Hydrogen Storage and Selective, Reversible O2 Adsorption in a Metal-Organic Framework with Open Chromium(II) Sites

Published

July 18, 2016

Author(s)

Eric D. Bloch, Wendy L. Queen, Matthew Ross Hudson, Jarad A. Mason, Dianne J. Xiao, Leslie J. Murray, Roxana Flacau, Craig Brown, Jeffrey R. Long

Abstract

A chromium(II)-based metal-organic framework, Cr₃[Cr₄Cl)₃(BTT)₈]₂ (Cr-BTT;BTT^3- = 1,3,5-benzenetrisetrazolate), featuring coordinatively-unsaturated, redox-active Cr²⁺ cation sites was synthesized and investigated for potential applications in H₂ adsorption and neutron powder diffraction experiments reveal moderately strong Cr-H₂ interactions, in line with results from previously reported M-BTT frameworks. Notably, gas adsorption measurements also reveal excellent O₂/N₂ selectivity with substantial O₂ reversibility at room temperature, based on selective electron transfer to form Cr^III- superoxide moieties. Infrared spectroscopy and powder neutron diffraction experiments were used to confirm this mechanism of selective O₂ binding.

Citation

Angewandte Chemie-International Edition

Volume

55

Issue

30

Pub Type

Journals

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Keywords

hydrogen storage, neutron diffraction, metal organic framework

Citation

Bloch, E. , Queen, W. , Hudson, M. , Mason, J. , Xiao, D. , Murray, L. , Flacau, R. , Brown, C. and Long, J. (2016), Hydrogen Storage and Selective, Reversible O₂ Adsorption in a Metal-Organic Framework with Open Chromium(II) Sites, Angewandte Chemie-International Edition, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921119 (Accessed January 25, 2025)