Percentage of metal exposed on commercial three-way catalysts

被引：20

作者：

Salin, L

Potvin, C

Tempere, JF

Boudart, M

Djega-Mariadassou, G

Bart, JM

机构：

[1] Univ Paris 06, Lab React Surface, CNRS, URA 1106, F-75252 Paris 05, France

[2] PSA Peugeot Citroen, DOGN, CGMP, CED, F-92252 La Garenne Colombes, France

[3] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1998年 / 37卷 / 12期

关键词：

D O I：

10.1021/ie980421d

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A new sensitive method has been developed to determine the percentage of metal exposed (% ME) in commercial three-way bimetallic catalysts, fresh and aged. The method is based on the measurement of specific rates of two structure insensitive reactions: the hydrogenation of benzene and propene. Values of % ME were obtained for each metal at the surface of Pt-Ph and Pd-Rh catalysts with very low % ME. The % ME and the corresponding catalytic activity of the samples in the postcombustion follow the same trend as a result of aging.

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页码：4531 / 4535

页数：5

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