HYDROGEN CHEMISORPTION ON 3-WAY AUTOMOTIVE CATALYSTS

被引：0

作者：

BOULY, C ^{[1
]}

GASS, JL ^{[1
]}

MARET, D ^{[1
]}

BIANCHI, D ^{[1
]}

机构：

[1] UNIV LYON 1,MAT & PROCEDES CATALYT LAB,43 BD 11 NOVEMBRE 1918,F-69622 VILLEURBANNE,FRANCE

来源：

BULLETIN DE LA SOCIETE CHIMIQUE DE FRANCE | 1993年 / 130卷 / 02期

关键词：

EXHAUST-GAS CATALYST; 3-WAY CATALYST; HYDROGEN CHEMISORPTION; DISPERSION; TEMPERATURE-PROGRAMMED DESORPTION;

D O I：

暂无

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Temperature-programmed desorption (TPD) is used to determine the experimental conditions needed to characterize the dispersion of noble metals by hydrogen chemisorption on three-way exhaust-gas catalysts, It is shown that hydrogen chemisorption is activated on the samples. An adsorption temperature of 100-200-degrees-C must be used in order to obtain fast saturation of the sites. Under these conditions, the noble metal support chemisorbs H-2 as well. Only the TPD method permits the two sites of adsorption to be distinguished. For the various fresh industrial catalysts studied, the metal dispersion is 100% using a ratio H/metal = 1.

引用

页码：192 / 199

页数：8

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