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

Yu-Zhen Chen, Bingchuan Gu, Takeyuki Uchida, Jiandang Liu, Xianchun Liu, Bang-Jiao Ye, Qiang Xu and Hai-Long Jiang ()
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Yu-Zhen Chen: University of Science and Technology of China
Bingchuan Gu: University of Science and Technology of China
Takeyuki Uchida: National Institute of Advanced Industrial Science and Technology (AIST)
Jiandang Liu: University of Science and Technology of China
Xianchun Liu: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Bang-Jiao Ye: University of Science and Technology of China
Qiang Xu: National Institute of Advanced Industrial Science and Technology (AIST)
Hai-Long Jiang: University of Science and Technology of China

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: 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.

Date: 2019
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DOI: 10.1038/s41467-019-11449-6

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