Cluster assisted water dissociation mechanism in MOF-74 and controlling it using helium

Sebastian Zuluaga, Erika M.A. Fuentes-Fernandez, Kui Tan, Jing Li, Yves J. Chabal, Timo Thonhauser

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3 Citations (Scopus)

Abstract

We show that the water dissociation reaction H2O → OH + H in the confined environment of MOF-74 channels can be precisely controlled by the addition of noble gas He. Elucidating the entire reaction process using ab initio methods and infrared (IR) spectroscopy, we prove that the interaction between water molecules is critical to the formation of water clusters, which reduce the dissociation barrier by up to 37% and thus influence the reaction significantly. Our time-resolved IR measurements confirm that the formation of these clusters can be suppressed by introducing He gas, providing unprecedented control over water dissociation rates. Since the water dissociation reaction is the cause of the structural instability of MOF-74 in the presence of water, our finding of the reaction mechanism lays the groundwork for designing water stable versions of MOF-74 as well as understanding water related phenomena in MOFs in general.

Original languageEnglish
Pages (from-to)11524-11530
Number of pages7
JournalJournal of Materials Chemistry A
Volume4
Issue number29
DOIs
Publication statusPublished - Jan 1 2016

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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    Zuluaga, S., Fuentes-Fernandez, E. M. A., Tan, K., Li, J., Chabal, Y. J., & Thonhauser, T. (2016). Cluster assisted water dissociation mechanism in MOF-74 and controlling it using helium. Journal of Materials Chemistry A, 4(29), 11524-11530. https://doi.org/10.1039/c6ta02501c