Significant two-step potential-induced surface reconstruction observed on Au(111) in aqueous sulfuric acid

Autor: Joseph Hamill, Kazem Zhour, Diddo Diddens, Masoud Baghernejad
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Electrochemistry Communications, Vol 140, Iss , Pp 107332- (2022)
Druh dokumentu: article
ISSN: 1388-2481
DOI: 10.1016/j.elecom.2022.107332
Popis: We report in this communication, through in situ STM images correlated with time, and ab initio simulations of binding energies, how potential-induced surface reconstruction is formed on Au(111) single crystal in 0.1 M H2SO4. It was found that while the electrode potential after lifting the reconstructed surface is switched back to a more negative value than the potential of zero charge, the formation process of the reconstructed surface goes through two consecutive routes. In the more kinetically favorable step, and within a few minutes, the reconstructed surface follows three different lattice directions with a high proportion of semi zig-zag structures. However, by maintaining the negative applied potential, the surface reconstruction rearranges to a straighter reconstructed pattern in the second step, which is more energetically favorable.
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