Journal Article

FZJ-2023-00898

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Significant two-step potential-induced surface reconstruction observed on Au(1 1 1) in aqueous sulfuric acid

Hamill, J. ; Zhour, K. ; Diddens, D.FZJ* ; Baghernejad, M. (Corresponding author)

2022
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/34064  doi:10.1016/j.elecom.2022.107332

Abstract: 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(1 1 1) 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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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 1221 - Fundamentals and Materials (POF4-122) (POF4-122)
2. Elektrolytformulierungen für Lithiumbatterien der nächsten Generation mit großer Energiedichte und hoher Beständigkeit (13XP5129) (13XP5129)

Appears in the scientific report 2023

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