Volume 14, Issue 3 (12-2024)
مهندسی خوردگی 2024, 14(3): 62-62 |
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Yari Sisi N, Hosseini M G. Investigating the Effect of Organic Addition of Polyvinyl Pyrrolidine on the Electrocatalytic Properties of Electrodes with Fixed Dimensions (DSA). مهندسی خوردگی 2024; 14 (3) :62-62
URL: http://journal.ica.ir/article-1-232-en.html
URL: http://journal.ica.ir/article-1-232-en.html
Professor, Electrochemistry Research Laboratory, Department of Physical Chemistry Faculty of Chemistry, University of Tabriz & Professor, Electrochemistry Research Laboratory, Department of Physical Chemistry Faculty of Chemistry, University of Tabriz
Abstract: (30 Views)
Dimensionally Stable Anodes (DSA) are used in various industries, including cathodic protection and
chlor-alkali.
The synthesis of the ternary coatings, comprising IrO₂-Ta₂O₅-SiO₂ without an organic additive and with
polyvinyl pyrrolidine as the organic additive, was conducted in two stages. Initially, a sol-gel solution
was prepared, followed by a thermal treatment at 450°C on a titanium substrate. The surface
morphology of the two electrodes was examined using scanning electron microscopy (SEM) and
energy-dispersive X-ray spectroscopy (EDX) imaging techniques. This study aimed to investigate the
stability of two electrodes as anodes in a 1 M H₂SO₄ solution at room temperature and under a current
intensity of 1.5 A/cm², with observations made at different time points. The results demonstrated that
the IrO₂-Ta₂O₅-SiO₂ electrode comprising PVP organic additives (h171) exhibited superior longevity
and stability when compared with the electrode lacking an organic additive (h139). The electrochemical
activity of the desired coatings was evaluated in terms of oxygen evolution reaction using
electrochemical methods, including cyclic voltammetry (CV) and impedance spectroscopy (EIS), for
the stability test. The findings indicated that the addition of PVP to the coatings increased the number
of iridium oxide active sites, which functioned as the primary active species and catalyst. The addition
of the PVP additive to the electrode has facilitated the penetration of the electrolyte into the coating,
resulting in an increase in the voltammetric charge to 109.8 mC/cm².
chlor-alkali.
The synthesis of the ternary coatings, comprising IrO₂-Ta₂O₅-SiO₂ without an organic additive and with
polyvinyl pyrrolidine as the organic additive, was conducted in two stages. Initially, a sol-gel solution
was prepared, followed by a thermal treatment at 450°C on a titanium substrate. The surface
morphology of the two electrodes was examined using scanning electron microscopy (SEM) and
energy-dispersive X-ray spectroscopy (EDX) imaging techniques. This study aimed to investigate the
stability of two electrodes as anodes in a 1 M H₂SO₄ solution at room temperature and under a current
intensity of 1.5 A/cm², with observations made at different time points. The results demonstrated that
the IrO₂-Ta₂O₅-SiO₂ electrode comprising PVP organic additives (h171) exhibited superior longevity
and stability when compared with the electrode lacking an organic additive (h139). The electrochemical
activity of the desired coatings was evaluated in terms of oxygen evolution reaction using
electrochemical methods, including cyclic voltammetry (CV) and impedance spectroscopy (EIS), for
the stability test. The findings indicated that the addition of PVP to the coatings increased the number
of iridium oxide active sites, which functioned as the primary active species and catalyst. The addition
of the PVP additive to the electrode has facilitated the penetration of the electrolyte into the coating,
resulting in an increase in the voltammetric charge to 109.8 mC/cm².
Type of Study: Research |
Subject:
General
Received: 2025/08/13 | Accepted: 2024/12/15 | Published: 2024/12/15
Received: 2025/08/13 | Accepted: 2024/12/15 | Published: 2024/12/15
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