Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.apcatb.2020.119756
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dc.titleDifferences in oxidation-reduction kinetics and mobility of Cu species in fresh and SO2-poisoned Cu-SSZ-13 catalysts
dc.contributor.authorVitaly V. Mesilov
dc.contributor.authorSusanna L. Bergman
dc.contributor.authorSandra Dahlin
dc.contributor.authorYang Xiao
dc.contributor.authorShibo Xi
dc.contributor.authorMa Zhirui
dc.contributor.authorLian Xu
dc.contributor.authorWei Chen
dc.contributor.authorLars J. Pettersson
dc.contributor.authorSteven L. Bernasek
dc.date.accessioned2020-12-21T06:19:21Z
dc.date.available2020-12-21T06:19:21Z
dc.date.issued2020-11-27
dc.identifier.citationVitaly V. Mesilov, Susanna L. Bergman, Sandra Dahlin, Yang Xiao, Shibo Xi, Ma Zhirui, Lian Xu, Wei Chen, Lars J. Pettersson, Steven L. Bernasek (2020-11-27). Differences in oxidation-reduction kinetics and mobility of Cu species in fresh and SO2-poisoned Cu-SSZ-13 catalysts. Applied Catalysis B: Environmental : 119756. ScholarBank@NUS Repository. https://doi.org/10.1016/j.apcatb.2020.119756
dc.identifier.issn0926-3373
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/184945
dc.description.abstractFresh and SO2-poisoned Cu-SSZ-13 selective catalytic reduction (SCR) catalysts were studied using near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) in the presence of NH3, O2, and NO, as well as by in situ X-ray absorption spectroscopy (XAS) using H2, He, and CO. In contrast to the fresh catalyst, inhibited reduction of Cu-species and the absence of Cu-metal nanoparticles was found in the SO2-poisoned catalyst during heating/cooling in H2 and CO. High structural disorder and differences in the formation of Cu-carbonyl species were seen for the SO2-poisoned catalyst compared to the fresh catalyst. Suppressed oxidation-reduction and low mobility of Cu-species during exposure to NH3-SCR-related gases were observed in the SO2-poisoned catalyst, unlike in the fresh catalyst. These observations help explain catalyst deactivation during the standard NH3-SCR reaction. The formation of Cu-metal nanoparticles in the fresh catalyst revealed another possible deactivation pathway for the SCR-catalyst in combined LNT-SCR systems during fuel-rich periods.
dc.publisherElsevier B.V.
dc.subjectCu-SSZ-13
dc.subjectLNT-SCR
dc.subjectSO2 poisoning
dc.subjectXAS
dc.subjectNAP-XPS
dc.typeArticle
dc.contributor.departmentDEAN'S OFFICE (YALE-NUS COLLEGE)
dc.contributor.departmentDEPT OF CHEMISTRY
dc.description.doi10.1016/j.apcatb.2020.119756
dc.description.sourcetitleApplied Catalysis B: Environmental
dc.description.page119756
dc.published.statePublished
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