| 학회 |
한국화학공학회 |
| 학술대회 |
2014년 봄 (04/23 ~ 04/25, 창원컨벤션센터) |
| 권호 |
20권 1호, p.962 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Synthesis and Catalytic Properties of thin layer oxide encapsulated hybrid nanocatalysts |
| 초록 |
Surfactants or organic capping agents or polymer, which are widely used in colloidal chemistry to stabilize nanoparticles at mild conditions, decompose at high temperatures, leaving the uncapped nanoparticles unprotected against sintering and deactivation. In order to prevent the sintering effect, many efforts have been devoted to design thermally stable hybrid nanocatalyst. Here, we present hybrid nanocatalysts with ultrathin oxide encapsulation (SiO2/M/TiO2, M=Pt, Rh, Ru) synthesized by an simple surface-modified chemical processes. Specifically, Metal nanoparticles capped with citrate are successfully assembled on the functionalized SiO2 via electrostatic interaction and finally an ultrathin layer of the metal-oxide coated on surface. TEM studies confirmed that metal nanoparticles are uniformly dispersed and distributed throughout the surface. In particular, to investigate the presence of a thin layer as well as uniformity of the coating, energy-dispersive X-ray spectroscopy (EDS) line mapping were investigated. The metal nanoparticles are still well exposed to outer surface, being enabled for catalytic activity. The catalytic activity has been evaluated for high temperature CO oxidation reaction. |
| 저자 |
문송이1, 비나익2, 정찬호3, 김선미1, 박정영2
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| 소속 |
1Center for Nanomaterials and Chemical Reactions, 2IBS / Graduate School of EEWS, 3KAIST |
| 키워드 |
Hybrid Nanocatalyst; Metal Oxide; CO oxidation; Nanoparticles
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| E-Mail |
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| 원문파일 |
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