Article
Chemistry, Multidisciplinary
Iasmin B. Silva, Danyelle Medeiros de Araujo, Marco Vocciante, Sergio Ferro, Carlos A. Martinez-Huitle, Elisama V. Dos Santos
Summary: This study developed a cork-modified carbon paste electrode for the determination of Pb(II) in aqueous solutions, showing high sensitivity and accuracy under SWASV conditions. By optimizing the operating conditions and conducting selectivity analysis, the electrode was successfully applied for the determination of Pb(II) in natural water samples.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Analytical
Luiz Carlos Domingos Batista, Thiago Izidoro Silva Santos, Jose E. Lima Santos, Djalma Ribeiro da Silva, Carlos A. Martinez-Huitle
Summary: MOF-235, as an orange powder with octahedral crystals, has been explored as an electrochemical sensor for organic compounds. Modification of graphite electrodes with MOF-235 (10%) showed significant improvement in current response for detecting catechol, demonstrating potential application in real water samples.
Article
Chemistry, Multidisciplinary
Kejia Zhang, Decheng Li, Jie Shao, Yu Jiang, Linze Lv, Qiang Shi, Qunting Qu, Honghe Zheng
Summary: This study offers an in situ electrochemistry-driven approach to create a bifunctional interphase by implanting diethylenetriaminepenta(methylene-phosphonic acid) (DTPMP) on the surface of graphite particles. The DTPMP-derived interphase not only enhances the antioxidative stability of electrolytes but also facilitates the desolvation of PF6- anions, leading to the protection of the graphitic structure and enabling fast-charge and ultralong cycling performance in dual-ion batteries (DIBs).
Article
Chemistry, Analytical
Natalia Festinger, Adrianna Lemiesz, Ewelina Skowron, Sylwia Smarzewska, Witold Ciesielski
Summary: A sensitive SWV method based on BPPGE and EPPGE was developed to determine the concentration of MAN in spiked samples, showing linear responses over specified concentration ranges. The method was successful in determining MAN with good recovery rates, and CV was used to understand the electrode process mechanism of MAN.
Article
Chemistry, Analytical
Natalia Festinger, Sylwia Smarzewska, Valentin Mirceski, Witold Ciesielski
Summary: A simple and sensitive square wave voltammetric procedure was developed for the determination of acemetacin (ACM) at graphite flake paste electrode (GFPE) and glassy carbon electrode (GCE). The method showed wide linear range for ACM concentration and was successfully applied for ACM determination in pharmaceuticals and spiked urine with satisfying recoveries. The electrochemical oxidation of ACM was found to be an irreversible process controlled by mixed nature of the mass transfer process.
Article
Chemistry, Analytical
Ondrej Hesko, Miroslav Fojta, Jan Spacek
Summary: This study introduces a fast detection method for RNA polymerization products by measuring the oxidation signals of RNA on an electrode surface. By selectively desorbing the co-adsorbed cGMP using different surfactant solutions or elevated temperature water washing, the method allows for the selective analysis of polymerization products from mixtures.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Sabrina Houam, Abed Mohamed Affoune, Imene Atek, Fatima Kesri, Rania Saad Guermeche, Mohamed Lyamine Chelaghmia, Mouna Nacef, Omar Khelifi, Craig E. Banks
Summary: A semi-analytical approach was used to model and establish the profiles of Linear Sweep Voltammetry (LSV) for quasi-reversible electrochemical reactions involving soluble species. The effects of charge transfer coefficient (alpha) and dimensionless kinetic rate constant (?) on the shape and position of voltammograms were investigated. The combined effect on various LSV characteristics, such as peak current, half peak width, and peak potential, were qualitatively and quantitatively analyzed. Kinetic curves were constructed based on the changes in LSV characteristics with (alpha, ?) and modeled using interpolation functions. The obtained equations serve as a user-friendly tool for calculating the heterogeneous kinetic rate constant for quasi-reversible charge transfer. Experimental-theory validation was performed on ferrocyanide oxidation on screen-printed graphite electrodes.
ELECTROCHIMICA ACTA
(2023)
Article
Electrochemistry
Simon Genereux, Eric R. Dionne, Dominic Rochefort
Summary: This study investigates the effect of salt concentration in highly concentrated electrolytes (HCE) on the heterogeneous electron transfer (ET) rate through the ferrocenium/ferrocene (Fc+/Fc) redox couple. The results indicate that the strong coordination between ferrocenium and complexes in HCE is the likely cause for the difference in ET rate constant. This study highlights the importance of increasing fundamental research on electrochemistry in HCE.
ELECTROCHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Yalcin Altunkaynak, Omer Yavuz, Abdulkadir Levent
Summary: This work successfully determined vildagliptin at a pencil graphite electrode using cyclic voltammetry and square-wave voltammetry. A well-defined irreversible peak response was obtained, showing a good linear correlation between anodic current signal and concentration of vildagliptin. The developed voltammetric method was successfully applied for determination in pharmaceutical preparations and urine samples without the need for separation.
MICROCHEMICAL JOURNAL
(2021)
Article
Multidisciplinary Sciences
Guojin Liang, Bochun Liang, Ao Chen, Jiaxiong Zhu, Qing Li, Zhaodong Huang, Xinliang Li, Ying Wang, Xiaoqi Wang, Bo Xiong, Xu Jin, Shengchi Bai, Jun Fan, Chunyi Zhi
Summary: The use of an iodine-based cathode in combination with a Zn anode and a Cl-containing aqueous electrolyte solution demonstrates reversible high-energy interhalogen reactions. This approach allows for a specific discharge capacity of 612.5 mAh g(I2)(-1) and a discharge capacity retention of about 74% after 300 cycles. The efficient and reversible ClRR is achieved by utilizing interhalogen coordinating chemistry and redox-active halogen atoms.
NATURE COMMUNICATIONS
(2023)
Article
Electrochemistry
Pengcheng Zhu, Yuyuan Zhao
Summary: The pursuit of better electrochemical sensors requires new designs and materials. The concept of 'limiting current sensors' has been applied to ion detection in aqueous solutions, resulting in a prototype with improved sensitivity and detection performance. The sensor design shows potential for detecting other ions or molecules.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Applied
Jin-Lin Wan, Jing-Mei Huang
Summary: An electrochemical oxidative C-H/S-H cross-coupling reaction has been developed for the synthesis of heteroaryl vinyl sulfides. With acetonitrile and heteroaryl thiols as substrates, the reaction proceeds under metal-free and oxidant-free conditions, leading to high yields and stereoselectivities with excellent functional group tolerance. The synthetic applicability of this electrochemical method has been demonstrated through its easy scalability.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Engineering, Environmental
Nayeong Kim, Jemin Jeon, Johannes Elbert, Choonsoo Kim, Xiao Su
Summary: With the growing global population, achieving sustainable food production is a key challenge to mitigate environmental and nutrition crises. A sustainable and energy-efficient strategy involving a redox-mediated electrodialysis system has been proposed for valorizing whey waste, showcasing outstanding stability and economic potential.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Materials Science, Multidisciplinary
Zaklina Z. Tasic, Marija B. Petrovic Mihajlovic, Ana T. Simonovic, Milan B. Radovanovic, Milan M. Antonijevic
Summary: Electrochemical methods offer advantages for analysis and detection of chemical compounds, with pencil graphite electrodes proving to be an efficient and cost-effective material for detecting low concentrations of pharmaceutical compounds like paracetamol around 10(-9) M.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Physical
Jinkun Wang, Jianhong Liu, Li Wang, Hong Xu, Yang Yang, Li Sheng, Xiangming He
Summary: A straightforward method of changing the circuit and reducing current is found to significantly increase the lifespan of lithium metal reference electrode, providing important guidance for designing in-situ reference electrodes and improving their lifespan.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Minjun Yang, Christopher Batchelor-McAuley, Samuel Barton, Rosalind E. M. Rickaby, Heather A. Bouman, Richard G. Compton
Summary: This study introduces an opto-electrochemical acid titration method for measuring the mass range of coccoliths secreted by calcifying marine phytoplankton, showing variation in mass among four different species. The scientific breakthrough is expected to enable continuous monitoring and reporting of coccolith calcification in the changing marine environment without the need for species-specific knowledge or calibration.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Xin Chang, Christopher Batchelor-McAuley, Richard G. Compton
Summary: The study investigates the methanol oxidation reaction at the single nanoparticle scale under aqueous alkaline conditions. It is found that the catalytic activity of single nanoparticles can be preserved in ensembles of nanoparticles, reaching maximum catalytic rate at a potential of +0.05 V.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Yuqi Chen, Xiuting Li, Danlei Li, Christopher Batchelor-McAuley, Richard G. Compton
Summary: This study developed a simplified method for producing a pH-sensitive iridium electrode and optimized the in situ electrochemical fabrication of an iridium oxide film under neutral conditions. The formation of a pH-sensitive Ir(III/IV) hydrous film was confirmed via XPS, and the electrochemically generated material showed good amperometric pH-sensing properties in the pH range 2-13. The newly developed pH sensor demonstrated excellent performance in measuring the pH of natural water samples compared to a conventional glass pH probe.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2021)
Article
Chemistry, Physical
Ruo-Chen Xie, Christopher Batchelor-McAuley, Minjun Yang, Richard G. Compton
Summary: Reflective dark field microscopy was used to observe the decrease in light scattered from Ag nanoparticles immobilised on various solid substrates, with the physical origin of this transformation shown to be the electrochemical dissolution of the metal nanoparticles. The dissolution kinetics of the surface-supported metal nanoparticles on different substrates were compared, demonstrating the redox-driven dissolution of Ag nanoparticles with electron transfer to dioxygen being catalyzed by conductive substrates.
Article
Chemistry, Analytical
Rachel Wong, Christopher Batchelor-McAuley, Minjun Yang, Richard G. Compton
Summary: Numerical simulation is used to analyze the diffusional flux of square cuboid particles in solution, either isolated or supported on a substrate. The flux is expressed as that to a sphere with an 'effective' radius, which depends on the particle shape, size, and support.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Owen Orrick, Minjun Yang, Christopher Batchelor-McAuley, Richard G. Compton
Summary: This study investigates single-entity electrochemical analysis involving Fickian charge diffusion over the surface of a (truncated) sphere through numerical simulation. The changing shape of the flux-time transient as diffusion regimes change over the sphere surface from the point of charge injection is characterized using a newly introduced diffusion indicator, alpha. The indicator effectively illuminates the transition of diffusion patterns from divergent near the injection point to linear at the sphere circumference, and then to convergent before being limited by the thinlayer effect.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Rachel L. Pindar, Christopher Batchelor-McAuley, Minjun Yang, Richard G. Compton
Summary: This study explores the electrochemical reactions in seawater, focusing on the coupled chemistry with the components of seawater, especially the role of the carbonate-bicarbonate buffer system in proton-coupled electron transfer reactions. The presence or absence of various buffer systems, such as phosphate, formate, or bicarbonate, influences the voltammetric response of reversible hydrogen oxidation reactions. The research findings are supported by numerical simulations based on a simple Nernstian model, showing excellent agreement with experimental results.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Minjun Yang, Christopher Batchelor-McAuley, Enno Kaetelhoen, Richard G. Compton
Summary: This study presents a new method for characterizing diffusional transport within porous layers, which is important for designing new amperometric sensors and electro-catalytic electrodes. By analyzing the current-time transients and utilizing the diffusion indicator alpha, the research reveals bottlenecks to transport caused by spherical blocks and the timescale at which this occurs. This method also provides a way to estimate the thickness of the porous layer.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Analytical
Danlei Li, Christopher Batchelor-McAuley, Richard G. Compton
Summary: An amperometric method was used to measure oxygen content in sheep's blood, with a linear relationship observed between chronoamperometric current and oxygen concentration. Additionally, this study presents the first investigation of direct voltammetry in sheep's blood and proposes a dissociative CE process to explain the electrochemical behavior of oxygen reduction.
Article
Chemistry, Physical
Rachel Wong, Christopher Batchelor -McAuley, Minjun Yang, Richard G. Compton
Summary: This study investigates the effect of heterogeneity in activity on the response of nanoparticles and reveals that the number of active faces is not directly proportional to the flux, but is influenced by the activity of nearby faces.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Analytical
Xinmeng Fan, Christopher Batchelor-McAuley, Minjun Yang, Samuel Barton, Rosalind E. M. Rickaby, Heather A. Bouman, Richard G. Compton
Summary: This paper presents a new calibration method for the Coulter Counter to accurately measure the calcite content in cells. The method involves measuring and tracking the acid-driven calcite dissolution reaction to determine the amount of calcite in cells.
ANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Christopher Batchelor-McAuley, Minjun Yang, Rosalind E. M. Rickaby, Richard G. Compton
Summary: This perspective discusses the confusion and contradictions in the description of the calcite dissolution reaction, highlighting the importance of mass-transport in experimental and oceanic sediment dissolution.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Review
Chemistry, Physical
Christopher Batchelor-McAuley
Summary: The onset potential is widely used to measure the electrocatalytic activity but lacks a single and agreed definition or a standard measurement procedure. This review discusses the different definitions used in the literature. However, regardless of how it is measured, the onset potential is sensitive to catalyst loading and specific surface area, making the mass-activity or specific-activity a better method for measuring the activity of an electrocatalyst.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jiahao Yu, Minjun Yang, Christopher Batchelor-McAuley, Samuel Barton, Rosalind E. M. Rickaby, Heather A. Bouman, Richard G. Compton
Summary: A fluorescence-electrochemical method is used to study the response of phytoplankton to electro-generated oxidants, allowing for high-throughput species analysis.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Chemistry, Analytical
Xinmeng Fan, Christopher Batchelor-McAuley, Minjun Yang, Richard G. Compton
Summary: The kinetics of calcite dissolution at the single particle scale are determined, showing that the dissolution rate of particulate minerals is controlled by the saturated calcite surface in local equilibrium with dissolved Ca2+ and CO32- ions, and further influenced by the diffusive transport of these ions away from the surface. Previous research assumptions are revisited and inconsistencies due to surface-controlled reactions are emphasized. These findings have implications for simulating climate change in the ocean.
ACS MEASUREMENT SCIENCE AU
(2022)