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Cited by 589

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The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy

Velasco-Velez, Juan-Jesus, Wu, Cheng Hao, Pascal, Tod A., Wan, Liwen F., Guo, Jinghua, Prendergast, David, Salmeron, Miquel·2014·Science
DOI 10.1126/science.1259437
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Abstract

The molecular structure of the electrical double layer determines the chemistry in all electrochemical processes. Using x-ray absorption spectroscopy (XAS), we probed the structure of water near gold electrodes and its bias dependence. Electron yield XAS detected at the gold electrode revealed that the interfacial water molecules have a different structure from those in the bulk. First principles calculations revealed that ~50% of the molecules lie flat on the surface with saturated hydrogen bonds and another substantial fraction with broken hydrogen bonds that do not contribute to the XAS spectrum because their core-excited states are delocalized by coupling with the gold substrate. At negative bias, the population of flat-lying molecules with broken hydrogen bonds increases, producing a spectrum similar to that of bulk water.

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Metadata

Authors
Velasco-Velez, J.-J., Wu, C. H., Pascal, T. A., Wan, L. F., Guo, J., Prendergast, D., & Salmeron, M.
Venue
Science
Publisher
American Association for the Advancement of Science (AAAS)
Published
2014-11-14
Volume
346
Issue
6211
Pages
831-834
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
DOI
10.1126/science.1259437
OpenAlex
W2092102399
Cited by
589
References
3
FWCI
29.70
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy. https://app.cochat.ai/papers/10.1126/science.1259437
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Velasco-Velez, J.-J., Wu, C. H., Pascal, T. A., Wan, L. F., Guo, J., Prendergast, D., & Salmeron, M. (2014). The structure of interfacial water on gold electrodes studied by x-ray absorption spectroscopy. Science. https://doi.org/10.1126/science.1259437

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