MONOCRYSTALLINE GOLD-AQUEOUS INTERFACES AS A MODEL EXPERIMENTAL LINK BETWEEN MACROSCOPIC ELECTROCHEMISTRY AND IN-SITU ELECTROCHEMICAL SURFACE SCIENCE

被引:46
作者
GAO, XP [1 ]
EDENS, GJ [1 ]
WEAVER, MJ [1 ]
机构
[1] PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907
来源
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1994年 / 376卷 / 1-2期
基金
美国国家科学基金会;
关键词
D O I
10.1016/0022-0728(94)03538-5
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Comparisons are undertaken between some voltammetric and ac impedance responses of ordered monocrystalline gold electrodes in the presence of adsorbed anions, and the electrode potential-dependent atomic structures and surface phase transitions sensed by in situ scanning tunneling microscopy (STM). Emphasis is placed on facilitating such links between macroscopic and microscopic double-layer phenomena by acquiring individual and/or temporal sequences of so-called ''potentiodynamic'' STM images (PDSTM) during potential sweeps or steps. Two types of double-layer phenomena are considered. The first involves the formation and removal of reconstruction on low-index gold surfaces, chiefly in iodide electrolytes. The marked influence of anion adsorption on the real-space dynamics as well as the thermodynamics of potential-induced reconstruction are discussed in terms of surface bonding and electronic factors. The detailed information on local variations in reconstructed atomic patterns discernable by STM is also briefly described, along with the virtues of PDSTM for unraveling the atomic-level transport mechanisms associated with the potential-induced formation and removal of reconstruction. The other type of phenomenon considered is the formation of ordered anionic adlayers at higher potentials, and the nature of phase transitions that are thereby involved, specifically for iodide, bromide, and sulfate adsorption. The overall synergetic value of coupled electrochemical and probe microscopic measurements for enhancing our atomic-level understanding of double-layer phenomena is pointed out, along with the unique value of ordered gold surfaces for this endeavor.
引用
收藏
页码:21 / 34
页数:14
相关论文
共 48 条
  • [1] THE DEPENDENCE OF THE SURFACE-DIFFUSION COEFFICIENTS OF GOLD ATOMS ON THE POTENTIAL - ITS INFLUENCE ON RECONSTRUCTION OF METAL LATTICES
    DONA, JM
    GONZALEZVELASCO, J
    [J]. SURFACE SCIENCE, 1992, 274 (02) : 205 - 214
  • [2] EDENS GJ, UNPUB
  • [3] EDENS GJ, IN PRESS SURF SCI
  • [4] EDENS GJ, IN PRESS J ELECTROAN
  • [5] ORDERED STRUCTURES AND STRUCTURAL TRANSFORMATIONS ON A K-COVERED AU(110) SURFACE
    FLYNNSANDERS, DK
    JAMISON, KD
    BARTH, JV
    WINTTERLIN, J
    THIEL, PA
    ERTL, G
    BEHM, RJ
    [J]. SURFACE SCIENCE, 1991, 253 (1-3) : 270 - 282
  • [6] AN INSITU STUDY OF RECONSTRUCTED GOLD ELECTRODE SURFACES BY 2ND HARMONIC-GENERATION
    FRIEDRICH, A
    PETTINGER, B
    KOLB, DM
    LUPKE, G
    STEINHOFF, R
    MAROWSKY, G
    [J]. CHEMICAL PHYSICS LETTERS, 1989, 163 (2-3) : 123 - 128
  • [7] FRUMKIN AN, 1980, COMPR TREAT, pCH5
  • [8] EXTERNAL-CHARGE-INDUCED SURFACE RECONSTRUCTION ON AG(110)
    FU, CL
    HO, KM
    [J]. PHYSICAL REVIEW LETTERS, 1989, 63 (15) : 1617 - 1620
  • [9] METAL ADSORBATE VIBRATIONAL FREQUENCIES AS A PROBE OF SURFACE BONDING - HALIDES AND PSEUDOHALIDES AT GOLD ELECTRODES
    GAO, P
    WEAVER, MJ
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (17) : 4057 - 4063
  • [10] GAO X, 1993, BER BUNSENGES PHYS C, V97