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
收藏
页码：192 / 199
页数：8
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