ACID-BASE PROPERTIES OF MGO STUDIED BY HIGH-RESOLUTION ELECTRON-ENERGY LOSS SPECTROSCOPY

被引：46

作者：

WU, MC ^{[1
]}

GOODMAN, DW ^{[1
]}

机构：

[1] TEXAS A&M UNIV SYST,DEPT CHEM,COLL STN,TX 77843

来源：

CATALYSIS LETTERS | 1992年 / 15卷 / 1-2期

关键词：

MAGNESIUM OXIDE; ACID BASE; HIGH RESOLUTION; ELECTRON ENERGY LOSS SPECTROSCOPY;

D O I：

10.1007/BF00770893

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 acid/base properties of model MgO surfaces have been studied using various probe molecules with acid strengths ranging from those of carboxylic acids and alcohols to alkenes and alkanes. High-resolution electron energy-loss spectroscopy (HREELS) data show that carboxylic acids, methanol and water dissociate heterolytically on MgO surfaces. Ethylene and ethane, however, are found to adsorb associatively. Thermally generated surface defect sites exhibit stronger basic character and are capable of dissociating ethane. The present studies demonstrate the capabilities of HREELS for the investigation of the chemical properties of insulating materials.

引用

页码：1 / 11

页数：11