SUPPORT EFFECTS ON ELECTRONIC-STRUCTURE OF PLATINUM CLUSTERS IN Y-ZEOLITE

被引：113

作者：

SAMANT, MG

BOUDART, M

机构：

[1] Department of Chemical Engineering, Stanford University, Stanford

[2] IBM Almaden Research Center, San Jose, CA 95120

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 10期

关键词：

D O I：

10.1021/j100163a034

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 structure of platinum clusters of identical size and structure supported in Y zeolites with different acidities was probed by chemisorption, Fourier transform infrared spectroscopy, and X-ray absorption near-edge spectroscopy (XANES). The results indicate increase in ionization potential of Pt as the acidity of zeolites is increased. The XANES data show that the adsorption of hydrogen on the clusters increases the area under the white line at the Pt L(III) absorption edge, indicating the appearance of unoccupied antibonding states above the Fermi level.

引用

页码：4070 / 4074

页数：5

共 27 条

[1] HYDROGEN-OXYGEN TITRATION METHOD FOR MEASUREMENT OF SUPPORTED PLATINUM SURFACE AREAS [J].