Elucidating the Effect of Ion Exchange Protocol on the Copper Exchange Efficacy, Copper Siting, and SCR activity in Cu-SSZ-13

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dc.contributor.authorKoishybay, Aibolaten
dc.contributor.authorUmhey, Charlesen
dc.contributor.authorKuo, Chun-Teen
dc.contributor.authorGroden, Kyleen
dc.contributor.authorMcEwen, Jean-Sabinen
dc.contributor.authorKarim, Ayman M.en
dc.contributor.authorShantz, Daniel F.en
dc.date.accessioned2023-06-28T12:55:31Zen
dc.date.available2023-06-28T12:55:31Zen
dc.date.issued2023-05en
dc.description.abstractThe influence of the copper ion exchange protocol on SCR activity of SSZ-13 is quantified. Using the same parent SSZ-13 zeolite, four exchange protocols are used to assess how exchange protocol impacts metal uptake and SCR activity. Large differences in the SCR activity, nearly 30 percentage points at 160 degrees C at constant copper content, are observed for different exchange protocols implying that different exchange protocols lead to different copper species. Hydrogen temperature programmed reduction on selected samples and infrared spectroscopy of CO binding corroborates this conclusion as the reactivity at 160 degrees C correlates with the intensity of the IR band at 2162 cm(-1). DFT-based calculations show that such an IR assignment is consistent with CO adsorbed on a Cu(I) cation within an eight-membered ring. This work shows that SCR activity can be influenced by the ion exchange process even when different protocols lead to the same metal loading. Perhaps most interesting, a protocol used to generate Cu-MOR for methane to methanol studies led to the most active catalyst both on a unit mass or unit mole copper basis. This points to a yet not recognized means to tailor catalyst activity as the open literature is silent on this issue.en
dc.description.notesAMK and C-TK acknowledge funding from the American Chemical Society Petroleum Research Fund under award number PRF# 55575-ND5. DFS acknowledges funding from the American Chemical Society Petroleum Research Fund Award #57697-ND5 which partially supported this work. The DFT-based calculations in the paper were performed in the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the DOE's Office of Biological and Environmental Research and located at PNNL. Financial support to WSU was partly provided by the National Science Foundation CAREER program under contract No. CBET-1653561. Financial support to WSU was also partly provided by the National Science Foundation under contract No. CBET-2035280. PNNL is operated for the US DOE by Battelle.en
dc.description.sponsorshipUS DOE by Battelle; American Chemical Society Petroleum Research Fund [55575-ND5]; DOE's Office of Biological and Environmental Research; National Science Foundation [CBET-1653561, CBET-2035280]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1002/cphc.202300271en
dc.identifier.eissn1439-7641en
dc.identifier.issn1439-4235en
dc.identifier.pmid37074735en
dc.identifier.urihttp://hdl.handle.net/10919/115558en
dc.language.isoenen
dc.publisherWiley-VCHen
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectselective catalytic-reductionen
dc.subjectcuen
dc.subjectnoxen
dc.subjectnh3en
dc.subjectzeolitesen
dc.subjectdecompositionen
dc.subjectdeactivationen
dc.subjectoxidationen
dc.subjectcu-zsm-5en
dc.subjectnh3-scren
dc.titleElucidating the Effect of Ion Exchange Protocol on the Copper Exchange Efficacy, Copper Siting, and SCR activity in Cu-SSZ-13en
dc.title.serialChemPhysChemen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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