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Redox property switching in MOFs with open metal sites for improved catalytic hydrogenation performance

Abstract

In this study, a decompression-thermalization strategy was utilized for a Cu-containing metal-organic framework (MOF) to tune its redox and catalytic hydrogenation properties. Remarkably, at just 120 °C, open metal sites (OMSs) were successfully constructed by removing coordinated solvent molecules to generate the daughter MOF-120. The tailored redox property of MOF-120 is correlated with the presence of OMSs. Compared with the pristine MOF where copper cations were capped by DMF, MOF-120 exhibited improved kinetics, showed a reduction of activation energy and outstanding recyclability in the hydrogenation of 4-nitrophenol under mild conditions (25 °C, 1 atm). Both experimental studies and theoretical calculation results reveal that the generation of OMSs endows the Cu species with unique electronic properties, which assist the adsorption and electron transfer between substrate molecules and is responsible for the enhanced performance in the hydrogenation process.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
JOURNAL OF ALLOYS AND COMPOUNDS no. 888,
ISSN: 0925-8388
Language:
English
Publication year:
2021
Bibliographic description:
Geng L., Zhou W., Wang X., Li T., Nowak A., Liu Z., Zhang Y., Zhang D., Zhang X., Han H.: Redox property switching in MOFs with open metal sites for improved catalytic hydrogenation performance// JOURNAL OF ALLOYS AND COMPOUNDS -Vol. 888, (2021), s.161494-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2021.161494
Verified by:
Gdańsk University of Technology

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