Spectroelectrochemical Studies of CTAB Adsorbed on Gold Surfaces in Perchloric Acid

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/131875
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Title: Spectroelectrochemical Studies of CTAB Adsorbed on Gold Surfaces in Perchloric Acid
Authors: Gisbert-González, José M. | Briega-Martos, Valentín | Vidal-Iglesias, Francisco J. | Cuesta, Angel | Feliu, Juan M. | Herrero, Enrique
Research Group/s: Electroquímica de Superficies
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Spectroelectrochemical methods | CTAB adsorbed | Gold surfaces | Perchloric acid
Issue Date: 8-Feb-2023
Publisher: American Chemical Society
Citation: Langmuir. 2023, 39(7): 2761-2770. https://doi.org/10.1021/acs.langmuir.2c03226
Abstract: The behaviour of CTAB adsorbed on polycrystalline gold electrodes has been studied using a combination of spectroelectrochemical methods. The results indicate that the formation of the layer is the consequence of the precipitation of the CTAB micelles on the electrode surface as bromide ions, which stabilize the micelles, are replaced by perchlorate anions. This process leads to the formation of CTA+ layers in which perchlorate ions are intercalated, in which the adlayer suffers a continuous rearrangement that leads to the formation of micro-dominions of different types of hydrogen-bonded water populations throughout the adlayer. After prolonged cycling, a stable situation is reached. Under these conditions, water molecules permeate through the adlayer toward the electrode surface at potentials positive of the potential of zero charge, due to the repulsion between the CTA+ layer and the positive charge of the electrode.
Sponsor: This research was funded by Ministerio de Ciencia e Innovación (Spain) grant number PID2019-105653GB-I00), Generalitat Valenciana (Spain) grant number PROMETEO/2020/063. A.C. gratefully acknowledges the support of the University of Aberdeen.
URI: http://hdl.handle.net/10045/131875
ISSN: 0743-7463 (Print) | 1520-5827 (Online)
DOI: 10.1021/acs.langmuir.2c03226
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2023 The Authors. Published by American Chemical Society. Creative Commons Attribution 4.0 International License (CC BY 4.0)
Peer Review: si
Publisher version: https://doi.org/10.1021/acs.langmuir.2c03226
Appears in Collections:INV - EQSUP - Artículos de Revistas

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