Surface Protolysis and Its Kinetics Impact the Electrical Double Layer

Journal article (2022)

Authors

M.F. Döpke Complex Fluid Processing - Mechanical, Maritime and Materials Engineering
Benoit Coasne Université Grenoble Alpes
Remco Hartkamp Complex Fluid Processing - Mechanical, Maritime and Materials Engineering
Research Group
Complex Fluid Processing (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 M.F. Döpke, Fenna Westerbaan van der Meij, Benoit Coasne, Remco Hartkamp
DOI: https://doi.org/10.1103/PhysRevLett.128.056001
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Published Date

2022

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Complex Fluid Processing

Abstract

Surface conductivity in the electrical double layer (EDL) is known to be affected by proton hopping and diffusion at solid-liquid interfaces. Yet, the role of surface protolysis and its kinetics on the thermodynamic and transport properties of the EDL are usually ignored as physical models consider static surfaces. Here, using a novel molecular dynamics method mimicking surface protolysis, we unveil the impact of such chemical events on the system’s response. Protolysis is found to strongly affect the EDL and electrokinetic aspects with major changes in Formula Presented potential and electro-osmotic flow.

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