Oxygen storage capacity (OSC) of aged Pt/CeO2/Al2O3 catalysts: roles of Pt and CeO2 supported on Al2O3

被引：40

作者：

Kakuta, N ^{[1
]}

Morishima, N ^{[1
]}

Kotobuki, M ^{[1
]}

Iwase, T ^{[1
]}

Mizushima, T ^{[1
]}

Sato, Y ^{[1
]}

Matsuura, S ^{[1
]}

机构：

[1] CATALAR IND CO,SHIZUOKA 43714,JAPAN

来源：

APPLIED SURFACE SCIENCE | 1997年 / 121卷

关键词：

oxygen storage capacity; OSC; cerium oxide; Pt; heterogeneous catalyst;

D O I：

10.1016/S0169-4332(97)00346-2

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：

In order to investigate the behavior of Pt and CeO2 on the Pt/CeO2/Al2O3 catalyst after aging at 1273 K, the oxygen storage capacity(OSC) has been measured and physically mixed catalysts such as Pt/Al2O3 + CeO2,/Al2O3, Pt/Al2O3 + CeO2, Pt/CeO2 + Al2O3 and Pt/CeO2 + Pt/Al2O3 catalysts have been employed for comparison. After the aging, the OSC of the physically mixed catalysts whose CeO2 was not supported on Al2O3 became poor because of the large-sized CeO2 and the deactivation of Pt, although those catalysts provided large OSC assisted by the Pt-CeO2 interaction before the aging, The OSC increment calculated by subtraction of the OSC of Pt/Al2O3 + CeO2/Al2O3 from that of Pt/CeO2/Al2O3 indicated that both the Pt-CeO2 interaction and the dispersed CeO2 on Al2O3 are essential for the generation of OSC, even after the aging. (C) 1997 Elsevier Science B.V.

引用

页码：408 / 412

页数：5

共 8 条

[1] RAMAN-SPECTROSCOPIC STUDY OF THE PT-CEO(2) INTERACTION IN THE PT AL2O3-CEO2 CATALYST [J].