Journal
MATERIALS TODAY NANO
Volume 17, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtnano.2021.100158
Keywords
Metal-organic frameworks; Doping; Mechanochemical conversion; Mixed-metal metal-organic frameworks; CO oxidation
Funding
- Science and Technology Commission of Shanghai Municipality [19YF1433300]
- ShanghaiTech University Startup Fund
- China Postdoctoral Science Foundation [2020M681343]
- Center for high-resolution electron microscopy (C-EM) [EM02161943]
- SPST, ShanghaiTech University
- Analytical Instrumentation Center [SPST-AIC10112914]
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Pt-doped Zn-MOF-74 was prepared through a mechanochemical conversion approach, showing potential as active sites for catalyzing CO oxidation reaction. This study provides a novel design strategy for the synthesis of mixed-metal metal-organic frameworks with extended functionalities.
Mixed-metal metal-organic frameworks (MM-MOFs) contain more than one type of metal node, which can improve or even introduce new features compared with the single metal frameworks. Traditionally, most of the MM-MOFs are synthesized by solution method which requires all the metal ions to form stable coordination with the ligand in a single framework and therefore limits the choice of the metal ions. In this work, Pt-doped Zn-MOF-74 (PtZn-MOF-74) has been prepared through a mechanochemical conversion approach from Pt-doped ZnO (Pt-ZnO) directly. The absence of a large quantity of solvent limits the solvation and diffusion of growth species during the mechanochemical conversion and therefore prevented the agglomeration of Pt dopants in PtZn-MOF-74. CO oxidation was used to evaluate the catalytic performance of the prepared MM-MOFs. Compared with inert Zn-MOF-74, PtZn-MOF-74 with unsaturated coordinated Pt at elevated temperature can act as the active sites to catalyze CO oxidation reaction. This study provides a novel design strategy for the synthesis of MM-MOFs with extended functionalities. (C) 2021 Elsevier Ltd. All rights reserved.
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