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Catalytic decomposition of NO2 over a copper-decorated metal-organic framework by non-thermal plasma

Xu, Shaojun, Han, Xue, Ma, Yujie, Duong, Thien D., Lin, Longfei, Gibson, Emma K., Sheveleva, Alena, Chansai, Sarayute, Walton, Alex, Ngo, Duc-The, Frogley, Mark D., Tang, Chiu C., Tuna, Floriana, McInnes, Eric J.L., Catlow, C. Richard A., Hardacre, Christopher, Yang, Sihai and Schröder, Martin 2021. Catalytic decomposition of NO2 over a copper-decorated metal-organic framework by non-thermal plasma. Cell Reports Physical Science 2 (2) , 100349. 10.1016/j.xcrp.2021.100349

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Efficient catalytic conversion of NO2 to non-harmful species remains an important target for research. State-of-the-art deNOx processes are based upon ammonia (NH3)-assisted selective catalytic reduction (NH3-SCR) over Cu-exchanged zeolites at elevated temperatures. Here, we describe a highly efficient non-thermal plasma (NTP) deNOx process catalyzed by a Cu-embedded metal-organic framework, Cu/MFM-300(Al), at room temperature. Under NTP activation at 25°C, Cu/MFM-300(Al) enables direct decomposition of NO2 into N2, NO, N2O, and O2 without the use of NH3 or other reducing agents. NO2 conversion of 96% with a N2 selectivity of 82% at a turnover frequency of 2.9 h−1 is achieved, comparable to leading NH3-SCR catalysts that use NH3 operating at 250°C–550°C. The mechanism for the rate-determining step (NO→N2) is elucidated by in operando diffuse reflectance infrared Fourier transform spectroscopy, and electron paramagnetic resonance spectroscopy confirms the formation of Cu2+⋯NO nitrosylic adducts on Cu/MFM-300(Al), which facilitates NO dissociation and results in the notable N2 selectivity.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Additional Information: This is an open access article under the CC BY license (
ISSN: 2666-3864
Funders: EPSRC and Royal Society
Date of First Compliant Deposit: 10 March 2021
Date of Acceptance: 27 January 2021
Last Modified: 30 Jan 2022 11:14

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