Stability Trend of Metal–Organic Frameworks with Heterometal-Modified Hexanuclear Zr Building Units
Name
Stability Trend of Metal−Organic Frameworks with Heterometal-Modified Hexanuclear Zr Building Units.pdf
Size
1.07 MB
Format
Adobe PDF
Checksum (MD5)
41710031cc9e2a9244897b42573e811c
Author(s)
Yuan, Shuai
Peng, Jiayu
Zhang, Yirui
Shao-Horn, Yang
Date Issued
October 2019
Journal
Journal of Physical Chemistry C
Publisher
American Chemical Society (ACS)
Citation
Yuan, Shuai et al. "Stability Trend of Metal–Organic Frameworks with Heterometal-Modified Hexanuclear Zr Building Units." Journal of Physical Chemistry C 123, 46 (October 2019): 28266–28274 © 2019 American Chemical Society
Version
Author's final manuscript
Abstract
Bimetallic metal–organic frameworks (MOFs) based on heterometal-modified hexanuclear Zr building units have emerged as promising materials for applications in energy-related fields such as heterogenous catalysis/electrocatalysis. However, their stability remains a challenge under some practical conditions, and the physical/chemical origin to the (in)stability is not well-understood. Herein, we selected three representative Zr-MOFs (MOF-808, NU-1000, and UiO-66) as platforms and incorporated different heterometals (Ti4+, V3+, V5+, Cr3+, Cr6+, Mn2+, Fe2+, Fe3+, Co2+, Ni2+, Cu2+, and Zn2+) to form a series of bimetallic M/Zr-MOFs. Their stability was examined in aqueous solutions of various pH to define their stability windows and understand their stability trend. The stability of M/Zr-MOFs was found to be dictated by the oxidation states of incorporated heterometals and slightly affected by the supporting Zr-MOFs. Water-exchange rate constant, defined as the rate constant by replacing a coordinated water with a solution water, was proposed as the stability descriptor to explain the stability trend and guide the design and application of future stable MOFs.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Chemical Engineering
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DOI of Published Version
https://doi.org/10.1021/acs.jpcc.9b08749
