Proceedings of the Korean Vacuum Society Conference (한국진공학회:학술대회논문집)
- 2012.02a
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- Pages.245-245
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- 2012
Catalytic Activity of Au/$TiO_2$ and Pt/$TiO_2$ Nanocatalysts Synthesized by Arc Plasma Deposition
- Jung, Chan-Ho (Graduate School of EEWS (WCU) and Nanocentury KI, KAIST) ;
- Kim, Sang-Hoon (Interfacial Engineering Center, KIST) ;
- Reddy, A.S. (Graduate School of EEWS (WCU) and Nanocentury KI, KAIST) ;
- Ha, H. (Interfacial Engineering Center, KIST) ;
- Park, Jeong-Y. (Graduate School of EEWS (WCU) and Nanocentury KI, KAIST)
- Published : 2012.02.08
Abstract
Syntheses of oxide supported metal catalysts by wet-chemical routes have been well known for their use in heterogeneous catalysis. However, uniform deposition of metal nanoparticles with controlled size and shape on the support with high reproducibility is still a challenge for catalyst preparation. Among various synthesis methods, arc plasma deposition (APD) of metal nanoparticles or thin films on oxide supports has received great interest recently, due to its high reproducibility and large-scale production, and used for their application in catalysis. In this work, Au and Pt nanoparticles with size of 1-2 nm have been deposited on titania powder by APD. The size of metal nanoparticles was controlled by number of shots of metal deposition and APD conditions. These catalytic materials were characterized by x-ray diffraction (XRD), inductively coupled plasma (ICP-AES), CO-chemisorption and transmission electron microscopy (TEM). Catalytic activity of the materials was measured by CO oxidation using oxygen, as a model reaction, in a micro-flow reactor at atmospheric pressure. We found that Au/