posted on 2019-09-17, 11:33authored byYang Xu, Yuxing Yao, Haitao Yu, Buyin Shi, Shengguang Gao, Li Zhang, Abigail L. Miller, Jen-Chun Fang, Xiaoguang Wang, Kun Huang
We report the use
of hyper-cross-linked polymers for synthesis
of hollow porous polymeric nanosphere frameworks (HPPNFs) as highly
efficient yolk–shell structured catalysts. This approach involves
encapsulation of ligand-free metal nanoparticles within the hyper-cross-linked
HPPNFs, giving rise to remarkable catalytic activity as well as outstanding
reusability toward hydrogenation. By tuning the molecular size of
the reactant, we demonstrate intrinsic size selectivity precisely
defined by the HPPNF-based catalyst. Because the solvent polarity
determines the porosity of the HPPNFs, it provides guidance to design
a class of responsive and functional soft materials for use in catalysis
technology.