The structure and corrosion chemistry of bromine on Pt(111)

被引：15

作者：

Xu, H ^{[1
]}

Yuro, R ^{[1
]}

Harrison, I ^{[1
]}

机构：

[1] Univ Virginia, Dept Chem, Charlottesville, VA 22901 USA

来源：

SURFACE SCIENCE | 1998年 / 411卷 / 03期

关键词：

corrosion; etching; halides; hot atom; Pt(111); scanning tunneling microscopy (STM); surface photochemistry;

D O I：

10.1016/S0039-6028(98)00338-0

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 corrosive adsorption of Pr atoms on Pt(111) was studied by variable temperature STM, TPD and AES. Photoinduced dissociative electron attachment to adsorbed CH3Br at 193 nm was used to dose hot Br anions onto the surface at 90 K. Br formed two ordered structures on Pt(111): (3 x 3) and (root 3 x root 3)R30 degrees. STM images showed that both structures can coexist at intermediate coverage. Photofragmentation of CH3Br produced Pt atom monovacancies on the Pt(111) surface which were attributed to abstractive attack by the hot Pr anions. The initial monovacancy etching efficiency of the adsorbing Pr anions was high, roughly 33%. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：303 / 315

页数：13

共 45 条

[1] DIFFUSION OF SINGLE ADATOMS OF PLATINUM, IRIDIUM AND GOLD ON PLATINUM SURFACES [J].