Superior Low-Temperature NO Catalytic Performance of PrMn₂O₅ over SmMn₂O₅ Mullite-Type Catalysts

dc.contributor.ORCID0000-0002-7821-3001 (Hsu, JWP)
dc.contributor.ORCID0000-0002-6435-0347 (Chabal, YJ)
dc.contributor.ORCID0000-0003-2698-7774 (Cho, K)
dc.contributor.VIAF369148996084659752200 (Cho, K)
dc.contributor.authorThampy, Sampreetha
dc.contributor.authorAshburn, Nickolas
dc.contributor.authorLiu, C.
dc.contributor.authorXiong, K.
dc.contributor.authorDillon, Sean
dc.contributor.authorZheng, Yongping
dc.contributor.authorChabal, Yves J.
dc.contributor.authorCho, Kyeongjae
dc.contributor.authorHsu, Julia W. P.
dc.contributor.utdAuthorThampy, Sampreetha
dc.contributor.utdAuthorAshburn, Nickolas
dc.contributor.utdAuthorDillon, Sean
dc.contributor.utdAuthorZheng, Yongping
dc.contributor.utdAuthorChabal, Yves J.
dc.contributor.utdAuthorCho, Kyeongjae
dc.contributor.utdAuthorHsu, Julia W. P.
dc.date.accessioned2020-07-21T20:02:21Z
dc.date.available2020-07-21T20:02:21Z
dc.date.issued2019
dc.descriptionDue to copyright restrictions and/or publisher's policy full text access from Treasures at UT Dallas is limited to current UTD affiliates (use the provided Link to Article).
dc.description.abstractBy studying their surface chemistry, metal-oxygen bond strength, and critical energy barrier heights, we elucidate the differences in the NO oxidation catalytic performance of PrMn₂O₅ and SmMn₂O₅ mullite-type oxides. The 50% conversion temperature is lower (230 °C vs. 275 °C) and the maximum conversion efficiency is higher (81% at 282 °C vs. 68% at 314 °C) for PrMn₂O₅ compared to SmMn₂O₅, despite having a ∼15% lower specific surface area. Furthermore, PrMn₂O₅ exhibits higher maximum efficiency compared to Pt/Al₂O₃. Combined experimental and theoretical findings indicate that the superior catalytic performance of PrMn₂O₅ at low temperatures arises from the presence of more labile and reactive surface lattice oxygen due to weaker Mn-O bond strength and lower thermal stability of surface NOₓ ad-species. ©2019 The Royal Society of Chemistry.
dc.description.departmentErik Jonsson School of Engineering and Computer Science
dc.description.sponsorshipWelch Foundation grant (AT-1843); International Energy Joint R & D Program (No. 20168510011350); Dongguan Innovative Research Team Program (No. 20146071007).
dc.identifier.bibliographicCitationThampy, S., N. Ashburn, C. Liu, K. Xiong, et al. 2019. "Superior lowerature NO catalytic performance of PrMn₂O₅ over SmMn₂O₅ mullite-type catalysts." Catalysis Science and Technology 9(11): 2758-2766, doi: 10.1039/c9cy00490d
dc.identifier.issn2044-4753
dc.identifier.issue11
dc.identifier.urihttp://dx.doi.org/10.1039/c9cy00490d
dc.identifier.urihttps://hdl.handle.net/10735.1/8722
dc.identifier.volume9
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.rights©2019
dc.source.journalCatalysis Science and Technology
dc.subjectOxidation
dc.subjectMullite
dc.subjectOxygen
dc.subjectPlatinum compounds
dc.subjectPraseodymium compounds
dc.subjectSamarium compounds
dc.subjectSilicate minerals
dc.subjectSurface chemistry
dc.subjectThermodynamic equilibrium
dc.subjectLow temperatures
dc.subjectManganese compounds
dc.titleSuperior Low-Temperature NO Catalytic Performance of PrMn₂O₅ over SmMn₂O₅ Mullite-Type Catalysts
dc.type.genrearticle

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