Cited by 120Electrostatics and Colloid InteractionsAdvanced Chemical Physics StudiesElectrocatalysts for Energy Conversion

Assessing a First-Principles Model of an Electrochemical Interface by Comparison with Experiment

Steinmann, Stephan N., Sautet, Philippe·2016·The Journal of Physical Chemistry C

Abstract

Electrified interfaces are central for electrocatalysis, batteries, and molecular electronics. Experimental characterization of these complex interfaces with atomic resolution is highly challenging. First-principles modeling could provide a link between the measurable quantities and an atomic scale understanding. However, such simulations are far from straightforward. Although approaches that include the effect of the potential and the electrolyte have been proposed, detailed validation has been scarce and ”indirect” since atomically resolved experimental studies of systems that can be convincingly simulated are scarce. We introduce here the adsorption of pyridine on Au(111) as a convenient and relevant model: the adsorption mode of pyridine switches as a function of the electrochemical potential. We demonstrate that the primitive surface charging model gives qualitatively correct results at a low complexity. For quantitative agreement, however, the model needs to include a more realistic description of the electrical double layer. Approximating the latter through the linearized Poisson–Boltzmann equation leads to a quantitative improvement, lowering the error in the transition potential from 1 V to an acceptable 0.3 V. Hence, we demonstrate the qualitative usefulness of the surface charging method and the excellent agreement that can be obtained by slightly more sophisticated electrolyte models.

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Crossref · 10.1021/acs.jpcc.6b01938

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Authors
Steinmann, S. N., & Sautet, P.
Affiliations
Lyon 1 Université (FR)
Corresponding author
Sautet, Philippe
Venue
The Journal of Physical Chemistry C
Published
2016-03-07
Volume
120
Issue
10
Pages
5619-5623
ISSN
  • 1932-7447 (ISSN-L)
  • 1932-7455
OpenAlex
W2276671738
Cited by
120
References
41
Citations by year
2026: 7 · 2025: 17 · 2024: 14 · 2023: 11 · 2022: 12 · 2021: 8 · 2020: 19 · 2019: 13 · 2018: 12 · 2017: 4 · 2016: 3
FWCI
7.30
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Physical Chemistry C (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Electrostatics and Colloid Interactions
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Chemical Physics Studies
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Keywords
electrochemical interfaces, first-principles modeling, pyridine adsorption, Au(111), electrochemical potential, electric double layer, linearized Poisson-Boltzmann equation, electrolyte modeling, model validation

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