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Magnetically recyclable nanocatalyst with synergetic catalytic effect and its application for 4-nitrophenol reduction and Suzuki coupling reactions
- Duan, Xianming, Liu, Jin, Hao, Jufang, Wu, Lingmin, He, Baojiang, Qiu, Yuan, Zhang, Juan, He, Zhaolin, Xi, Jiangbo, Wang, Shuai
- Carbon 2018 v.130 pp. 806-813
- active sites, carbon, catalysts, catalytic activity, chemical reactions, iron, magnetic fields, nanoparticles, nanospheres, nitrogen, p-nitrophenol, porous media
- Magnetically recyclable catalysts with high activity are highly desired in heterogeneous catalysis, as their magnetic nature allows the facile and efficient separation under an external magnetic field. We developed a facile method to fabricate a new type of recyclable nanocatalyst based on double-shelled hollow nanospheres (HNSs) supported Pd nanoparticles (NPs), in which magnetic Fe species were served as inner shell and nitrogen doped carbon (NC) as outer shell. The resultant Fe@NC@Pd HNSs possess unique hollow structure and mesoporous shells for facile mass transportation, magnetic inner shell for easy recycling and well dispersed Pd NPs for high-density of catalytic sites. The magnetic Fe-based inner shell, catalytically active outer NC shell combined with ultrafine Pd NPs synergistically enhanced the catalytic activity and recyclability in organocatalysis. In 4-nitrophenol reduction reaction, the turnover frequency (TOF) of Fe@NC@Pd catalyst is up to 370.3 min−1, which is one of the highest efficiencies ever reported. Furthermore, Fe@NC@Pd can also be applied for Suzuki coupling reaction with the TOF as high as 52.7 min−1.