2</sub> protective shell, all samples exhibited remarkable catalytic activity and reusability. After 7 cycles, the activities of MP@Void-Pd@mSiO<sub>2</sub> and MP@Void-Au@mSiO<sub>2</sub> could maintain as high as 98% and 81%, respectively.