DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kamran Qadir | - |
dc.contributor.author | Joo, Sang Hoon | - |
dc.contributor.author | Mun, Bongjin S. | - |
dc.contributor.author | Derek R. Butcher | - |
dc.contributor.author | Russ J. Renzas | - |
dc.contributor.author | Funda Aksoy | - |
dc.contributor.author | Zhi Liu | - |
dc.contributor.author | Gabor A. Somorjai | - |
dc.contributor.author | Park, JeongYoung | - |
dc.date.accessioned | 2013-03-29T14:11:36Z | - |
dc.date.available | 2013-03-29T14:11:36Z | - |
dc.date.created | 2012-08-13 | - |
dc.date.issued | 2012-04-26 | - |
dc.identifier.citation | 학회 창립 60주년 기념 2012년 봄 학술논문 발표회 | - |
dc.identifier.uri | http://hdl.handle.net/10203/171278 | - |
dc.description.abstract | Recent progress in controlled shape and sizes of nanoparticles using colloidal synthesis technique together with development of in-situ surface science characterization tools such as ambient pressure X-ray photoelectron spectroscopy (AP-XPS) has resulted in enhanced understanding of surface structure of working catalysts. We report AP-XPS study of Ru nanoparticles to monitor surface oxidation states under oxidizing, reducing and CO oxidation reaction conditions. Ru 2.8 and 6 nm nanoparticles were synthesized in the presence of poly(vinyl pyrrolidone) and deposited onto Si wafers by Langmuir-Blodgett deposition as model catalysts. It was found that Ru nanoparticle exhibited mild oxidative and reductive characters, suggesting presence of an oxide overlayer around metallic core. AP-XPS showed that such oxide formation is dependent on Ru nanoparticle size and we found higher oxide formation for Ru 6 nm nanoparticles at all temperatures. The catalytic activity of Ru nanoparticles increases as increasing nanoparticle size in the range of 2 – 6 nm. We suggest that enhancement in catalytic activity for larger nanoparticles are attributed to a stable surface oxide of core-shell nanoparticles. Such in-situ observations of Ru nanoparticles are useful in identifying active state of the catalysts during use and hence may allow for rational catalysts design for practical application. | - |
dc.language | English | - |
dc.publisher | 한국물리학회 | - |
dc.title | Intrinsic Relation between Catalytic Activity of CO Oxidation on Ru Nanoparticles and Stability of Ru Oxides Uncovered with Ambient Pressure XPS | - |
dc.type | Conference | - |
dc.type.rims | CONF | - |
dc.citation.publicationname | 학회 창립 60주년 기념 2012년 봄 학술논문 발표회 | - |
dc.identifier.conferencecountry | KO | - |
dc.identifier.conferencelocation | 대전컨벤션센터 | - |
dc.contributor.localauthor | Park, JeongYoung | - |
dc.contributor.nonIdAuthor | Kamran Qadir | - |
dc.contributor.nonIdAuthor | Joo, Sang Hoon | - |
dc.contributor.nonIdAuthor | Mun, Bongjin S. | - |
dc.contributor.nonIdAuthor | Derek R. Butcher | - |
dc.contributor.nonIdAuthor | Russ J. Renzas | - |
dc.contributor.nonIdAuthor | Funda Aksoy | - |
dc.contributor.nonIdAuthor | Zhi Liu | - |
dc.contributor.nonIdAuthor | Gabor A. Somorjai | - |
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