Well‐Arranged and Confined Incorporation of PdCo Nanoparticles within a Hollow and Porous Metal–Organic Framework for Superior Catalytic Activity

Well‐dispersed and ultrafine bimetallic PdCo nanoparticles are confined within a unique hollow and porous ZIF support by the one‐step pyrolysis of polystyrene@ZIF‐67/Pd²⁺ core–shell microspheres. The pyrolysis process involves several simultaneous chemical conversions and the resulting composite (PdCo@HZIF) displays superior catalytic activity.

Abstract

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/Pd²⁺ 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 Co²⁺ supplier for metal nanoparticle formation; and Pd²⁺ and Co²⁺ are reduced to form catalytically active bimetallic PdCo nanoparticles in the well‐defined micropores, inducing the confined growth of PdCo nanoparticles with excellent dispersity.

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