New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene Nanomaterials
Abstract The efficient transfer of electrons between the electrode and the analyte, influenced by electrode polarization (EP), is a crucial yet often overlooked factor in assessing the performance of electrochemical systems. This study explores the use of chitosan as an EP suppressor for graphene ox...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-04-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202400780 |
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| author | Lyndon Naidoo Gloria Ebube Uwaya Krishna Bisetty |
| author_facet | Lyndon Naidoo Gloria Ebube Uwaya Krishna Bisetty |
| author_sort | Lyndon Naidoo |
| collection | DOAJ |
| description | Abstract The efficient transfer of electrons between the electrode and the analyte, influenced by electrode polarization (EP), is a crucial yet often overlooked factor in assessing the performance of electrochemical systems. This study explores the use of chitosan as an EP suppressor for graphene oxide (GO) and reduced graphene oxide (RGO) in a ferri/ferro cyanide redox probe, using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The CV results indicate that GO has greater pseudocapacitance than RGO does, indicating a greater abundance of oxygen‐containing functional groups that facilitate stronger interfacial interactions with chitosan. By reducing the capacitive current, as shown through EIS, the sensitivity toward the Fe2+/3+ redox couple at the electrode double layer is enhanced. These findings align with density functional theory (DFT) calculations, which indicate a charge distortion favoring chitosan, thereby allowing more efficient intrinsic electron transfer within the aromatic rings of the GO/RGO graphene nanomaterials. This research holds significant potential for advancing the development of more efficient sensors and energy storage devices. |
| format | Article |
| id | doaj-art-adbae9e3678f4e8bae2e5d81c4a6a1a4 |
| institution | OA Journals |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj-art-adbae9e3678f4e8bae2e5d81c4a6a1a42025-08-20T02:27:18ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-04-01128n/an/a10.1002/admi.202400780New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene NanomaterialsLyndon Naidoo0Gloria Ebube Uwaya1Krishna Bisetty2Department of Chemistry Durban University of Technology P.O. Box 1334 Durban 4000 South AfricaDepartment of Chemistry Durban University of Technology P.O. Box 1334 Durban 4000 South AfricaDepartment of Chemistry Durban University of Technology P.O. Box 1334 Durban 4000 South AfricaAbstract The efficient transfer of electrons between the electrode and the analyte, influenced by electrode polarization (EP), is a crucial yet often overlooked factor in assessing the performance of electrochemical systems. This study explores the use of chitosan as an EP suppressor for graphene oxide (GO) and reduced graphene oxide (RGO) in a ferri/ferro cyanide redox probe, using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The CV results indicate that GO has greater pseudocapacitance than RGO does, indicating a greater abundance of oxygen‐containing functional groups that facilitate stronger interfacial interactions with chitosan. By reducing the capacitive current, as shown through EIS, the sensitivity toward the Fe2+/3+ redox couple at the electrode double layer is enhanced. These findings align with density functional theory (DFT) calculations, which indicate a charge distortion favoring chitosan, thereby allowing more efficient intrinsic electron transfer within the aromatic rings of the GO/RGO graphene nanomaterials. This research holds significant potential for advancing the development of more efficient sensors and energy storage devices.https://doi.org/10.1002/admi.202400780chitosancyclic voltammetryelectrochemical impedance spectroscopyelectrode polarizationgraphene nanomaterials |
| spellingShingle | Lyndon Naidoo Gloria Ebube Uwaya Krishna Bisetty New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene Nanomaterials Advanced Materials Interfaces chitosan cyclic voltammetry electrochemical impedance spectroscopy electrode polarization graphene nanomaterials |
| title | New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene Nanomaterials |
| title_full | New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene Nanomaterials |
| title_fullStr | New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene Nanomaterials |
| title_full_unstemmed | New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene Nanomaterials |
| title_short | New Insights Into the Effects of Electrode Polarization of Chitosan on Graphene Nanomaterials |
| title_sort | new insights into the effects of electrode polarization of chitosan on graphene nanomaterials |
| topic | chitosan cyclic voltammetry electrochemical impedance spectroscopy electrode polarization graphene nanomaterials |
| url | https://doi.org/10.1002/admi.202400780 |
| work_keys_str_mv | AT lyndonnaidoo newinsightsintotheeffectsofelectrodepolarizationofchitosanongraphenenanomaterials AT gloriaebubeuwaya newinsightsintotheeffectsofelectrodepolarizationofchitosanongraphenenanomaterials AT krishnabisetty newinsightsintotheeffectsofelectrodepolarizationofchitosanongraphenenanomaterials |