Zero kinetic energy electron-induced reaction of formaldehyde on Ag(111) and its significance for surface photochemistry

被引：10

作者：

Fleck, L ^{[1
]}

Kim, JS ^{[1
]}

Dai, HL ^{[1
]}

机构：

[1] UNIV PENN,DEPT CHEM,PHILADELPHIA,PA 19104

来源：

SURFACE SCIENCE | 1996年 / 356卷 / 1-3期

关键词：

electron-solid interactions; formaldehyde; silver(111); surface chemical reaction; surface photochemistry; tunneling;

D O I：

10.1016/0039-6028(96)00668-1

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：

Zero and low kinetic energy electrons were found to induce polymerization of submonolayer formaldehyde on Ag(111). This observation supports the mechanism that formaldehyde photochemistry on the silver surface is induced by photoexcited electrons generated in the substrate. The cross-section measured for the electron-induced polymerization is nearly constant (1+/-0.2x10(-15) cm(2)) over the electron energy range 0-20 eV. From this value, the tunneling efficiency of the photoexcited subvacuum electrons in Ag to formaldehyde on the surface is estimated to be 10(-3).

引用

页码：L417 / L422

页数：6

共 23 条

[1] ELECTRONIC EXCITATIONS OF BENZENE, PYRIDINE, AND PYRAZINE ADSORBED ON AG(111) [J].