Journal
CHEM CATALYSIS
Volume 2, Issue 1, Pages 84-101Publisher
CELL PRESS
DOI: 10.1016/j.checat.2021.10.007
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Funding
- National Natural Science Foundation of China [21471118, 21971199, 22025106, 51202127, 91545205, 91622103]
- National Key Research and Development Project of China [2018YFA0704000]
- Natural Science Foundation of Hubei Province [2016CFB382]
- Fundamental Research Funds for the Central Universities [2042017kf0227, 2042019kf0205]
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The study achieved precise positioning of different metals in multivariate metal-organic frameworks, forming an alternating sequence to improve the efficiency of oxygen evolution reaction.
Inorganic porous materials are prevailing in energy storage, environment remediation, and catalysis; however, it is attractive to control the spatial arrangement of heterometals in these materials with atomic accuracy. Here, we report the precise positioning of metals with identical valence, coordination number, and similar size, such as Zn (II) and Co (II), to generate an alternating sequence in a multivariate (MTV) metal- organic framework ( MOF), ZnCo-MTV- MOF699, with a rare sheet secondary building unit. This is achieved by precoding their coordination number in a parent MOF, ZnCoMOF- 69C, followed by single-crystal-to-single-crystal transformation, where the entire process is monitored in situ by time- resolved small-angle X-ray scattering. Coordination number precoding of other metal pairs, Zn-Ni and Zn-Cu, in MTV-MOFs is also obtained. The sequence-codedMTV-MOF exhibits amuch lower overpotential than that of the non-coded counterpart in oxygen evolution reaction, unveiling the power of metal sequence control.
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