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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Catalytic activity of Au/TiO2 and Pt/TiO2 nanocatalysts prepared with arc plasma deposition under CO oxidation

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Title
Catalytic activity of Au/TiO2 and Pt/TiO2 nanocatalysts prepared with arc plasma deposition under CO oxidation
Author(s)
Sang Hoon Kim; Chan-Ho Jung; Nruparaj Sahu; Dahee Park; Jung Yeul Yun; Heonphil Ha; Jeong Young Park
Publication Date
2013-03
Journal
APPLIED CATALYSIS A-GENERAL, v.454, no., pp.53 - 58
Publisher
ELSEVIER SCIENCE BV
Abstract
We report the catalytic activity of Au/TiO2 and Pt/TiO2 nanocatalysts under CO oxidation fabricated by arc plasma deposition (APD), which is a facile dry process involving no organic materials. Using APD, the catalyst nanoparticles were well dispersed on the TiO2 powder with an average particle size of 2–4 nm, well below that of nanoparticles prepared by the sol–gel method (10 nm). We found that the average particle size of the dispersed gold nanoparticles can be controlled by changing the plasma discharge voltage of APD. Accordingly, the amount of gold loaded on the TiO2 powder increased as the discharge voltage increased, but the specific surface area of the Au/TiO2 samples decreased. As for catalytic reactivity, Au/TiO2 showed a higher catalytic activity than Pt/TiO2 in CO oxidation. The catalytic activity of the Au/TiO2 samples showed size dependence where higher catalytic activity occurred on smaller gold nanoparticles. This study suggests that APD is a simple way to fabricate catalytically active nanocatalysts.
URI
https://pr.ibs.re.kr/handle/8788114/1369
ISSN
0926-860X
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
1_IBS CA1201_Applied catalysis_454_53_Catalytic activity of Au_TiO2.pdfDownload

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