Location determination of metal nanoparticles relative to a metal-organic framework

Nature Communications
Yu-Zhen ChenHai-Long Jiang

Abstract

Metal nanoparticles (NPs) stabilized by metal-organic frameworks (MOFs) have been intensively studied in recent decades, while investigations on the location of guest metal NPs relative to host MOF particles remain challenging and very rare. In this work, we have developed several characterization techniques, including high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) tomography, hyperpolarized 129Xe NMR spectroscopy and positron annihilation spectroscopy (PAS), which are able to determine the specific location of metal NPs relative to the MOF particle. The fine PdCu NPs confined inside MIL-101 exhibit excellent catalytic activity, absolute selectivity and satisfied recyclability in the aerobic oxidation of benzyl alcohol in pure water. As far as we know, the determination for the location of metal NPs relative to MOF particles and pore structure information of metal NPs/MOF composites by 129Xe NMR and PAS techniques has not yet been reported.

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Citations

Apr 8, 2020·Angewandte Chemie
Jul 15, 2020·Proceedings of the National Academy of Sciences of the United States of America·Qingbin ZengXin Zhou
Sep 10, 2020·Advanced Materials·Shenhui LiFeng Deng
Oct 13, 2020·Organic & Biomolecular Chemistry·Yu WangQiang Xu
Dec 8, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Yohei TakashimaKensuke Akamatsu
Mar 11, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Yu LinYaqiong Gong
May 14, 2021·The Journal of Physical Chemistry Letters·Suhwan KimKwanghyo Son

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Methods Mentioned

BETA
X-ray
transmission electron microscopy
atomic emission spectrometry
NMR
transmission
scanning

Software Mentioned

LTv9
INSPECT3D
AVIZO

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