Preparation and characterization of mesoporous carbon-supported Pt nanocatalyst and its stability under strong acidic solutions

被引:7
|
作者
Jung, Yonju
Kim, Seok
Park, Soo-Jin
Kim, Ji Man [1 ]
机构
[1] Sungkyunkwan Univ, Dept Chem, BK21 Sch Chem Mat Sci, Suwon 440746, South Korea
[2] Sungkyunkwan Univ, Adv Inst Nanotechnol, Suwon 440746, South Korea
[3] Inha Univ, Dept Chem, Inchon 402751, South Korea
[4] Korea Res Inst Chem Technol, Adv Mat Div, Taejon 304600, South Korea
[5] Korea Res Inst Chem Technol, Nucl Chem Res Div, Taejon 304600, South Korea
关键词
mesoporous carbons; platinum catalyst; chemical stability; polymer coating;
D O I
10.1016/j.colsurfa.2007.04.088
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Pt/C catalyst was prepared by the formic acid reduction method (FARM) using mesoporous carbon supports with submicron-scale particle size, which was synthesized by the nano-replication technique using mesoporous silica (MSU-H) as templates. The average size of the Pt particles, calculated from the Pt(111) peak by Scherrer equation, was found to be 3.3 nm. The chemical stabilities of PUC catalysts and polymer-coated Pt/C catalysts were examined in distilled water and in strong acidic solutions such as H2SO4 and HCIO4. The release amount of Pt in distilled water was found to be at trace levels (<3 ppb), which is close to the detection limits of ICP-AES. However, the Pt release greatly increased with time in both H2SO4 and HCIO4 solutions and reached a few percent levels in a week. On the other hand, a PVP/PEI-coated Pt/C catalyst showed much better stability that the Pt release was about 0.5% in 3 M HCIO4 for a week, compared with that of a pristine Pt/C catalyst. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:167 / 170
页数:4
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