Kim Soohee, Kang Shin Wook, Kim Aram, Yusuf Mohammad, Park Ji Chan, Park Kang Hyun
Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University Busan 46241 Republic of Korea
Clean Fuel Laboratory, Korea Institute of Energy Research Daejeon 34129 Korea
RSC Adv. 2018 Feb 7;8(12):6200-6205. doi: 10.1039/c7ra13490h. eCollection 2018 Feb 6.
Mesoporous SiO-supported CuO nanoparticles as an egg-shell type catalyst were prepared by impregnation method. The obtained CuO/SiO egg-shell nanocatalyst had a large surface area and narrow pore size distribution. In addition, most of the CuO nanoparticles, with sizes around 2.0 nm, were highly dispersed in the mesoporous silica. Accordingly, fast reactant diffusion to the active sites would occur, especially when the active metal sites are selectively located on the outer part of the support, , the outer region of the egg shell. In solvent-free Sonogashira reactions for the synthesis of ynones from acyl chlorides and terminal alkynes, this catalyst exhibited a very high catalytic activity. The excellent catalytic performance can be attributed to the synergistic advantages of mesoporous structure and monodispersed CuO nanoparticles.
采用浸渍法制备了介孔SiO负载的CuO纳米颗粒作为蛋壳型催化剂。所制备的CuO/SiO蛋壳型纳米催化剂具有较大的比表面积和较窄的孔径分布。此外，大多数尺寸约为2.0 nm的CuO纳米颗粒高度分散在介孔二氧化硅中。因此，反应物能够快速扩散到活性位点，尤其是当活性金属位点选择性地位于载体的外部，即蛋壳区域的外部时。在由酰氯和端炔合成炔酮的无溶剂Sonogashira反应中，该催化剂表现出非常高的催化活性。优异的催化性能可归因于介孔结构和单分散CuO纳米颗粒的协同优势。
