An STM investigation of surface diffusion on iodine modified Au(111)

Ordered Anion Adlayers on Metal Electrode Surfaces

“…Similar observations were reported by Dietterle et al. for Ag(111) electrodes in sulfuric acid solution ,, and by McHardy et al and Giesen and Kolb for Au(111) in halide-containing solution. Quantitative analyses ,,− revealed that the influence of disordered anion adlayers on the step dynamics as compared to the bare metal surface under UHV conditions is small for weakly adsorbing anions, such as sulfate, or at low anion surface concentrations, but it can be substantial at higher surface concentrations and even change the dominant mass transport mechanism (for details, see the recent review by Giesen 417 ).…”

Effect of local environment on nanoscale dynamics at electrochemical interfaces: Anisotropic growth and dissolution in the presence of a step providing evidence for a Schwoebel–Ehrlich barrier at solid/liquid interfaces

“…31 However, there has been to our knowledge no report of the effect of steps on the dynamics or resultant surface morphology. While the S-E barrier has been invoked in electrochemistry, 34,35 we are not aware of any previous report of direct evidence, e.g. STM images, revealing an S-E barrier in environments other than UHV.…”

Potential dependence of step and kink energies on Au(100) electrodes in sulfuric acid

“…63 On the other hand, a non-monotonic change in step edge diffusion as a function of the electrode potential was observed by McHardy et al for Au(111) in perchloric acid. 66 These authors could assign changes in the step edge diffusion to phase transitions of the electrode surface structure related to the specific adsorption of electrolyte ions. In the specific case here, we also found that the step free energy depends on whether the specifically adsorbed sulfate ions were disordered or reveal the ordered superstructure recently reported by Kolb and coworkers.…”