Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis and Catalytic Characteristics of Thermally Stable TiO2/Pt/SiO2 Hybrid Nanocatalysts

고온에서 안정적인 TiO2/Pt/SiO2 하이브리드 나노촉매의 제작 및 촉매 특성

  • Reddy, A. Satyanarayana (Graduate School of EEWS (WCU) and NanoCentury KI, KAIST (Korea Advanced Institute of Science and Technology)) ;
  • Jung, Chan-Ho (Graduate School of EEWS (WCU) and NanoCentury KI, KAIST (Korea Advanced Institute of Science and Technology)) ;
  • Kim, Sun-Mi (Graduate School of EEWS (WCU) and NanoCentury KI, KAIST (Korea Advanced Institute of Science and Technology)) ;
  • Yun, Jung-Yeul (Korea Institute of Materials Science) ;
  • Park, Jeong-Young (Graduate School of EEWS (WCU) and NanoCentury KI, KAIST (Korea Advanced Institute of Science and Technology))
  • ;
  • 정찬호 (한국과학기술원 EEWS 대학원) ;
  • 김선미 (한국과학기술원 EEWS 대학원) ;
  • 윤중열 (한국기계연구원 부설 재료연구소) ;
  • 박정영 (한국과학기술원 EEWS 대학원)
  • Received : 2011.09.19
  • Accepted : 2011.10.28
  • Published : 2011.12.28
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Abstract

Thermally stable $TiO_2$/Pt/$SiO_2$ core-shell nanocatalyst has been synthesized by chemical processes. Citrated capped Pt nanoparticles were deposited on amine functionalized silica produced by Stober process. Ultrathin layer of titania was coated on Pt/$SiO_2$ for preventing sintering of the metal nanoparticles at high temperatures. Thermal stability of the metal-oxide hybrid catalyst was demonstrated heating the sample up to $600^{\circ}C$ in air and by investigating the morphology and integrity of the structure by transmission electron spectroscopy. The surface analysis of the constituent elements was performed by X-ray photoemission spectroscopy. The catalytic activity of the hybrid catalysts was investigated by CO oxidation reaction with oxygen as a model reaction.

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References

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