Influence of platinum on ceria sulfation

被引：57

作者：

Bazin, P

Saur, O

Lavalley, JC

Blanchard, G

Visciglio, V

Touret, O

机构：

[1] UNIV CAEN,ISMRA,URA CNRS 414,CATALYSE & SPECTROCHIM LAB,F-14050 CAEN,FRANCE

[2] RHONE POULENC RECH,CTR RECH,F-93308 AUBERVILLIERS,FRANCE

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1997年 / 13卷 / 3-4期

关键词：

Pt/CeO2; sulfation; sulfate stability; sulfate reducibility; FTIR; thermogravimetry;

D O I：

10.1016/S0926-3373(97)00004-0

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：

The influence of platinum on ceria sulfation has been studied using thermogravimetry and infrared spectroscopy. The same types of sulfate species - surface and bulk-like species - are evidenced with or without Pt. Pt does not modify the thermal stability of both types of sulfate. It favors sulfate formation on low-surface-area CeO2 samples. The reducibility of sulfate by H-2 is promoted by Pt irrespective of the types of sulfate formed on ceria. H2S, which is formed by H-2 reduction of sulfate, partly remains on the catalyst. It is adsorbed not only on the oxide but also on Pt. Sulfur poisoning of Pt has been shown by IR study of CO adsorption. (C) 1997 Elsevier Science B.V.

引用

页码：265 / 274

页数：10

共 20 条

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AN LD, 1990, APPL CATAL, V66, P219

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