Article
Chemistry, Analytical
Ghadeer A. R. Y. Suaifan, Mohammad F. Khanfar, Mayadah B. Shehadeh, Asmaa Alnajajrah, Raghad Abuhamdan, Sameer Ahmad Hasan
Summary: This study successfully developed an electroanalytical electrode for the detection of albendazole (ABZ) active ingredient in pharmaceutical dosage form and contaminated animal-derived products. The modified electrode demonstrated high sensitivity and applicability, making it suitable for quality control in the pharmaceutical and food industry.
Article
Chemistry, Analytical
Haotian Chen, Enno Katelhon, Richard G. Compton
Summary: Physics-informed neural networks are applied to model the mass transport in rotating disk electrodes (RDEs), which are widely used in electroanalysis. The accuracy of the PINN approach is verified quantitatively through 1D simulations, showing comparable results with finite difference simulations and analytical equations under the Levich approximation for cyclic voltammetry and chronoamperometry. Moreover, the PINN approach allows for consideration of smaller Schmidt numbers and reveals the edge effect in RDEs due to nonuniform accessibility and radial diffusion. This extended theory demonstrates that PINNs can serve as an easier and more powerful substitute for conventional methods in analyzing RDEs.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Milivoj Lovric
Summary: Theoretical single scan staircase voltammograms of homogeneous electrocatalytic reactions on the rotating disk electrode were calculated by digital simulation. A simple relationship between steady state current and dimensionless kinetic parameter was discovered, and the influence of the backward component of chemical reaction was demonstrated.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Sarbjeet Kaur, Shalini, Bilal Ahmad Shiekh, Vipan Kumar, Inderpreet Kaur
Summary: A new compound TNFC was synthesized and confirmed by various experimental methods, and then successfully applied as a receptor for Cu2+ in differential pulse voltammetric and potentiometric sensors for quantification.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Physical
Vito Di Noto, Enrico Negro, Angeloclaudio Nale, Gioele Pagot, Keti Vezzu, Plamen Atanassov
Summary: The study examined how to maximize the potential of CV-TF-R(R)DE in studying the most relevant features of oxygen reduction reaction electrocatalysts and quickly identify the most promising candidates.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Chemistry, Analytical
Sutthima Sriprasertsuk, Simone C. Mathias, John R. Varcoe, Carol Crean
Summary: PPy.SDS-coated carbon fiber electrodes demonstrated enhanced drug sensing capabilities compared to bare carbon fibers, with a 14-fold increase in electrochemical surface area. The use of a large counter anion as dopant, such as dodecyl sulfate, resulted in a greater drug sensing response. Differential pulse voltammetry (DPV) with PPy.SDS fiber electrodes was able to detect paracetamol with a detection limit of 34 μM and a linear response range of 50-500 μM, even in the presence of interferents like dopamine and ascorbic acid at 100 μM concentrations. This indicates the potential for real-world applications of PPy.SDS electrodes in drug sensing, with the ability to detect anti-psychotic medication like clozapine at low concentrations.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Rukaya Banu, B. E. Kumara Swamy, Eno Ebenso
Summary: This study presents a simplified and efficient method for quantifying serotonin and epinephrine using a customised glassy carbon electrode. The developed sensor effectively accelerates the electrocatalytic current response and shows good selectivity and sensitivity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Milivoj Lovric
Summary: A model of cyclic staircase voltammetry of enzymatic reactions on the rotating disk electrode is developed, with an investigation into the inhibition by the product. The study found that responses are mostly time-dependent current-potential curves, with maxima in the forward but not in the backward branch. If the maxima appear in both branches, the inhibition is potential-dependent either directly or indirectly.
Article
Chemistry, Physical
Edgardo Maximiliano Gavilan-Arriazu, Sergio A. Rodriguez
Summary: This study investigated and analyzed the oxidation mechanism of the natural pigment betanidin in depth, using computational techniques and experimental data. A complete mechanism model was proposed based on the analysis of density functional theory and simulations of cyclic voltammetry. The dimerization of oxidation products was also considered.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Analytical
Meng-Ke Zhang, Wei Chen, Mian-Le Xu, Zhen Wei, Da Zhou, Jun Cai, Yan-Xia Chen
Summary: This study investigated the effect of buffer pairs on the pH shift at the electrode/electrolyte interface during electrochemical reactions in solutions of different bulk pHs. It established a quantitative relationship between pH(b), pH(b), pK(a), buffer pair concentration, and reaction current density, providing diagrams for estimating pH(s) and ΔpH, as well as guidelines for choosing appropriate buffer pairs to mitigate pH(s) shift induced by electrode reactions.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Yuliang Zhao, Hongyu Zhang, Yang Li, Xiaoai Wang, Liang Zhao, Jianghong Xu, Zhikun Zhan, Guanglie Zhang, Wen Jung Li
Summary: An electrochemical HbA1c sensor with high sensitivity and good specificity is proposed, which is based on the electrochemical immune principle. The sensor's properties were characterized and analyzed, and the experimental results demonstrated its satisfactory performance in terms of detection limit, sensitivity, repeatability, stability, and anti-interference capabilities.
Article
Polymer Science
Rudolf Kiefer, Daniel Georg Weis, Bharath Kumar Velmurugan, Tarmo Tamm, Gerald Urban
Summary: In this study, the ion transport and effects of high synthesis potential on conductive polymer actuators are investigated, revealing the impact of synthesis potential on the activity and structure of the actuator. EQCM analysis allows for the determination of appropriate potential windows for increased control over devices.
Article
Chemistry, Analytical
Iulia Gabriela David, Alexandra-Gabriela Oancea, Mihaela Buleandra, Dana Elena Popa, Emilia Elena Iorgulescu, Adela Magdalena Ciobanu
Summary: Diosmin is a naturally occurring flavonoid that can be quantified through a disposable pencil graphite electrode. The oxidative process involves two irreversible steps.
Article
Materials Science, Multidisciplinary
Mehrshad Bornaei, Habibollah Khajehsharifi, Saeed Shahrokhian, Omid Sheydaei, Ali Zarnegarian
Summary: In this study, metal-organic frameworks (MOFs) MIL-101(Cr) and nanoparticles were synthesized using the hydrothermal method. The resulting MOF exhibited high porosity and activity centers, leading to excellent electrochemical performance. A fabricated electrochemical sensor based on the MOF displayed good responses for detecting kynurenic acid (KYNA). The sensor showed reversible current responses for KYNA, while the bare electrode had no responses.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Zanlin Chen, Haiming Li, Miaojia Xie, Fengguang Zhao, Shuangyan Han
Summary: This study presents a label-free aptamer biosensor based on gold nanoparticles/multi-walled carbon nanotubes @ titanium dioxide (AuNPs/MWCNTs@TiO2) for sensitive detection of malachite green (MG). The nanocomposite provides a large surface area and good electrical conductivity, facilitating aptamer immobilization. The detection is achieved by measuring the change in electrical signal resulting from the detachment of aptamer from complementary chain (cDNA) and binding to MG. Under optimal conditions, the sensor demonstrates good linearity and a low limit of detection (LOD).
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Analytical
Ioana Adina Oancea, Jacobus (Koos) Frederick van Staden, Elena Oancea, Eleonora-Mihaela Ungureanu
ANALYTICAL LETTERS
(2019)
Article
Chemistry, Analytical
George-Octavian Buica, Anton Alexandru Ivanov, Ioana-Georgiana Lazar, Georgiana-Luiza Tatu (Arnold), Cristian Omocea, Liviu Birzan, Eleonora-Mihaela Ungureanu
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2019)
Article
Chemistry, Applied
Eleonora-Mihaela Ungureanu, Marian-Laurentiu Tatu, Emilian Georgescu, Cristian Boscornea, Marcel-Mirel Popa, Gabriela Stanciu
Article
Electrochemistry
George-Octavian Buica, Andrei Bogdan Stoian, Claudiu Manole, Ioana Demetrescu, Cristian Pirvu
ELECTROCHEMISTRY COMMUNICATIONS
(2020)
Article
Chemistry, Analytical
Matei D. Raicopol, Nicoleta Aurelia Chira, Andreea M. Pandele, Anamaria Hanganu, Alexandru Anton Ivanov, Victorita Tecuceanu, Ioana Georgiana Bugean, George-Octavian Buica
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Correction
Chemistry, Analytical
Matei D. Raicopol, Nicoleta Aurelia Chira, Andreea M. Pandele, Anamaria Hanganu, Alexandru Anton Ivanov, Victorita Tecuceanu, Ioana Georgiana Bugean, George-Octavian Buica
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Multidisciplinary Sciences
Eleonora-Mihaela Ungureanu, Mariana Popescu (Apostoiu), Georgiana-Luiza Tatu (Arnold), Liviu Birzan, Raluca Isopescu, Gabriela Stanciu, George-Octavian Buica
Summary: The electrochemical characterization of three (Z)-5-(azulen-1-ylmethylene)-2-thioxo-thiazolidin-4-ones was conducted to investigate their potential application as complexing ligands for heavy metal ions. The redox potential was found to be influenced by the alkyl groups, and a possible oxidation mechanism was proposed. The compounds were immobilized on glassy carbon electrodes and tested for their ability to complex heavy metal ions through adsorptive stripping voltammetry.
Article
Chemistry, Multidisciplinary
Manuela Elena Voicu, Ioana Demetrescu, Andrei Dorobantu, Marius Enachescu, George-Octavian Buica, Daniela Ionita
Summary: A modified biodegradable magnesium alloy with polylactic acid nanofibers was obtained using the electrospinning technique, and the presence of PLA nanofibers was confirmed through various characterization methods. The research indicates that the Mg alloy coated with PLA exhibits reduced hydrogen evolution and improved corrosion resistance, showing a shift towards hydrophobic character.
Article
Chemistry, Analytical
Anda-Gabriela Tenea, Cristina Dinu, George-Octavian Buica, Gabriela-Geanina Vasile
Summary: This paper validates an electrochemical procedure for on-site determination of Hg2+ ions in wastewater samples using a modified carbon screen-printed electrode with a complexing polymeric film. The electrode shows a linear range of 20 μg/L to 150 μg/L, with a LOD of 6 μg/L, LOQ of 20 μg/L, and an average measurement uncertainty of 26% for mercury ions. Comparison with atomic absorption spectrometry method indicates excellent recovery yields.
Article
Multidisciplinary Sciences
Ovidiu-Teodor Matica, Cornelia Musina (Borsaru), Alina Giorgiana Brotea, Eleonora-Mihaela Ungureanu, Mihaela Cristea, Raluca Isopescu, George-Octavian Buica, Alexandru C. Razus
Summary: Rhodanine is a heterocycle with complexing properties for heavy metal ions. The electrochemical characterization of R1 and R2 revealed their similar electron-donating nature. Chemically modified electrodes based on R1 and R2 were used for heavy metal recognition, and it was found that R1 was more sensitive for Pb(II) detection while R2 had a higher absorption coefficient for optical measurements.
Article
Chemistry, Analytical
Cristian Pirvu, Gabriela Stanciu, George-Octavian Buica
Summary: The influence of UV light irradiation on the metal ion open-circuit accumulation process was investigated using a glassy carbon modified electrode with polyL. The study found that photo-assisted metal ion open circuit accumulation enabled the simultaneous detection of Cu(II) and Hg(II), with low detection limits of 0.4 nM and 0.7 nM, respectively.
Article
Electrochemistry
Elena Diacu, Adinuta Paun, Veronica Anastasoaie, Georgiana-Luiza Arnold-Tatu, Liviu Birzan, Eleonora-Mihaela Ungureanu
JOURNAL OF ELECTROCHEMICAL SCIENCE AND ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Alexandru C. Razus, Liviu Birzan, Mihaela Cristea, Victorita Tecuceanu, Constantin Draghici, Anamaria Hanganu, Maria Maganu, Lucia Pintilie, Eleonora Mihaela Ungureanu
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)