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Probing the Dynamics of CO2 and CH4 within the Porous Zirconium Terephthalate UiO‐66(Zr): A Synergic Combination of Neutron Scattering Measurements and Molecular Simulations
Abstract
Quasi‐elastic neutron scattering (QENS) measurements combined with molecular dynamics (MD) simulations were conducted to deeply understand the concentration dependence of the self‐ and transport diffusivities of CH 4 and CO 2, respectively, in the humidity‐resistant metal–organic framework UiO‐66(Zr). The QENS measurements show that the self‐diffusivity profile for CH 4 exhibits a maximum, while the transport diffusivity for CO 2 increases continuously at the loadings explored in this study. Our MD simulations can reproduce fairly well both the magnitude and the concentration dependence of each measured diffusivity. The flexibility of the framework implemented by deriving a new forcefield for UiO‐66(Zr) has a significant impact on the diffusivity of the two species. Methane diffuses faster than CO 2 over a broad range of loading, and this is in contrast to zeolites with narrow windows, for which opposite trends were observed. Further analysis of the MD trajectories indicates that the global microscopic diffusion mechanism involves a combination of intracage motions and jump sequences between tetrahedral and octahedral cages.
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Cites
Millward, A. R., & Yaghi, O. M. (2005) · Journal of the American Chemical Society · doi:10.1021/ja0570032 · Cited by 2,876
Cited by
Wu, H., Chua, Y. S., Krungleviciute, V., Tyagi, M., Chen, P., Yildirim, T., & Zhou, W. (2013) · Journal of the American Chemical Society · doi:10.1021/ja404514r · Cited by 1,457
Winarta, J., Shan, B., Mcintyre, S. M., Ye, L., Wang, C., Liu, J., & Mu, B. (2020) · Crystal Growth & Design · doi:10.1021/acs.cgd.9b00955 · Cited by 641
H2storage in isostructural UiO-67 and UiO-66 MOFs
Chavan, S., Vitillo, J. G., Gianolio, D., Zavorotynska, O., Civalleri, B., Jakobsen, S., Nilsen, M. H., Valenzano, L., Lamberti, C., Lillerud, K. P., et al. (2012) · Phys. Chem. Chem. Phys. · doi:10.1039/c1cp23434j · Cited by 485
Metadata
- Authors
- Yang, Q., Jobic, H., Salles, F., Kolokolov, D., Guillerm, V., Serre, C., & Maurin, G.
- Venue
- Chemistry – A European Journal
- Publisher
- Wiley
- Published
- 2011-06-28
- Volume
- 17
- Issue
- 32
- Pages
- 8882-8889
- ISSN
- 0947-6539 (ISSN-L)
- 1521-3765
- OpenAlex
- W2138953685
- Cited by
- 158
- References
- 1
- FWCI
- 8.10
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, Q., Jobic, H., Salles, F., Kolokolov, D., Guillerm, V., Serre, C., & Maurin, G. (2011). Probing the Dynamics of CO2 and CH4 within the Porous Zirconium Terephthalate UiO‐66(Zr): A Synergic Combination of Neutron Scattering Measurements and Molecular Simulations. Chemistry – A European Journal. https://doi.org/10.1002/chem.201003596
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