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곽자훈

Kwak, Ja Hun
Molecular Catalysis Lab.
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dc.citation.endPage 1026 -
dc.citation.number 6 -
dc.citation.startPage 1020 -
dc.citation.title ACS CATALYSIS -
dc.citation.volume 2 -
dc.contributor.author She, Xiaoyan -
dc.contributor.author Kwak, Jahun -
dc.contributor.author Sun, Junming -
dc.contributor.author Hu, Jianzhi -
dc.contributor.author Hu, Mary Y. -
dc.contributor.author Wang, Chongmin -
dc.contributor.author Peden, Charles H. F. -
dc.contributor.author Wang, Yong -
dc.date.accessioned 2023-12-22T05:07:47Z -
dc.date.available 2023-12-22T05:07:47Z -
dc.date.created 2015-07-20 -
dc.date.issued 2012-06 -
dc.description.abstract SBA-15 silica supported rhenium catalysts were synthesized using solution-based atomic layer deposition method, and their activity and stability were studied in the acid-catalyzed 2-butanol dehydration. We find that ReOx/SBA-15 exhibited an extremely high initial activity but a fast deactivation for 2-butanol dehydration at 90-105 degrees C. Fast deactivation was likely due to the sintering, sublimation, and reduction of rhenia as confirmed by TEM, elemental analysis, and in situ UV-vis (DRS) measurements. To overcome these issues, ReOx/AlOx/SBA-15 catalysts with significantly improved stability were prepared by first modifying the surface identity of SBA-15 with alumina followed by dispersion of rhenia using atomic layer deposition. The AlOx phase stabilizes the dispersion of small and uniform rhenia clusters (<2 nm) as as confirmed by TEM, STEM, and UV-vis (DRS) characterizations. Additional Al-27 MAS NMR characterization revealed that modification of the SBA-15 surface with alumina introduces a strong interaction between rhenia and alumina, which consequently improves the stability of supported rhenia catalysts by suppressing the sintering, sublimation, and reduction of rhenia albeit at a moderately reduced initial catalytic dehydration activity -
dc.identifier.bibliographicCitation ACS CATALYSIS, v.2, no.6, pp.1020 - 1026 -
dc.identifier.doi 10.1021/cs2006444 -
dc.identifier.issn 2155-5435 -
dc.identifier.scopusid 2-s2.0-84861815685 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/12291 -
dc.identifier.url http://pubs.acs.org/doi/abs/10.1021/cs2006444 -
dc.identifier.wosid 000304682600015 -
dc.language 영어 -
dc.publisher AMER CHEMICAL SOC -
dc.title.alternative Highly Dispersed and Active ReOx on Alumina-Modified SBA-15 Silica for 2-Butanol Dehydration -
dc.title Highly Dispersed and Active ReOx on Alumina-Modified SBA-15 Silica for 2-Butanol Dehydration -
dc.type Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor rhenia catalyst -
dc.subject.keywordAuthor catalyst stability -
dc.subject.keywordAuthor 2-butanol dehydration -
dc.subject.keywordAuthor SBA-15 -
dc.subject.keywordAuthor in situ UV-vis (DRS) -
dc.subject.keywordAuthor aberration-corrected TEM -
dc.subject.keywordAuthor Al-27 MAS NMR -
dc.subject.keywordPlus RHENIUM OXIDE CATALYSTS -
dc.subject.keywordPlus CARBON-SUPPORTED PLATINUM -
dc.subject.keywordPlus MESOPOROUS SILICA -
dc.subject.keywordPlus TUNGSTEN-OXIDE -
dc.subject.keywordPlus OLEFIN METATHESIS -
dc.subject.keywordPlus SELECTIVE OXIDATION -
dc.subject.keywordPlus RAMAN-SPECTROSCOPY -
dc.subject.keywordPlus SYNTHESIS GAS -
dc.subject.keywordPlus SURFACE -
dc.subject.keywordPlus HYDROGENATION -

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