Choi Sora, Oh Moonhyun
Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Korea.
Angew Chem Int Ed Engl. 2019 Jan 14;58(3):866-871. doi: 10.1002/anie.201812827. Epub 2018 Dec 17.
A convenient method for the confined incorporation of highly active bimetallic PdCo nanocatalysts within a hollow and porous metal-organic framework (MOF) support is presented. Several chemical conversions occur simultaneously during the one-step low temperature pyrolysis of well-designed polystyrene@ZIF-67/Pd core-shell microspheres, where ZIF (zeolitic imidazolate framework) is a subclass of MOF: the polystyrene core is removed, resulting in a beneficial hollow and porous ZIF support; the ZIF-67 shell acts as a well-defined porous support and as a felicitous Co supplier for metal nanoparticle formation; and Pd and Co are reduced to form catalytically active bimetallic PdCo nanoparticles in the well-defined micropores, inducing the confined growth of PdCo nanoparticles with excellent dispersity.
本文提出了一种将高活性双金属钯钴纳米催化剂限制在中空多孔金属有机骨架（MOF）载体中的简便方法。在精心设计的聚苯乙烯@ZIF-67/Pd核壳微球的一步低温热解过程中，会同时发生几种化学转化，其中ZIF（沸石咪唑酯骨架）是MOF的一个子类：聚苯乙烯核被去除，从而得到有益的中空多孔ZIF载体；ZIF-67壳作为明确的多孔载体和金属纳米颗粒形成的合适钴供应商；钯和钴被还原，在明确的微孔中形成具有催化活性的双金属钯钴纳米颗粒，诱导钯钴纳米颗粒的限制生长，具有优异的分散性。
