The influence of modifying additions of La and Ce oxides on electronic state of surface atoms and ions of supported copper

被引：16

作者：

Pestryakov, AN ^{[1
]}

Davydov, AA ^{[1
]}

机构：

[1] BORESKOV INST CATALYSIS,NOVOSIBIRSK 630090,RUSSIA

来源：

APPLIED SURFACE SCIENCE | 1996年 / 103卷 / 04期

关键词：

D O I：

10.1016/S0169-4332(96)00533-8

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 electronic state of surface of supported copper in modified copper catalysts has been tested by the methods of LR-spectroscopy of adsorbed CO, X-ray diffraction analysis and electron microscopy. The modifying additions of cerium oxide stabilize the ionic state of copper, while lanthanum oxide decreases the effective charge of Cu+ ions. The observed effects are caused by variation in metal dispersivity in the modified samples and by electron donor-acceptor interaction of the surface atoms and ions of copper with the modifier.

引用

页码：479 / 483

页数：5

共 15 条

[1]

Davydov A. A., 1990, INFRARED SPECTROSCOP

[2]

DAVYDOV AA, 1985, KINET CATAL, V20, P157

[3] CHEMICAL AND PHYSICAL-PROPERTIES OF COPPER-BASED CATALYSTS FOR CO SHIFT REACTION AND METHANOL SYNTHESIS [J].