Dynamics of lifting the Au(111) reconstruction in perchloric acid electrolyte
Journal article, 2025
The striped p x root 3 reconstruction of Au(111) is a textbook example of how electrode surfaces reorganise in response to an applied potential. Using in situ high-energy surface X-ray diffraction, we track the surface reconstruction in 0.1 M HClO4 electrolyte while the potential is cycled at both 5 mV s-1 and 2 mV s-1 between 0.06 V and 0.86 V versus RHE. Reciprocal-space maps, collected every similar to 10 s, show that the unit cell of the well-known herringbone reconstruction increases in length progressively as the potential is swept positively; the diffraction spots coalesce with the spot from the (111) surface and the reconstruction lifts completely above approximate to 0.7 V. The lifting and reformation dynamics of the surface reconstruction are seen to be relatively slow and continuous, when the potential is swept at 5 mV s-1 we observe the reconstruction lifting at more positive potentials than when swept at 2 mV s-1. Conversely the reforming of the reconstruction is also slow and is present at more positive potentials when the sweep rate is slower.
Author
Gary S. Harlow
Lund University
University of Oregon
University of the Basque Country (UPV/EHU)
Weronica Linpe
Lund University
Sebastian Pfaff
Lund University
Ziyan Yang
University of Oregon
University of the Basque Country (UPV/EHU)
Leon Jacobse
Max Planck Society
Deutsches Elektronen-Synchrotron (DESY)
Vedran Vonk
Deutsches Elektronen-Synchrotron (DESY)
Giuseppe Abbondanza
Chalmers, Physics, Chemical Physics
Marina Pena-Diaz
University of Oregon
University of the Basque Country (UPV/EHU)
Basque Research and Technology Alliance (BRTA)
S. Barja
University of the Basque Country (UPV/EHU)
University of Oregon
Ann-Christin Dippel
Deutsches Elektronen-Synchrotron (DESY)
Olof Gutowski
Deutsches Elektronen-Synchrotron (DESY)
Alfred Larsson
Lund University
Lisa Ramisch
Lund University
Johan Zetterberg
Lund University
Lindsay R. Merte
Malmö university
Andreas Stierle
Deutsches Elektronen-Synchrotron (DESY)
Edvin Lundgren
Lund University
Physical Chemistry Chemical Physics
1463-9076 (ISSN) 1463-9084 (eISSN)
Vol. 27 25179-25186 25179In situ högenergetisk röntgendiffraktion från elektrokemiska material
Swedish Research Council (VR) (2015-06092), 2016-01-01 -- 2019-12-31.
Subject Categories (SSIF 2025)
Inorganic Chemistry
DOI
10.1039/d5cp03380b
PubMed
41236359