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Durham University

Research & business

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Publication details for Dr Shan Jiang

Jiang, Shan, Cox, Harrison, Papaioannou, Evangelos, Tang, Chenyang, Liu, Huiyu, Murdoch, Billy J, Gibson, Emma K, Metcalfe, Ian, Evans, John S O & Beaumont, Simon Kenneth (2019). Shape-Persistent Porous Organic Cage Supported Palladium Nanoparticles as Heterogeneous Catalytic Materials. Nanoscale 11(31): 14929-14936.

Author(s) from Durham

Abstract

Porous Organic Cages (POCs) are an emerging class of self-assembling, porous materials with novel properties. They offer a
key advantage over other porous materials in permitting facile solution processing and re-assembly. The combination of
POCs with metal nanoparticles (NPs) unlocks applications in the area of catalysis. In this context, POCs can function as both
the template of ultra-small NPs and a porous, but reprocessable, heterogeneous catalyst support. Here, we demonstrate
the synthesis of ultra-small Pd NPs with an imine linked POC known as ‘CC3’, and show that hydrogen gas can be used to
form metallic NPs at ~ 200 °C without the reduction of the organic cage (and the accompanying, unwanted loss of
crystallinity). The resulting materials are characterized using a range of techniques (including powder diffraction, scanning
transmission electron microscopy and synchrotron x-ray absorption spectroscopy) and shown to be recrystallizable following
dissolution in organic solvent. Their catalytic efficacy is demonstrated using the widely studied carbon monoxide oxidation
reaction. This demonstration paves the way for using ultra-small NPs synthesized with POCs as solution-processable, selfassembling
porous catalytic materials.