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Surface orientation-dependent electro-oxidation of a polycrystalline gold electrode

Ti, Auden LU orcid ; Sjö, Hanna LU ; Grespi, Andrea LU orcid ; Lira, Estephania LU ; Larsson, Alfred LU orcid ; Küst, Ulrike LU orcid ; Berschauer, Claire LU orcid ; Gustafson, Johan LU ; Merte, Lindsay R. LU and Knudsen, Jan LU orcid , et al. (2026) In Faraday Discussions
Abstract

The activity and stability of an electrocatalyst is governed by the structural and chemical changes occurring at the solid–liquid interface. While single crystal electrodes have often served as model systems to elucidate structure–function relationships, extending these insights to more realistic polycrystalline electrodes requires experimental techniques with spatial resolution that can operate under electrochemical conditions. Herein, the electro-oxidation of a polycrystalline gold electrode is investigated in situ using two-dimensional surface optical reflectance, electrochemical near ambient pressure X-ray photoelectron spectroscopy, and tomographic surface X-ray diffraction. This combination of techniques provides surface-sensitive... (More)

The activity and stability of an electrocatalyst is governed by the structural and chemical changes occurring at the solid–liquid interface. While single crystal electrodes have often served as model systems to elucidate structure–function relationships, extending these insights to more realistic polycrystalline electrodes requires experimental techniques with spatial resolution that can operate under electrochemical conditions. Herein, the electro-oxidation of a polycrystalline gold electrode is investigated in situ using two-dimensional surface optical reflectance, electrochemical near ambient pressure X-ray photoelectron spectroscopy, and tomographic surface X-ray diffraction. This combination of techniques provides surface-sensitive chemical and structural information. In the case of the polycrystalline gold, a surface orientation-dependent oxidation behaviour is found where both the onset and growth of oxides/hydroxides are affected. Our approach provides an enhanced understanding of the dynamic behaviour of complex electrodes under harsh environments, enabling grain-resolved insight into electrochemical processes.

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organization
publishing date
type
Contribution to journal
publication status
epub
subject
in
Faraday Discussions
publisher
Royal Society of Chemistry
external identifiers
  • pmid:42065506
  • scopus:105037674977
ISSN
1359-6640
DOI
10.1039/d5fd00129c
language
English
LU publication?
yes
additional info
Publisher Copyright: This journal is © The Royal Society of Chemistry, 2026.
id
118f9b44-5b87-464f-9635-3f784caac984
date added to LUP
2026-05-13 10:49:20
date last changed
2026-05-19 11:01:23
@article{118f9b44-5b87-464f-9635-3f784caac984,
  abstract     = {{<p>The activity and stability of an electrocatalyst is governed by the structural and chemical changes occurring at the solid–liquid interface. While single crystal electrodes have often served as model systems to elucidate structure–function relationships, extending these insights to more realistic polycrystalline electrodes requires experimental techniques with spatial resolution that can operate under electrochemical conditions. Herein, the electro-oxidation of a polycrystalline gold electrode is investigated in situ using two-dimensional surface optical reflectance, electrochemical near ambient pressure X-ray photoelectron spectroscopy, and tomographic surface X-ray diffraction. This combination of techniques provides surface-sensitive chemical and structural information. In the case of the polycrystalline gold, a surface orientation-dependent oxidation behaviour is found where both the onset and growth of oxides/hydroxides are affected. Our approach provides an enhanced understanding of the dynamic behaviour of complex electrodes under harsh environments, enabling grain-resolved insight into electrochemical processes.</p>}},
  author       = {{Ti, Auden and Sjö, Hanna and Grespi, Andrea and Lira, Estephania and Larsson, Alfred and Küst, Ulrike and Berschauer, Claire and Gustafson, Johan and Merte, Lindsay R. and Knudsen, Jan and Lundgren, Edvin}},
  issn         = {{1359-6640}},
  language     = {{eng}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Faraday Discussions}},
  title        = {{Surface orientation-dependent electro-oxidation of a polycrystalline gold electrode}},
  url          = {{http://dx.doi.org/10.1039/d5fd00129c}},
  doi          = {{10.1039/d5fd00129c}},
  year         = {{2026}},
}