Following adsorption kinetics at electrolyte/metal interfaces through crystal truncation scattering: sulfur on Au(111).
Combining electrochemical methods, in situ scanning tunneling microscopy, and surface x-ray diffraction allowed study of the structure and kinetics of S/Au(111) electrodes in aqueous electrolytes under potential control. Integrated intensities of a particular crystal truncation rod at anti-Bragg conditions were used to trace the sulfur adsorption and desorption as a function of electrode potential in real time. The S desorption is a first order process and the adsorption follows a Langmuir isotherm. A weakly bound S layer is found on the surface before charge transfer, and then specific adsorption occurs.
Vericat
C
C
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), (CIC-CONICET-UNLP), La Plata, Argentina.
Vela
M E
ME
Andreasen
G A
GA
Salvarezza
R C
RC
Borgatti
F
F
Felici
R
R
Lee
T-L
TL
Renner
F
F
Zegenhagen
J
J
Martín-Gago
J A
JA