MnO2 Nanowire-CeO2 Nanoparticle Composite Catalysts for the Selective Catalytic Reduction of NOx with NH3
DC Field | Value | Language |
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dc.contributor.author | Kim, Su Hyo | - |
dc.contributor.author | Park, Bum Chul | - |
dc.contributor.author | Jeon, Yoo Sang | - |
dc.contributor.author | Kim, Young Keun | - |
dc.date.accessioned | 2021-09-02T06:17:38Z | - |
dc.date.available | 2021-09-02T06:17:38Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2018-09-26 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/73062 | - |
dc.description.abstract | MnOx-based catalysts have been applied to the selective catalytic reduction of NOx with ammonia (NH3) owing to their high NOx removal efficiency and catalytic stability. In general, the fabrication of a variety of nanomaterials in a complex structure requires complicated processes, including heat treatment and a series of cleaning steps. In addition, MnO2 which has diverse polymorphs, exhibits different catalytic effects depending on its crystalline structure. Among them, synthesizing the epsilon-MnO2 phase, which functions as a nanocatalyst, has been the most difficult and has hardly been reported. Here, we report the synthesis of heterostructured composite nanocatalysts consisting of epsilon-MnO2 nanowires (NWs) and CeO2 nanoparticles (NPs) by applying pulsed currents sequentially. This method drastically simplifies the overall process compared to the conventional techniques. Through X-ray diffraction and transmission electron microscopy, it was confirmed that 2-3 nm of CeO2 NPs were formed on the surfaces of the epsilon-MnO2 NWs. The de-NOx efficiency of the nanocatalysts was analyzed in terms of content variation, specific surface area, and the elemental chemical state of the surface. A ceramic filter containing the nanocatalysts shows a high catalytic activity over the broad operating temperature range 100-400 degrees C. In the low-temperature region, epsilon-MnO2 plays a major role in determining the catalytic property, which is consistent with the Brunauer-Emmett-Teller (BET), H-2 temperature-programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS) results. On the other hand, in the high-temperature region, the efficiency increases gradually as the content of CeO2 increases. The H-2 TPR, NH3-temperature-programmed desorption, and XPS patterns reveal why the composite exhibits such superior characteristics in the temperature range mentioned above. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | LOW-TEMPERATURE | - |
dc.subject | RATIONAL DESIGN | - |
dc.subject | MECHANISM | - |
dc.subject | OXIDES | - |
dc.subject | SCR | - |
dc.subject | ELECTRODEPOSITION | - |
dc.subject | EPSILON-MNO2 | - |
dc.subject | PERFORMANCE | - |
dc.subject | METALS | - |
dc.subject | FILMS | - |
dc.title | MnO2 Nanowire-CeO2 Nanoparticle Composite Catalysts for the Selective Catalytic Reduction of NOx with NH3 | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Young Keun | - |
dc.identifier.doi | 10.1021/acsami.8b09605 | - |
dc.identifier.scopusid | 2-s2.0-85053631874 | - |
dc.identifier.wosid | 000446142100031 | - |
dc.identifier.bibliographicCitation | ACS APPLIED MATERIALS & INTERFACES, v.10, no.38, pp.32112 - 32119 | - |
dc.relation.isPartOf | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 10 | - |
dc.citation.number | 38 | - |
dc.citation.startPage | 32112 | - |
dc.citation.endPage | 32119 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | LOW-TEMPERATURE | - |
dc.subject.keywordPlus | RATIONAL DESIGN | - |
dc.subject.keywordPlus | MECHANISM | - |
dc.subject.keywordPlus | OXIDES | - |
dc.subject.keywordPlus | SCR | - |
dc.subject.keywordPlus | ELECTRODEPOSITION | - |
dc.subject.keywordPlus | EPSILON-MNO2 | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | METALS | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordAuthor | MnO2 nanowires | - |
dc.subject.keywordAuthor | CeO2 nanoparticles | - |
dc.subject.keywordAuthor | composite nanocatalyst | - |
dc.subject.keywordAuthor | electrodeposition | - |
dc.subject.keywordAuthor | selective catalytic reduction | - |
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