Issue 45, 2022

A robust hollow metal–organic framework with enhanced diffusion for size selective catalysis

Abstract

Single crystalline (SC) hollow metal–organic frameworks (MOFs) are excellent host materials for molecular and nanoparticle catalysts. However, due to synthetic challenges, chemically robust SC hollow MOFs are rare. This work reports the construction of a defect-free and chemically stable SC hollow MOF, MOF-801(h), through templated growth from a unit cell mismatched core, UiO-66. Under the protection of excess MOF-801 ligand, fumaric acid, the MOF-801 shell was perfectly retained while the isoreticular UiO-66 core was selectively and completely etched away by formic acid. The combination of a large cavity, small aperture and short diffusion length allows the Pt nanoparticle encapsulated composite catalyst, Pt⊂MOF-801(h), to perform size selective hydrogenation of nitro compounds at an accelerated speed. Impressively, the catalyst can undergo concentrated HCl or boiling water treatment while maintaining its crystallinity, morphology, catalytic activity, and size selectivity. In addition, Au nanoparticles encapsulated catalyst, Au⊂MOF-801(h), was used for the size selective nucleophilic addition of HCl to terminal alkynes for the first time, which is a harsh reaction involving high concentrations of a strong acid.

Graphical abstract: A robust hollow metal–organic framework with enhanced diffusion for size selective catalysis

Supplementary files

Article information

Article type
Edge Article
Submitted
20 May 2022
Accepted
15 Oct 2022
First published
24 Oct 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 13338-13346

A robust hollow metal–organic framework with enhanced diffusion for size selective catalysis

C. Wu, X. Zhao, D. Wang, X. Si and T. Li, Chem. Sci., 2022, 13, 13338 DOI: 10.1039/D2SC02838G

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