Adsorption of nitrogen dioxide in a redox-active vanadium metal-organic framework material

Xue Han, Yuexian Hong, Yujie Ma, Wanpeng Lu, Jiangnan Li, Longfei Lin, Alena M. Sheveleva, Floriana Tuna, Eric J.l. Mcinnes, Catherine Dejoie, Junliang Sun, Sihai Yang, Martin Schröder

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Abstract

Nitrogen dioxide (NO2) is a toxic air pollutant and efficient abatement technologies are important to mitigate the many associated health and environmental problems. Here we report the reactive adsorption of NO2 in a redox-active metal-organic framework (MOF), MFM-300(V). Adsorption of NO2 induces the oxidation of V(III) to V(IV) centres in MFM-300(V), and this is accompanied by the reduction of adsorbed NO2 to NO and the release of water via deprotonation of the framework hydroxyl groups, as confirmed by synchrotron X-ray diffraction and various experimental techniques. The efficient packing of {NO2∙N2O4}∞ chains in the pores of MFM-300(VIV) results in a high isothermal NO2 uptake of 13.0 mmol g-1 at 298 K and 1.0 bar, and is retained for multiple adsorption-desorption cycles. This work will inspire the design of redox-active sorbents that exhibit reductive adsorption of NO2 for the elimination of air pollutants.
Original languageEnglish
JournalJournal of the American Chemical Society
Early online date26 Jul 2020
DOIs
Publication statusE-pub ahead of print - 26 Jul 2020

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