Metal particle size effects and metal-support interaction in electrochemically treated Pt/C catalysts investigated by 13C NMR

被引：15

作者：

Han, KS ^{[1
]}

Han, OH

Babu, PK

机构：

[1] Korea Basic Sci Inst, Daegu Ctr, Taegu 702701, South Korea

[2] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2005年 / 152卷 / 12期

关键词：

D O I：

10.1149/1.2077327

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The NMR data obtained after adsorbing (CO)-C-13 on Pt by partial oxidation of (CH3OH)-C-13 showed a nonlinear variation of the chemical shift and the linewidth with decreasing particle size, more change for average sizes less than 5 nm, which can be explained in terms of the variation of relative populations of different CO adsorption sites. There was also a noticeable increase in the chemical shift of CO adsorbed on carbon-supported Pt catalysts as compared to Pt black samples of similar size, which we attribute to a metal-support interaction in the supported catalysts. (c) 2005 The Electrochemical Society. All rights reserved.

引用

页码：J131 / J135

页数：5

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