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, Inorganic & Nuclear
Esmeralda Bukuroshi, Amir Mizrahi, Zeev Gross, Timothy P. Bender
Summary: The electrochemical behavior of boron subphthalocyanines was investigated through cyclic voltammetry, focusing on the impact of various factors on the redox potentials of the compounds. Shifts in redox potentials were observed when changing internal standards, working electrodes, and electrolyte concentrations. The electron transfers for halogenated BsubPcs remained diffusion-controlled within a specific scan rate range.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Analytical
Kamsy Lerae Anderson, Martin Andrew Edwards
Summary: Scanning electrochemical cell microscopy (SECCM) uses an electrolyte-filled nanopipette to map the electrochemical activity of a surface with nanoscale resolution. This study provides algebraic expressions for current and concentration distributions in SECCM experiments, which show excellent agreement with numerical simulations and can be used to determine expected currents and quantify electron-transfer rate constants.
ANALYTICAL CHEMISTRY
(2023)
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)
Review
Chemistry, Inorganic & Nuclear
Zufar N. Gafurov, Artyom O. Kantyukov, Alexey A. Kagilev, Oleg G. Sinyashin, Dmitry G. Yakhvarov
Summary: Electrochemical methods show great potential in synthesizing organometallic compounds, with direct electrochemical synthesis of organometallic derivatives by forming carbon-metal bonds being particularly important in practice. Techniques such as cyclic voltammetry play a crucial role in the analysis and preparation of organometallic compounds.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Jaloliddin Khushvakov, Robin Nussbaum, Cecile Cadoux, Jifu Duan, Sven T. Stripp, Ross D. Milton
Summary: Gas-processing metalloenzymes, such as hydrogenases and nitrogenases, are of interest for future bio- and bioinspired technologies. This study uses RRDE and MS techniques to track the production of hydrogen and isotopes by the [FeFe]-hydrogenase, providing insights into catalytic mechanisms and the design of bioinspired catalysts for H-2 production and N-2 fixation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
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, Physical
Nurul Affiqah Arzaee, Mohamad Firdaus Mohamad Noh, Azhar Ab Halim, Muhammad Amir Faizal Abdul Rahim, Nur Suraya Haziqah Mohd Ita, Nurul Aida Mohamed, Siti Nur Farhana Mohd Nasir, Aznan Fazli Ismail, Mohd Asri Mat Teridi
Summary: In this study, the effect of electrochemical cyclic voltammetry treatment on alpha-Fe2O3 thin films was investigated. It was found that after 50 cycles, the photocurrent density increased by 1.5 times due to changes in crystal orientation and increased surface oxygen vacancies. These findings provide valuable information for improving the photoelectrochemical performance of a photoanode.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Kiana S. Sykes, Ryan J. White
Summary: This paper characterizes the mass-transport-limited response of surface-tethered redox moieties via flexible DNA linkers, demonstrating that peak splitting can differentiate between different electrochemical regimes. The transition between reversible, quasi-reversible, and irreversible regimes depends on the length and structure of the DNA probe, with longer probes leading to transitions at lower scan rates. By comparing peak splitting and peak current as a function of scan rate for different nucleic acid probes, the study highlights the importance of nucleic acid structure and flexibility in controlling the mass transfer rate of the redox probe to the electrode surface.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Xianxian Xie, Athira Lekshmi Mohandas Sandhya, Lesia Piliai, Mykhailo Vorokhta, Iva Matolinova, Ivan Khalakhan
Summary: Platinum-based bimetallic alloys possess unique activities exceeding those of pure platinum. They suffer from surface structural reorganization under operating conditions, significantly affecting their lifetime performance. This study investigates the surface compositional changes in a PtNi catalyst during repetitive cycles and confirms the resulting catalyst deactivation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Sauraj Jha, Mehedhi Hasan, Nischal Khakurel, Conor A. Ryan, Reema McMullen, Aditya Mishra, Anton Malko, Alexander A. Zakhidov, Jason D. Slinker
Summary: This article provides an overview of recent approaches to electrochemical measurements and modifications of halide perovskites, with a specific focus on stability and doping. The use of a solvent toolkit based on hydrofluoroethers is demonstrated to enhance the conductivity and performance of thin film devices for optoelectronic applications.
MATERIALS TODAY ADVANCES
(2022)
Review
Biochemistry & Molecular Biology
Joanna Smajdor, Beata Paczosa-Bator, Robert Piech
Summary: This article presents advances in the electrochemical determination of hormones and steroids since 2000. It discusses various techniques and working electrodes used in reported measurements to achieve the lowest possible limits of detection. Voltammetric and polarographic techniques have been identified as alternative methods due to their sensitivity and simplicity. The growing interest in designing new working electrode constructions has allowed for the development of new measurement procedures and lower limits of detection. The article also provides a brief description of the measured compounds and a comparison of the obtained results.
Article
Electrochemistry
Zihao Cui, Xizhuang Liang, Peng Wang, Peng Zhou, Qianqian Zhang, Zeyan Wang, Zhaoke Zheng, Yuanyuan Liu, Ying Dai, Baibiao Huang
Summary: The study investigated Fe3N@Co4N@CoFe alloy nanoparticles as catalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), demonstrating excellent performance. After cyclic voltammetry (CV) cycles, the catalyst also showed impressive competency in overall water splitting.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Igors Sokolovs, Nayereh Mohebbati, Robert Francke, Edgars Suna
Summary: In contrast to hypervalent iodine(III) compounds, little research has been done on isoelectronic bromine(III) compounds. A new method for preparing chelation-stabilized lambda(3)-bromanes was presented in this study, demonstrating their synthetic utility in oxidative reactions. The reactivity of stable bromine(III) species can be unlocked by the addition of a Lewis or a Bronsted acid, leading to the formation of C-C, C-N, and C-O bonds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Sevcan Erden
Summary: A new square wave anodic adsorptive stripping voltammetric method was developed to determine the content of cefpodoxime proxetil in pharmaceuticals. The method showed accurate results under optimized conditions of pH 3.0, accumulation time of 15 seconds, and accumulation potential of 0.0 V.
MONATSHEFTE FUR CHEMIE
(2021)
Article
Electrochemistry
Wencong Wang, Changhee Lee, Yuto Miyahara, Takeshi Abe, Kohei Miyazaki
Summary: This study achieved fluorine doping into the surface structure of LiNi0.6Co0.2Mn0.2O2 (NCM622) cathodes using the atomic layer deposition method. The fluorinated NCM622 cathodes demonstrated improved electrochemical properties, including satisfactory cycling stability, compared to the non-fluorinated ones. The higher binding energy of fluorine positively influenced the stability of the surface oxygen layer, suppressing the formation of oxygen derivative phases during electrochemical reactions.
Article
Chemistry, Physical
Yuta Ito, Changhee Lee, Yuto Miyahara, Shigeaki Yamazaki, Takaya Yamada, Kentaro Hiraga, Takeshi Abe, Kohei Miyazaki
Summary: This study found that F- anions can be electrochemically inserted or deinserted into or from carbon based materials using graphite fluoride (GF) and a high potential Li-based organic electrolyte. The study also observed the formation of amorphous carbon and LiF after insertion, with a discharge capacity almost in line with the theoretical value. The electrochemical properties were determined to be the result of the reversible insertion and deinsertion of F- anions triggered by the formation of LiF.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kohei Miyazaki, Atsushi Mizawa, Yuta Ito, Fumihiro Sagane, Takeshi Abe
Summary: In this study, the formation kinetics of graphite intercalation compounds (GICs) were investigated, and it was found that the activation energy of interfacial anion transfer resistance is correlated with the viscosity of the ionic liquid electrolytes. This relationship provides important insights for the construction of dual-ion batteries with high capacity and high rate capability.
Article
Electrochemistry
Kingo Ariyoshi, Atsushi Mineshige, Mitsuhiro Takeno, Tomokazu Fukutsuka, Takeshi Abe, Satoshi Uchida, Zyun Siroma
Summary: This paper presents the practical applications and measurement methods of Electrochemical Impedance Spectroscopy (EIS) in the analysis of various electrochemical devices, including solid electrolytes, Li-ion batteries, and electric double-layer capacitors. The importance of accurate impedance data measurement for equivalent circuit analysis is emphasized. The paper provides experimental cautions, measurement examples, and techniques for achieving reliable EIS measurements in different applications.
Editorial Material
Electrochemistry
Naoya Nishi, Yohei Kuroyama, Naohiro Yoshida, Yuko Yokoyama, Tetsuo Sakka
Summary: This article presents the research achievements of Dr. Naoya Nishi's team from Kyoto University. The cover picture shows the water-free liquid-liquid interface between an ionic liquid and oil, where base metal nanostructures can be formed via the electron transfer reaction between metal ions on the ionic liquid side and reducing agents on the oil side of the interface.
Article
Electrochemistry
Naoya Nishi, Yohei Kuroyama, Naohiro Yoshida, Yuko Yokoyama, Tetsuo Sakka
Summary: In this study, a novel waterfree ITIES method was introduced to overcome the limitation of metal deposition at the interface. Zinc, a base metal, was successfully deposited at the ionic liquid/oil interface. The morphology of zinc nanostructures and the reaction mechanism involving electron and ion transfer reactions across the interface were investigated.
Article
Chemistry, Multidisciplinary
Daichi Kato, Peng Song, Hiroki Ubukata, Haruki Taguro, Cedric Tassel, Kohei Miyazaki, Takeshi Abe, Kousuke Nakano, Kenta Hongo, Ryo Maezono, Hiroshi Kageyama
Summary: Based on ab initio structure searches using evolutionary algorithms, we explored the LaF3-LaX3 (X=Cl, Br, I) system and predicted the structures of LaF2X and LaFX2 (X=Br, I) compounds. LaF2Br and LaFI2 were successfully synthesized and LaF2I showed similar structure but different layer stacking. LaF2I exhibits fluoride ion conductivity comparable to that of non-doped LaF3 and has the potential for better ionic conductivity with appropriate doping. This study demonstrates that structure prediction using evolutionary algorithms can accelerate the discovery of mixed-anion compounds, particularly those with an ordered anion arrangement.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Electrochemistry
Yuko Yokoyama, Mitsuo Kawasaki, Takeshi Abe, Zempachi Ogumi, Kenji Kano
Summary: The ion equilibrium of Li+- or Mg2+-containing solutions with CsF solutions was investigated through conductometric titration in this study. It was found that precipitation can be avoided in certain ranges of the F-/Li+ or F-/Mg2+ molar ratio by the formation of triple/associated ions.
Article
Electrochemistry
Danni Yu, Changhee Lee, Wencong Wang, Yuto Miyahara, Kohei Miyazaki, Takeshi Abe
Summary: A novel concept of solid electrolyte interphase (SEI)-ization of Mg2+-blocking layers has been introduced to improve the deposition quality of Li in anode-free rechargeable Li-metal batteries. Thin, dense, and stable surface layers exhibiting permeability for Li+ and impermeability for Mg2+ ions were formed in Li-Mg electrolytes, significantly suppressing the Li dendrite growth and enhancing the deposited Li metal/Cu CC surface binding. The Mg2+-blocking layers acted as effective SEI layers, positively influencing the electrochemical performance of the AFLMB full cells.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Haru Kitaoka, Naoya Nishi, Yuko Yokoyama, Tetsuo Sakka
Summary: The clustering of hydrogen-bonding molecules in liquid and the influence of solid surfaces on the interfacial structure of hydrogen-bonding clusters are important for the properties of liquids and interfacial properties.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Electrochemistry
Shota Tsujimoto, Changhee Lee, Yuto Miyahara, Kohei Miyazaki, Takeshi Abe
Summary: Non-graphitizable carbon enables stable and high-capacity sodium storage in sodium-ion batteries (SIBs) through reversible sodium-ion intercalation. This study investigated the interfacial reactions between various electrolytes and a non-graphitizable carbon electrode for their use in SIBs. The results showed that NaF obstructs the penetration pathway of sodium ions into non-graphitizable carbon, impacting the charge transfer resistance and rate stability of SIBs.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Meeting Abstract
Chemistry, Physical
Mitsuhiro Takeno, Seiji Katakura, Kohei Miyazaki, Takeshi Abe, Tomokazu Fukutsuka
Article
Chemistry, Analytical
Naoya Nishi, Hiromasa Baba, Takashi Yamazawa, Yuko Yokoyama, Tetsuo Sakka
Summary: Electrochemical second harmonic generation (ESHG) was used to investigate the slow dynamics of the electric double layer (EDL) at the ionic liquid (IL)/Au interface. The ultraslow relaxation in ESHG was found to be a common phenomenon for the studied ILs, with the asymmetry of the time constants depending on the IL ions. Additionally, the potential dependence of the SHG signal deviated from a simple parabolic relationship, indicating a camel-shaped static differential capacitance for the EDL in ILs.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Review
Chemistry, Physical
Yuta Ito, Jiayuan Ni, Changhee Lee, Xinli Gao, Yuto Miyahara, Kohei Miyazaki, Takeshi Abe
Summary: This comprehensive review summarizes the correlation between the fundamental properties of carbon defects and electrochemical Li and Na storage mechanisms for Li- and Na-based rechargeable batteries, with a special focus on atomic-scale science and technology, which play a notable role in investigating and understanding the interaction between the defect phases and charge carriers in carbon structures.
CHEMICAL PHYSICS REVIEWS
(2023)
Article
Electrochemistry
Wencong Wang, Changhee Lee, Yuto Miyahara, Takeshi Abe, Kohei Miyazaki
Summary: This study used TMSPi as an additive to form a barrier layer on a LiNi0.6Co0.2Mn0.2O2 thin-film electrode, mitigating the attack on the oxygen sites of the Ni-rich structure and facilitating rapid Li-ion transfer due to the Li-rich organic components.
