Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran Analytical and Bioanalytical Electrochemistry - 17 8 2025 08 31 Beyond Randles-Sevcik Formalism: Towards Understanding Peak Currents of Nernstian Redox Systems in Square-Wave Voltammetry 646 661 733508 10.22034/abec.2025.733508 EN Milkica Janeva Faculty of Medical Sciences, Goce Delcev University, Stip, Macedonia Pavlinka Kokoskarova Faculty of Medical Sciences, Goce Delcev University, Stip, Macedonia Rubin Gulaboski Faculty of Medical Sciences, Goce Delcev University, Stip, Macedonia Journal Article 2025 07 07 <span style="font-size: 12.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; color: black; mso-themecolor: text1; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">In redox systems that obey the Nernst equation, where the surface and bulk concentrations remain in equilibrium during the potential sweep, the Randles-Sevcik equation is seen as a standard tool in both fundamental and applied linear scan voltammetry. As the Randles-Sevcik equation is seen as a key theoretical framework for interpreting voltammetric behavior in electrochemically reversible and diffusion-controlled redox systems considered under conditions of linear scan voltammetry, this foundational relationship becomes inapplicable when extended to pulse voltammetric techniques. Pulse voltammetric techniques differ fundamentally from linear scan voltammetric methods in both potential modulation and in current measurement protocols. The form of applied bias in pulse voltammetric techniques leads to conditions in which each applied pulse disrupts the diffusion profile of redox species of interest. Repeated disruption and compression of diffusion profiles in pulse voltammetric techniques introduce significant complexity into the current-potential behavior of redox species, thereby precluding the direct application of the Randles-Sevcik formalism. This study presents some basic theoretical insights into the limitations of applying Randles–Sevcik-type equations to square-wave voltammetry. In addition, a unifying parameter has been identified that governs the peak current response in square-wave voltammetry, which integrates the effects of potential step, frequency, square-wave amplitude, and temperature. At constant magnitude of the diffusion coefficient, this critical parameter is defined as χ = constant · (F/RT)·[Esw/(dE·f)]1/2 and it is seen as a foundation for developing more comprehensive models and analytical expressions describing peak current dependencies under square-wave voltammetric conditions.

https://www.abechem.com/article_733508_b3a191fdcdd78588b69b5f80a195930c.pdf

Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran Analytical and Bioanalytical Electrochemistry - 17 8 2025 08 31 Hydrothermal Green Synthesis of rGO Incorporated with TiO2-NiO-MnO2 Nanocomposite for Sensor Materials 662 676 733509 10.22034/abec.2026.733509 EN Diah Febryana Magister Student, Study Program of Chemistry Science, Post Graduate School, Universitas Halu Oleo, Kendari 93232- Southeast Sulawesi, Indonesia Maulidiyah Maulidiyah Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Jl. H.E.A. Mokodompit Kampus Baru Anduonohu, Kendari 93232 – Southeast Sulawesi, Indonesia 0000-0001-5643-9854 Zul Arham Department of Mathematics and Natural Sciences, Institute Agama Islam Negeri (IAIN), Kendari, Southeast Sulawesi 93563, Indonesia Research Center of Nickel and Nano Energy, Institut Agama Islam Negeri (IAIN), Kendari, Southeast Sulawesi 93116, Indonesia 0000-0001-6644-8674 Muhammad Zakir Muzakkar Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Jl. H.E.A. Mokodompit Kampus Baru Anduonohu, Kendari 93232 – Southeast Sulawesi, Indonesia 0000-0002-9749-0637 Alimin Alimin Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Jl. H.E.A. Mokodompit Kampus Baru Anduonohu, Kendari 93232 – Southeast Sulawesi, Indonesia Muhammad Nurdin Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Jl. H.E.A. Mokodompit Kampus Baru Anduonohu, Kendari 93232 – Southeast Sulawesi, Indonesia 0000-0002-6727-9283 Irwan Irwan Department of Pharmacy, Faculty of Sciences and Technology, Institut Teknologi dan Kesehatan Avicenna, Kendari 93117, Southeast Sulawesi, Indonesia Fharaz Jhanizza Department of Mathematics and Natural Sciences, Institute Agama Islam Negeri (IAIN), Kendari, Southeast Sulawesi 93563, Indonesia Fadil Arham Research Center of Nickel and Nano Energy, Institut Agama Islam Negeri (IAIN), Kendari, Southeast Sulawesi 93116, Indonesia Journal Article 2025 07 16 In this study, a novel voltammetric sensor for the detection of bisphenol A (BPA) was developed using a reduced graphene oxide (rGO) electrode incorporated with a TiO2-NiO-MnO2 nanocomposite (rGO/TNM). The TNM nanocomposite was synthesized via a hydrothermal method, and its integration with rGO improved the sensor’s electrochemical performance by enhancing conductivity, surface area, and active sites. Characterization of the TNM nanocomposite using X-ray diffraction (XRD) confirmed the formation of distinct anatase TiO2, γ-MnO2, and NiO phases, each contributing to the synergistic enhancement of electrocatalytic properties. Fourier-transform infrared (FTIR) spectroscopy indicated the presence of characteristic metal-oxygen bonds, validating the successful formation of the TNM nanocomposite. Scanning electron microscopy (SEM) revealed a highly uniform and porous morphology with well-dispersed nanoparticles, ideal for maximizing electron transfer. Elemental analysis through energy-dispersive X-ray (EDX) spectroscopy further confirmed the purity and composition of the nanocomposite. Under optimal conditions, the linear range of the rGO/TNM electrode by CV measurement was from 0.1 μg.L-1 to 1.0 μg.L-1, with a sensitivity and limit of detection (LOD) at 0.01094 µg.L-1. These results make the developed sensor a promising candidate for environmental monitoring of BPA and highlight the potential of nanocomposite-modified electrodes in advancing electrochemical sensor technology.

https://www.abechem.com/article_733509_22b2a3b5afe888c1456355fbae584868.pdf

Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran Analytical and Bioanalytical Electrochemistry - 17 8 2025 08 01 Design and Electrochemical Evaluation of Cu/Cu₂O–SGr–Bi₂S₃ Nanohybrids for Enhancing CO₂ Electroreduction 677 695 733510 10.22034/abec.2025.733510 EN Ahmad Rouhollahi Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, 15418-49611, Tehran, Iran 0000-0002-6050-4011 Maral Fouladvand Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, 15418-49611, Tehran, Iran Elaheh Bakhshi Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, 15418-49611, Tehran, Iran Journal Article 2025 08 28 <span lang="EN-GB" style="mso-ascii-font-family: 'Times New Roman'; mso-ascii-theme-font: major-bidi; mso-hansi-font-family: 'Times New Roman'; mso-hansi-theme-font: major-bidi; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi; color: black; mso-ansi-language: EN-GB;">The electrochemical conversion of carbon dioxide (CO₂) represents a promising strategy for reducing greenhouse gas emissions and facilitating sustainable chemical production. Here, we present a rationally engineered copper foam electrode integrated with a multifunctional nanohybrid comprising copper oxide (Cu₂O), bismuth sulfide (Bi₂S₃), and sulfur-doped graphene (SGr–Bi₂S₃). The Cu/Cu₂O–SGr–Bi₂S₃ composite leverages synergistic electronic and catalytic interfaces, resulting in outstanding electrocatalytic performance for CO₂ reduction. Comprehensive physicochemical and electrochemical analyses, including cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy, demonstrate that the hybrid electrodes deliver significantly higher cathodic current densities and exhibit markedly reduced charge transfer resistance under CO₂-saturated conditions compared to unmodified copper counterparts. The nanoscale distribution of Bi₂S₃ effectively increases the density of active catalytic sites, while strong electronic coupling at the heterointerfaces suppresses the competing hydrogen evolution reaction<span dir="RTL" lang="AR-SA" style="mso-ascii-font-family: 'Times New Roman'; mso-ascii-theme-font: major-bidi; mso-hansi-font-family: 'Times New Roman'; mso-hansi-theme-font: major-bidi; color: black; mso-ansi-language: EN-GB;">.<span lang="AR-SA" style="mso-ascii-font-family: 'Times New Roman'; mso-ascii-theme-font: major-bidi; mso-hansi-font-family: 'Times New Roman'; mso-hansi-theme-font: major-bidi; color: black; mso-ansi-language: EN-GB;"> <span lang="EN-GB" style="mso-ascii-font-family: 'Times New Roman'; mso-ascii-theme-font: major-bidi; mso-hansi-font-family: 'Times New Roman'; mso-hansi-theme-font: major-bidi; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi; color: black; mso-ansi-language: EN-GB;">As a result, the Cu/Cu₂O–SGr–Bi₂S₃ nanohybrids achieve superior activity, enhanced current densities, and excellent operational stability, outperforming conventional copper-based electrodes. These results position the Cu/Cu₂O–SGr–Bi₂S₃ nanohybrids as highly efficient, scalable, and economically viable electrocatalysts for next-generation CO₂ reduction technologies.

https://www.abechem.com/article_733510_36f3a8da686b16cfb2a9ba3464c724aa.pdf

https://www.abechem.com/article_733513_fb4435e6283d24fa49049cad7cdeec28.pdf

https://www.abechem.com/article_733516_399fb8a8546ac5a96dd04113d8799e10.pdf

Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran Analytical and Bioanalytical Electrochemistry - 17 8 2025 08 01 Awareness and Knowledge of Celiac Disease and the Role of Nanotechnology and Electrochemical Methods in Gluten Detection 747 770 733519 10.22034/abec.2026.733519 EN Rana H. Raheema Department of Microbiology, Wasit University, College of Medicine, Iraq 0000-0002-1994-0508 Taif Kareem Khalaf Department of Gynecology & Obstetrics, Wasit University, College of Medicine, Iraq Roaa M. H. Shoker Biology Department, Wasit University, Science Collage, Iraq Qassim Dawood Yasir Department of Pediatric, Wasit University, College of Medicine, Iraq Journal Article 2025 08 14 <span style="mso-ascii-font-family: 'Times New Roman'; mso-ascii-theme-font: major-bidi; mso-hansi-font-family: 'Times New Roman'; mso-hansi-theme-font: major-bidi; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: major-bidi;">Celiac disease (CD), a chronic autoimmune disorder triggered by gluten ingestion in genetically predisposed individuals, continues to pose diagnostic and management challenges worldwide due to its diverse clinical presentations and often subtle symptomatology. Although public awareness of CD has increased alongside the expanding gluten-free food market, significant knowledge gaps persist regarding the disease's underlying immunopathology, comorbidities, and lifelong dietary implications. As accurate and timely diagnosis remains critical to prevent long-term complications, conventional serological assays and biopsies, while effective, are limited by invasiveness, resource dependency, and processing delays. In response, electrochemical biosensing platforms—leveraging nanotechnology, aptamer design, and microfluidic integration—have emerged as promising alternatives, enabling rapid, sensitive, and cost-effective detection of key gluten-related biomarkers such as anti-tTG and deamidated gliadin peptide antibodies. These innovations harness the advantages of nanostructured materials, label-free detection, and real-time signal acquisition to offer portable, minimally invasive solutions for clinical and food safety applications. Despite the complexity of transitioning from laboratory prototypes to commercially viable diagnostic tools, interdisciplinary advancements in sensor engineering, material science, and data analytics continue to refine the specificity, stability, and usability of these platforms. This review synthesizes current findings on public perception of CD, highlights diagnostic challenges, and explores the transformative potential of electrochemical and nanomaterial-enabled biosensors in achieving early detection, personalized monitoring, and improved quality of life for individuals affected by gluten-related disorders.

https://www.abechem.com/article_733519_6521857094d507ebb6047d38c92c8c5a.pdf