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Unravelling the electrochemical double layer by direct probing of the solid/liquid interface

Author

Listed:
  • Marco Favaro

    (Advanced Light Source, Lawrence Berkeley National Laboratory
    Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
    Lawrence Berkeley National Laboratory)

  • Beomgyun Jeong

    (Advanced Light Source, Lawrence Berkeley National Laboratory
    Ertl Center for Electrochemistry and Catalysis, School of Environmental Science and Engineering, Gwangju Institute of Science and Technology
    Center for Advanced X-ray Science, Gwangju Institute of Science and Technology)

  • Philip N. Ross

    (Lawrence Berkeley National Laboratory)

  • Junko Yano

    (Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
    Lawrence Berkeley National Laboratory)

  • Zahid Hussain

    (Advanced Light Source, Lawrence Berkeley National Laboratory)

  • Zhi Liu

    (Advanced Light Source, Lawrence Berkeley National Laboratory
    State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences
    School of Physical Science and Technology, ShanghaiTech University)

  • Ethan J. Crumlin

    (Advanced Light Source, Lawrence Berkeley National Laboratory
    Joint Center for Energy Storage Research, Lawrence Berkeley National Laboratory)

Abstract

The electrochemical double layer plays a critical role in electrochemical processes. Whilst there have been many theoretical models predicting structural and electrical organization of the electrochemical double layer, the experimental verification of these models has been challenging due to the limitations of available experimental techniques. The induced potential drop in the electrolyte has never been directly observed and verified experimentally, to the best of our knowledge. In this study, we report the direct probing of the potential drop as well as the potential of zero charge by means of ambient pressure X-ray photoelectron spectroscopy performed under polarization conditions. By analyzing the spectra of the solvent (water) and a spectator neutral molecule with numerical simulations of the electric field, we discern the shape of the electrochemical double layer profile. In addition, we determine how the electrochemical double layer changes as a function of both the electrolyte concentration and applied potential.

Suggested Citation

  • Marco Favaro & Beomgyun Jeong & Philip N. Ross & Junko Yano & Zahid Hussain & Zhi Liu & Ethan J. Crumlin, 2016. "Unravelling the electrochemical double layer by direct probing of the solid/liquid interface," Nature Communications, Nature, vol. 7(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12695
    DOI: 10.1038/ncomms12695
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    Cited by:

    1. Xinxing Peng & Fu-Chun Zhu & You-Hong Jiang & Juan-Juan Sun & Liang-Ping Xiao & Shiyuan Zhou & Karen C. Bustillo & Long-Hui Lin & Jun Cheng & Jian-Feng Li & Hong-Gang Liao & Shi-Gang Sun & Haimei Zhen, 2022. "Identification of a quasi-liquid phase at solid–liquid interface," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Pinar Aydogan Gokturk & Rahul Sujanani & Jin Qian & Ye Wang & Lynn E. Katz & Benny D. Freeman & Ethan J. Crumlin, 2022. "The Donnan potential revealed," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Michael L. Whittaker & David Ren & Colin Ophus & Yugang Zhang & Laura Waller & Benjamin Gilbert & Jillian F. Banfield, 2022. "Ion complexation waves emerge at the curved interfaces of layered minerals," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    4. Ananta Dey & Amal Mendalz & Anna Wach & Robert Bericat Vadell & Vitor R. Silveira & Paul Maurice Leidinger & Thomas Huthwelker & Vitalii Shtender & Zbynek Novotny & Luca Artiglia & Jacinto Sá, 2024. "Hydrogen evolution with hot electrons on a plasmonic-molecular catalyst hybrid system," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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