Projects per year
Abstract
Video-rate atomic force microscopy (AFM) is used to study the near-surface nanostructure dynamics of the ionic liquid ethylammonium nitrate (EAN) at a highly oriented pyrolytic graphite (HOPG) electrode as a function of potential in real-time for the first time. The effects of varying the surface potential and adding 10 wt% water on the nanostructure diffusion coefficient are probed. For both EAN and the 90 wt% EAN-water mixture, disk-like features ≈9 nm in diameter and 1 nm in height form above the Stern layer at all potentials. The nanostructure diffusion coefficient increases with potential (from OCP −0.5 V to OCP +0.5 V) and with added water. Nanostructure dynamics depends on both the magnitude and direction of the potential change. Upon switching the potential from OCP −0.5 V to OCP +0.5 V, a substantial increase in the diffusion coefficients is observed, likely due to the absence of solvophobic interactions between the nitrate (NO3−) anions and the ethylammonium (EA+) cations in the near-surface region. When the potential is reversed, EA+ is attracted to the Stern layer to replace NO3−, but its movement is hindered by solvophobic attractions. The outcomes will aid applications, including electrochemical devices, catalysts, and lubricants.
Original language | English |
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Article number | 2306011 |
Journal | Small |
Volume | 20 |
Issue number | 7 |
Early online date | 8 Oct 2023 |
DOIs | |
Publication status | Published - 15 Feb 2024 |
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Dive into the research topics of 'Effect of Potential on the Nanostructure Dynamics of Ethylammonium Nitrate at a Graphite Electrode'. Together they form a unique fingerprint.Projects
- 3 Finished
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Nanoscale Dynamics and Structure of SAILs at Electrodes
Atkin, R. (Investigator 01), Silvester-Dean, D. (Investigator 02), Warr, G. (Investigator 03), Costa Gomes, M. (Investigator 04) & Padua, A. (Investigator 05)
ARC Australian Research Council
25/01/21 → 25/03/25
Project: Research
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Quantitative Movies of Nanoscale Dynamics by Video Atomic Force Microscopy
Atkin, R. (Chief Investigator), Swaminatha Iyer, K. (Chief Investigator), Ludwig, M. (Chief Investigator), Parish, G. (Chief Investigator), Smith, N. (Chief Investigator), Poinem, G. (Chief Investigator), Hartley, P. (Chief Investigator) & Parsons, D. (Chief Investigator)
ARC Australian Research Council
1/01/20 → 31/12/20
Project: Research
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Nanostructured Ionic-Molecular Hybrid Liquids
Warr, G. (Investigator 01), Atkin, R. (Investigator 02), Perkin, S. (Investigator 03) & Edlar, K. (Investigator 04)
ARC Australian Research Council
1/01/20 → 31/12/23
Project: Research