Stability of underpotentially deposited Ag layers on a Au(111) surface studied by surface X-ray scattering

被引：21

作者：

Kondo, Toshihiro ^{[3
]}

Takakusagi, Satoru ^{[1
]}

Uosaki, Kohei ^{[1
,2
]}

机构：

[1] Hokkaido Univ, Grad Sch Sci, Phys Chem Lab, Div Chem, Sapporo, Hokkaido 0600810, Japan

[2] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton Satellite MANA, Sapporo, Hokkaido 0600810, Japan

[3] Ochanomizu Univ, Grad Sch Humanities & Sci, Div Sci, Bunkyo Ku, Tokyo 1128610, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 04期

关键词：

Underpotential deposition (upd); Surface X-ray scattering (SXS); Ag on Au(111); SCANNING-TUNNELING-MICROSCOPY; IN-SITU; ELECTRODE SURFACE; ALKANETHIOLATE MONOLAYERS; SILVER DEPOSITION; PHASE-TRANSITIONS; AU(100) SURFACES; EPITAXIAL-GROWTH; INITIAL-STAGES; ACID-SOLUTION;

D O I：

10.1016/j.elecom.2009.01.036

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Stability of underpotentially deposited (upd) Ag layers on Au(111) surface was investigated by surface X-ray scattering (SXS). While the complete pseudomorphic Ag bilayer on Au(111) surface obtained by upd at 10 mV (vs. Ag/Ag+) was maintained its structure even after the circuit was disconnected and the surface was exposed to ambient atmosphere, the pseudomorphic Ag monolayer obtained by upd at 50 mV was converted to a partial bilayer with the coverage of 0.66 and 0.46 ML for the 1st and 2nd layer, respectively. These results show that Ag bilayer is structurally more stable than Ag monolayer on Au(111) and Ag atoms of the upd monolayer move around on the Au(111) surface without potential control. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：804 / 807

页数：4

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