Greenaway, Alex G., Marberger, Adrian, Thetford, Adam, Lezcano-González, Inés, Agote-Arán, Miren, Nachtegaal, Maarten, Ferri, Davide, Kröcher, Oliver, Catlow, C. Richard A.  ORCID: https://orcid.org/0000-0002-1341-1541 and Beale, Andrew M.
2020.
Detection of key transient Cu intermediates in SSZ-13 during NH3-SCR deNOx by modulation excitation IR spectroscopy.
Chemical Science
11
(2)
, pp. 447-455.
10.1039/C9SC04905C
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Abstract
The small pore zeolite Cu-SSZ-13 is an efficient material for the standard selective catalytic reduction of nitrogen oxides (NOx) by ammonia (NH3). In this work, Cu-SSZ-13 has been studied at 250 °C under high conversion using a modulation excitation approach and analysed with phase sensitive detection (PSD). While the complementary X-ray absorption near edge structure (XANES) spectroscopy measurements showed that the experiments were performed under cyclic Cu+/Cu2+ redox, Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) experiments provide spectroscopic evidence for previously postulated intermediates Cu–N([double bond, length as m-dash]O)–NH2 and Cu–NO3 in the NH3-SCR deNOx mechanism and for the role of [Cu2+(OH−)]+. These results therefore help in building towards a more comprehensive understanding of the reaction mechanism which to date has only been postulated in silico.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Professional Services > Advanced Research Computing @ Cardiff (ARCCA) Research Institutes & Centres > Cardiff Catalysis Institute (CCI) Schools > Chemistry |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 2041-6520 |
| Funders: | EPSRC |
| Date of First Compliant Deposit: | 28 January 2020 |
| Date of Acceptance: | 15 November 2019 |
| Last Modified: | 02 Jul 2025 10:28 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/129084 |
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