TY - JOUR
T1 - Spectroelectrochemical studies of CTAB adsorbed on gold surfaces in perchloric acid
AU - Gisbert González, José
AU - Briega Martos, Valentin
AU - Vidal Iglesias,, Francisco
AU - Cuesta Ciscar, Angel
AU - Feliu, Juan
AU - Herrero, Enrique
N1 - Acknowledgments.
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.
PY - 2023/2/21
Y1 - 2023/2/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85147812436&partnerID=8YFLogxK
U2 - 10.1021/acs.langmuir.2c03226
DO - 10.1021/acs.langmuir.2c03226
M3 - Article
VL - 39
SP - 2761
EP - 2770
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 7
ER -