ACID-BASE REACTIONS ON MODEL MGO SURFACES

被引:27
作者
PENG, XD [1 ]
BARTEAU, MA [1 ]
机构
[1] UNIV DELAWARE,CTR CATALYT SCI & TECHNOL,DEPT CHEM ENGN,NEWARK,DE 19716
关键词
ACID-BASE REACTIONS; MGO; CARBOXYLIC ACIDS; ALCOHOLS; FORMALDEHYDE;
D O I
10.1007/BF00767207
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
Three MgO surfaces of different structures have been employed as models for study of the acid-base properties of MgO. Surface spectroscopies including XPS, UPS, and ISS were used to determine the nature and the absolute coverage of surface intermediates, and the nature of bonding sites upon adsorption of Bronsted acid molecules on these surfaces. Different behavior patterns of the Bronsted acid molecules with varying strengths on the three model surfaces provide insights into the site requirements for dissociation of Bronsted acids on MgO. The base-catalyzed Cannizzaro reaction of formaldehyde was observed on these model surfaces under UHV conditions.
引用
收藏
页码:245 / 254
页数:10
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