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Polymer pencil leads as a porous nanocomposite graphite material for electrochemical applications: The impact of chemical and thermal treatments

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00121332" target="_blank" >RIV/00216224:14310/21:00121332 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216305:26620/21:PU140944

  • Result on the web

    <a href="https://www.sciencedirect.com/science/article/pii/S1388248121001028" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1388248121001028</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.elecom.2021.107018" target="_blank" >10.1016/j.elecom.2021.107018</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Polymer pencil leads as a porous nanocomposite graphite material for electrochemical applications: The impact of chemical and thermal treatments

  • Original language description

    Pencil graphite electrodes are a simple, disposable, and low-cost alternative to screen-printed graphite electrodes. In terms of stability and sensitivity, pencil electrodes often outperform conventional carbon ones. This paper discusses and emphasizes the superior properties of polymer pencil graphite electrodes (pPeGEs), which can be exploited in the electrochemical analysis of molecules, such as chlorides, whose signals are missing on common graphite electrodes. The chemical and structural behaviour of pencil leads after exposure to acids (HF, HNO3, HClO4) or organic solvents (CH3CN, CH3Cl) was monitored via X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The electrochemical activity of pristine and treated pPeGEs was studied by the cyclic voltammetry (CV) responses of reversible redox probes [Fe(CN)6]3-/4- and [Ru(NH3)6]3+/2+. XPS proved the presence of siloxanes in the surface matrix of the pencil leads; this finding relates to the hydrophobic surface character of the electrodes. SEM then provided images of the pencil surfaces with microplates and flakes and revealed the removal of siloxanes upon chemical treatment. The CVs of non-dried and dried pPeGEs displayed surface changes in the polymer matrix, accompanied by water loss. Our study shows that the pPeGE retains the character of a stable graphite sensor when exposed to acids and organic solvents, except for HF and chloroform. The discovered effects explain the electrochemical processes occurring on pPeGEs and can contribute to their application in electrochemical sensing and energy storage.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10406 - Analytical chemistry

Result continuities

  • Project

    <a href="/en/project/LM2018127" target="_blank" >LM2018127: Czech Infrastructure for Integrative Structural Biology</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Electrochemistry Communications

  • ISSN

    1388-2481

  • e-ISSN

    1873-1902

  • Volume of the periodical

    126

  • Issue of the periodical within the volume

    May

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    7

  • Pages from-to

    „107018“

  • UT code for WoS article

    000646982700001

  • EID of the result in the Scopus database

    2-s2.0-85105321069