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Alfred Larsson. Portrait.

Alfred Larsson

Postdoctoral fellow

Alfred Larsson. Portrait.

Dynamics of lifting the Au(111) reconstruction in perchloric acid electrolyte

Author

  • Gary S. Harlow
  • Weronica Linpé
  • Sebastian Pfaff
  • Ziyan Yang
  • Leon Jacobse
  • Vedran Vonk
  • Giuseppe Abbondanza
  • Marina Peña-Díaz
  • S. Barja
  • Ann Christin Dippel
  • Olof Gutowski
  • Alfred Larsson
  • Lisa Rämisch
  • Johan Zetterberg
  • Lindsay R. Merte
  • Andreas Stierle
  • Edvin Lundgren
Show all

Summary, in English

The striped p × √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 HClO4electrolyte while the potential is cycled at both 5 mV s−1and 2 mV s−1between 0.06 V and 0.86 V versus RHE. Reciprocal-space maps, collected every ∼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 ≈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−1we 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.

Department/s

  • Synchrotron Radiation Research
  • LU Profile Area: Light and Materials
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • MAX IV Laboratory
  • NanoLund: Centre for Nanoscience
  • Combustion Physics
  • Lund Laser Centre, LLC
  • LTH Profile Area: Photon Science and Technology
  • LTH Profile Area: The Energy Transition

Publishing year

2025-10

Language

English

Pages

25179-25186

Publication/Series

Physical Chemistry Chemical Physics

Volume

27

Issue

46

Document type

Journal article

Publisher

Royal Society of Chemistry

Topic

  • Physical Chemistry (including Surface- and Colloid Chemistry)

Status

Published

ISBN/ISSN/Other

  • ISSN: 1463-9076