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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Catalytic activity of Pt/SiO2 nanocatalysts synthesized via ultrasonic spray pyrolysis process under CO oxidation

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Title
Catalytic activity of Pt/SiO2 nanocatalysts synthesized via ultrasonic spray pyrolysis process under CO oxidation
Author(s)
Chan-Ho Jung; Yun, Jaecheol; Kamran Qadir; Brundabana Naik; Yun, Jung-Yeul; Jeong Young Park
Publication Date
2014-07
Journal
APPLIED CATALYSIS B-ENVIRONMENTAL, v.154, no., pp.171 -
Publisher
ELSEVIER SCIENCE BV
Abstract
We report the catalytic activity of Pt/SiO2 nanocatalysts synthesized via the ultrasonic spray pyrolysis (USP) process under CO oxidation. We found that the average particle size of the dispersed platinum nanoparticles can be controlled by changing the concentration of the Pt precursor and the calcination conditions. The amount of loaded platinum on the SiO2 powder increased as the precursor concentration increased, while the specific surface area of the Pt/SiO2 samples decreased. As the calcination temperature and time increased, the size of the platinum particles on the SiO2 increased. As for catalytic reactivity, high loading of Pt/SiO2 showed a higher conversion of CO. The turnover rate of the Pt/SiO2 catalysts increased after calcination at 600 degrees C, then decreased after calcination at 750 degrees C, mainly due to agglomeration at the high temperature and partly because of severe oxidation. The catalytic activity of the Pt/SiO2 nanocatalysts synthesized using LISP exhibited higher catalytic activity compared with Pt/SiO2 synthesized via wet chemical synthesis or wetness impregnation. It is attributed to better dispersion of the nanoparticles on the SiO2 as well as the removal of hydrocarbon impurities during calcination. This work demonstrated the successful use of the spray pyrolysis process for synth
URI
https://pr.ibs.re.kr/handle/8788114/979
ISSN
0926-3373
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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