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Interfacial electrochemistry of graphitic carbon nitride nanosheet and polymelamine nanofilm: Toward integrated sensing and energy platforms.

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Title: Interfacial electrochemistry of graphitic carbon nitride nanosheet and polymelamine nanofilm: Toward integrated sensing and energy platforms.
Authors: Mathur, Neha1 (AUTHOR), Pachar, Kiran1 (AUTHOR), Ankita1 (AUTHOR), Yadav, Amit1 (AUTHOR), Roy, Partha1 (AUTHOR) partharoy@curaj.ac.in, Gupta, Pankaj1 (AUTHOR) pankaj.gupta@curaj.ac.in
Source: Electrochimica Acta. Nov2025, Vol. 539, pN.PAG-N.PAG. 1p.
Subjects: Electrochemistry, Electrocatalysts, Energy infrastructure, Hydrogen evolution reactions, Oxidation-reduction reaction, Signal detection, Polymers
Abstract: In response to the growing demand for metal-free catalytic electrode materials, this study explores the electrochemical behavior of graphitic carbon nitride nanosheets (g-C₃N₄ NS) and an electrochemically synthesized polymelamine (PMEL) nanofilm. Comprehensive characterization using X-ray diffraction, X-ray photoelectron spectroscopy, UV-Vis, and FTIR spectroscopy confirms the successful synthesis of g-C₃N₄ NS. Field-emission scanning electron microscopy verifies the uniform deposition of g-C₃N₄ NS and PMEL onto glassy carbon electrodes (GCE), producing modified electrodes: GCE/g-C₃N₄ NS, GCE/PMEL, and GCE/PMEL-g-C₃N₄ NS. Electrochemical studies using cyclic voltammetry and electrochemical impedance spectroscopy with a standard redox probe show that the PMEL-modified electrode has a significantly larger electrochemically active surface area and lower charge transfer resistance than its g-C₃N₄ counterpart, indicating improved electron transfer kinetics. Notably, GCE/PMEL exhibits superior redox activity and electrocatalytic performance for dopamine oxidation and hydrogen peroxide (H₂O₂) reduction, as demonstrated by square wave voltammetry and chronoamperometry. These techniques also reveal faster response times and higher sensitivity for PMEL in detecting both analytes. In the hydrogen evolution reaction (HER), GCE/PMEL shows a lower overpotential (630 mV) compared to GCE/g-C₃N₄ NS (661 mV) at 1 mA cm-2, underscoring PMEL's potential as a highly effective metal-free electrocatalyst. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 187748316
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  Label: Title
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  Data: Interfacial electrochemistry of graphitic carbon nitride nanosheet and polymelamine nanofilm: Toward integrated sensing and energy platforms.
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  Data: <searchLink fieldCode="AR" term="%22Mathur%2C+Neha%22">Mathur, Neha</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pachar%2C+Kiran%22">Pachar, Kiran</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ankita%22">Ankita</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yadav%2C+Amit%22">Yadav, Amit</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Roy%2C+Partha%22">Roy, Partha</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> partharoy@curaj.ac.in</i><br /><searchLink fieldCode="AR" term="%22Gupta%2C+Pankaj%22">Gupta, Pankaj</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> pankaj.gupta@curaj.ac.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Electrochimica+Acta%22">Electrochimica Acta</searchLink>. Nov2025, Vol. 539, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Electrochemistry%22">Electrochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Electrocatalysts%22">Electrocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+infrastructure%22">Energy infrastructure</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation-reduction+reaction%22">Oxidation-reduction reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Signal+detection%22">Signal detection</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink>
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  Data: In response to the growing demand for metal-free catalytic electrode materials, this study explores the electrochemical behavior of graphitic carbon nitride nanosheets (g-C₃N₄ NS) and an electrochemically synthesized polymelamine (PMEL) nanofilm. Comprehensive characterization using X-ray diffraction, X-ray photoelectron spectroscopy, UV-Vis, and FTIR spectroscopy confirms the successful synthesis of g-C₃N₄ NS. Field-emission scanning electron microscopy verifies the uniform deposition of g-C₃N₄ NS and PMEL onto glassy carbon electrodes (GCE), producing modified electrodes: GCE/g-C₃N₄ NS, GCE/PMEL, and GCE/PMEL-g-C₃N₄ NS. Electrochemical studies using cyclic voltammetry and electrochemical impedance spectroscopy with a standard redox probe show that the PMEL-modified electrode has a significantly larger electrochemically active surface area and lower charge transfer resistance than its g-C₃N₄ counterpart, indicating improved electron transfer kinetics. Notably, GCE/PMEL exhibits superior redox activity and electrocatalytic performance for dopamine oxidation and hydrogen peroxide (H₂O₂) reduction, as demonstrated by square wave voltammetry and chronoamperometry. These techniques also reveal faster response times and higher sensitivity for PMEL in detecting both analytes. In the hydrogen evolution reaction (HER), GCE/PMEL shows a lower overpotential (630 mV) compared to GCE/g-C₃N₄ NS (661 mV) at 1 mA cm-2, underscoring PMEL's potential as a highly effective metal-free electrocatalyst. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.electacta.2025.147131
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Electrochemistry
        Type: general
      – SubjectFull: Electrocatalysts
        Type: general
      – SubjectFull: Energy infrastructure
        Type: general
      – SubjectFull: Hydrogen evolution reactions
        Type: general
      – SubjectFull: Oxidation-reduction reaction
        Type: general
      – SubjectFull: Signal detection
        Type: general
      – SubjectFull: Polymers
        Type: general
    Titles:
      – TitleFull: Interfacial electrochemistry of graphitic carbon nitride nanosheet and polymelamine nanofilm: Toward integrated sensing and energy platforms.
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            NameFull: Mathur, Neha
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            NameFull: Pachar, Kiran
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            – D: 01
              M: 11
              Text: Nov2025
              Type: published
              Y: 2025
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              Value: 539
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