Article
Biochemical Research Methods
Veronika Svitkova, Katarina Nemcekova, Vlastimil Vyskocil
Summary: In this study, a mercury meniscus-modified silver solid amalgam electrode was used for the detection of UV-induced DNA damage. The integrity of the double-stranded DNA layer was indirectly detected using methylene blue reduction, and different wavelengths of UV irradiation resulted in different electrochemical signals.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Julius Gajdar, Kristina Stafurova, Jiri Barek, Jan Fischer
Summary: A novel retractable-pen-based renewable silver amalgam film electrode (RAE) was introduced for electrochemical sensing of electrochemically reducible compounds, offering good repeatability and low limit of quantification for environmental pollutant detection. This electrode utilizes mechanisms found in a common retractable ballpoint pen for mechanical renewal of the amalgam film.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Electrochemistry
Veronika Svitkova, Vlastimil Vyskocil
Summary: Cyclic voltammetry and differential pulse voltammetry were used to study the behavior of methylene blue at a mercury meniscus-modified silver solid amalgam electrode. Electrochemical impedance spectroscopy was used for verification and comparison. It was found that the reduction signal of methylene blue was significantly higher at the DNA-modified silver amalgam electrode compared to the unmodified electrode, which correlated with changes in charge transfer resistance. Optimized parameters were determined for further biosensor development and applications.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Anna Gorska, Beata Paczosa-Bator, Marek Szlosarczyk, Robert Piech
Summary: A new highly sensitive voltammetric method for captopril determination was developed using a renewable amalgam film electrode. The method showed low detection limit and good linearity range, suitable for analyzing samples such as tablets containing CPT and urine.
Article
Chemistry, Analytical
Andrii Dmukhailo, Sofiia Tvorynska, Liliya Dubenska
Summary: This research paper investigates the electrochemical reduction of the synthetic food azo dye tartrazine (TZ) on three different types of silver solid amalgam electrodes (AgSAEs). The study compares the performance of AgSAEs with dropping mercury electrode. The results show that m-AgSAE using LS-AdSV offers the best limit of detection (0.078 mu mol L-1) and the limit of quantification (0.24 mu mol L-1) for TZ determination.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Canwei Mao, Dajing Yuan, Lu Wang, Eric Bakker
Summary: Thin ion-selective membrane films deposited on solid electrode substrates are useful tools for studying ion transfer processes. The experimental conditions can be chosen to make diffusion processes within the membrane and contacting aqueous solution not rate limiting, allowing equilibrium considerations to describe ion transfer voltammograms. This work describes a model system that agrees with thermodynamic theory, using a redox molecule and a monovalent reference cation for ion transfer. The results show that the full peak width is consistent with theory, with peak current proportional to scan rate supporting thin layer behavior.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Pavlina Havranova, Lukas Fojt, Lukas Kejik, Tomas Sikola, Miroslav Fojta, Ales Danhel
Summary: The electrodeposition of silver amalgam particles on screen-printed silver electrodes optimized for the detection of electrochemically reducible compounds. The method allowed for sensitive detection of organic compounds and artificial nucleosides, as well as proteins, showcasing potential applications in chemical and synthetic biology research.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Xiaolei Yan, Xiaoxia Yu, Jianye Pei, Lihua Bi
Summary: The development of sensors for detecting 2,4-dinitrophenylhydrazine (2,4-DNPH) and its metabolites is of great significance due to its high toxicity to humans and the environment. In this study, Cu-containing tungstophosphate (Cu4P4W30) was investigated for its electrocatalytic activity in the reduction of 2,4-DNPH and oxidation of its metabolite. The modified electrode showed good sensing performance for the detection of 2,4-DNPH and its metabolite.
Article
Chemistry, Analytical
Uarlei Douglas dos Santos, Djenaine De Souza, Sergio Antonio Spinola Machado
Summary: This study presents a method for the determination of folic acid (FA) using polished silver solid amalgam electrode (p-AgSAE) and square wave voltammetry. The experimental and voltammetric parameters were optimized, and a well-defined voltammetric peak was observed on the p-AgSAE surface, indicating a reversible redox reaction involving reactant and product adsorption. A linear relationship between peak current and FA concentration was established, with a wide concentration range, high correlation coefficient, and good precision. The method was successfully applied to FA determination in spinach and corn chip samples, demonstrating the robustness of the proposed methodology and the advantages of using p-AgSAE as an alternative electrode.
JOURNAL OF ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kristina Stafurova, Julius Gajdar, Jiri Barek, Jan Fischer
Summary: The novel RAE design, utilizing mechanisms from a retractable ballpoint pen, allows for mechanical renewal of the amalgam film. With a minimum amount of liquid amalgam providing several months of use, portability, long-term stability, simple surface renewal, and a wide cathodic potential window, the RAE is a suitable alternative to traditional mercury electrodes for the determination of cadmium (II). The obtained LOQ for cadmium (II) in acetate buffer at pH 4.8 was determined to be 54 nmol L-1 (6.1 ppb).
Article
Environmental Sciences
Gulsah Congur
Summary: Glyphosate is commonly used herbicide, but its carcinogenic and genotoxic potential has been extensively investigated worldwide in recent years. The study developed an electrochemical biosensor platform to investigate the interaction between glyphosate and DNA, as well as the synergistic genotoxic effect of glyphosate and 2,4-dichlorophenoxyacetic acid on DNA. Results showed that the herbicide mixture exhibited more genotoxic effect.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Multidisciplinary
Danielle Goncalves Filho, Djenaine de Souza
Summary: This study developed a simple, sensitive, fast, and green electroanalytical method for determining trifluralin herbicide in fresh food samples using a polished silver solid amalgam electrode (p-AgSAE) combined with square wave voltammetry (SWV). Optimization of experimental and voltammetric parameters allowed for the calculation of analytical parameters, indicating the suitability of p-AgSAE for detecting trifluralin contamination. The proposed methodology showed high robustness, stability, sensitivity, and reproducibility, making it applicable for complex samples such as eggplant, carrot, tomato, grape juice, and orange juice.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Fernanda C. O. L. Martins, Djenaine De Souza
Summary: This work presents the development of an electroanalytical method for detecting nanomolar levels of selenium, utilizing a silver solid amalgam electrode modified with a stable mercury film and square-wave cathodic adsorptive stripping voltammetry. The optimized parameters resulted in satisfactory results, providing potential for selenium detection in food and beverage samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Hirotada Gamo, Kazuhiro Hikima, Atsunori Matsuda
Summary: The study reveals that in all-solid-state lithium-sulfur batteries, the oxidation reaction of Li2S proceeds simultaneously with a continuous oxidative decomposition of sulfide solid electrolytes. The research focuses on the redox chemistry related to Li2S/S conversion reaction, electrolyte decomposition, and redox reaction of the decomposition product.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Antonio Domenech-Carbo
Summary: This article describes a semiempirical model for describing the voltammetry of non-topotactic solid-to-solid redox processes in immobilized particles electrochemistry. The model is successfully applied to the reduction of solid metal compounds and has been verified through experiments.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Biochemistry & Molecular Biology
Veronika Sykorova, Michal Tichy, Michal Hocek
Summary: All four iodinated 2'-deoxyribonucleoside triphosphates were successfully incorporated into DNA by KOD XL DNA polymerase, with 5-iodopyrimidines showing higher reactivity. These findings are useful for post-synthetic modification of DNA with functional groups.
Article
Chemistry, Multidisciplinary
Denise-Liu' Leone, Radek Pohl, Martin Hubalek, Marta Kaderabkova, Matous Kromer, Veronika Sykorova, Michal Hocek
Summary: Glyoxal-linked nucleotides were synthesized and used for efficient bioconjugations and crosslinking with arginine-containing peptides or proteins. The reactive glyoxal modification in DNA was found to be more reactive than previously reported 1,3-diketone-linked DNA probes.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Aswathi Chakrapani, Olatz Ruiz-Larrabeiti, Radek Pohl, Martin Svoboda, Libor Krasny, Michal Hocek
Summary: This study investigates the effects of glucosylation on DNA containing modified bases and its impact on transcription activity in bacteriophages or kinetoplastid parasites. The results show that glucosylation fully protects DNA from restriction endonuclease cleavage and while glucosylated 5hmU inhibits transcription, glucosylated 5hmC allows similar levels of transcription as natural DNA. Therefore, enzymatic glucosylation of 5hmC-containing DNA can be used to modulate transcription activity.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Maria Brunderova, Matous Kromer, Marta Vlkova, Michal Hocek
Summary: We designed and synthesized a chloroacetamide-linked 7-deaza-ATP substrate for T7 RNA polymerase, which was used to synthesize reactive RNA probes with one or more reactive modifications. The modified RNA probes reacted with thiol-containing molecules and cysteine- or histidine-containing peptides, forming stable covalent products. They also selectively reacted with RNA-binding proteins, forming cross-linked conjugates with high conversions due to proximity effect. Our modified nucleotide and RNA probes are promising tools for RNA (bio)conjugations or RNA proteomics applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemical Research Methods
Miroslav Kuba, Radek Pohl, Tomas Kraus, Michal Hocek
Summary: Nucleosides and 2'-deoxyribonucleoside triphosphates (dNTPs) containing a bodipy fluorophore attached to position S of 2'-deoxycytidine were synthesized. They exhibited strong fluorescence and sensitivity to viscosity. The modified dNTPs served as substrates for DNA polymerases and were used for enzymatic synthesis of labeled DNA. The modified DNA probes acted as viscosity sensors, responding to protein binding. The dNTP with a longer linker was successfully transported into live cells and incorporated into genomic DNA, enabling DNA staining and imaging of DNA synthesis.
BIOCONJUGATE CHEMISTRY
(2023)
Article
Electrochemistry
Daniel Dobrovodsky, Ales Danhel, Emmanuelle Mothes-Martin, Genevieve Pratviel, Daniel Renciuk, Miroslav Fojta
Summary: In this study, two electrochemically active compounds, Cu-TMPy2PP and dGNPTP, were used as probes to investigate the effects of electrode potential on ODNs and their abilities to form secondary structures at the HMDE surface. The results showed that G-rich ODNs with the potential to form G-quadruplexes formed less dense adsorbed layers compared to other sequences. Additionally, the G4-forming ODNs were more easily desorbed from the HMDE surface at highly negative potentials, as confirmed by gel electrophoresis. This application of electrochemical probes provides a useful method for studying DNA conformations and transitions.
ELECTROCHIMICA ACTA
(2023)
Article
Biochemical Research Methods
Ambra Spampinato, Erika Kuzmova, Radek Pohl, Veronika Sykorova, Milan Vrabel, Tomas Kraus, Michal Hocek
Summary: A series of modified dNTPs with different linkers were designed and synthesized as substrates for DNA polymerase. The reactivity of these modified nucleotides and DNA was systematically tested and compared in click reactions. The longer linker was found to be crucial for efficient labeling. These modified dNTPs were transported into live cells and successfully used for staining DNA and imaging DNA synthesis within short time periods. This method provides a new approach for in cellulo metabolic labeling and imaging of DNA synthesis that overcomes previous limitations.
BIOCONJUGATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Catherine Mulholland, Ivana Jestrabova, Arghya Sett, Marek Ondrus, Veronika Sykorova, C. Lorena Manzanares, Oliver Simoncik, Petr Muller, Michal Hocek
Summary: The authors describe the selection of hydrophobic 7-phenylbutyl-7-deazaadenine-modified DNA aptamers against Heat Shock Protein 70 using PEX and magnetic bead-based SELEX. The modified aptamers showed higher binding affinity to Hsp70 than their natural counterparts and have potential for diagnostic or therapeutic applications.
COMMUNICATIONS CHEMISTRY
(2023)
Article
Chemistry, Analytical
David Kodr, Mayreli Ortiz, Veronika Sykorova, Cansu Pinar Yenice, Zbigniew J. Lesnikowski, Ciara K. O'Sullivan, Michal Hocek
Summary: The previous approach of orthogonal multipotential redox coding only allowed analysis of relative nucleotide composition of short DNA stretches. In this study, two methods for normalization of electrochemical readout were presented, enabling determination of total nucleotide composition. The first method involved the presence or absence of an internal standard in the DNA primer, while the second method utilized a viologen-modified primer acting as a reference label for signal normalization. Both methods accurately analyzed DNA sequences and demonstrated potential for targeted DNA sequence analysis.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Miroslav Kuba, Petro Khoroshyy, Martin Lepsik, Erika Kuzmova, David Kodr, Tomas Kraus, Michal Hocek
Summary: A modified dC(TO)TP was designed and synthesized with a thiazole orange moiety tethered via an oligoethylene glycol linker. It could be incorporated into DNA by DNA polymerases in vitro and live cells. The fluorescence lifetime of the thiazole orange moiety differed significantly when dC(TO)TP was incorporated into DNA compared to its non-incorporated forms. By delivering dC(TO)TP into live U-2 OS cells using a synthetic nucleoside triphosphate transporter, it enabled real-time detection and monitoring of cells actively synthesizing DNA from the beginning.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Chao Yang, Michal Tichy, Lenka Postova Slavetinska, Enzo Vaiedelich, Sona Gurska, Petr Dzubak, Marian Hajduch, Michal Hocek
Summary: This study reports the design and synthesis of a series of benzofuro-fused 7-deazapurine nucleosides and ribonucleosides. The target compounds were successfully synthesized through multiple reactions, and showed moderate to weak cytostatic activity and interesting fluorescence properties.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Natalia Kuprikova, Marek Ondrus, Lucie Bednarova, Miguel Riopedre-Fernandez, Lenka Postova Slavetinska, Veronika Sykorova, Michal Hocek
Summary: Researchers designed and synthesized a set of new DNA nucleotide derivatives, which were successfully used for DNA modification and hypermodification. The study found that one to two modified nucleotides could achieve exponential amplification in PCR, while three to four modified nucleotides only achieved linear amplification. In addition, hypermodified DNA exhibited a different secondary structure.
NUCLEIC ACIDS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Mayreli Ortiz, Miriam Jauset-Rubio, Olivia Trummer, Ines Foessl, David Kodr, Josep Lluis Acero, Mary Luz Botero, Phil Biggs, Daniel Lenartowicz, Katerina Trajanoska, Fernando Rivadeneira, Michal Hocek, Barbara Obermayer-Pietsch, Ciara K. O'Sullivan
Summary: A generic platform was developed for cost-effective and rapid electrochemical SNP genotyping from fingerprick blood samples, enabling early diagnosis of osteoporosis. The platform utilizes isothermal solid-phase primer elongation with ferrocene-labeled nucleoside triphosphates, allowing for targeted genotyping of SNPs associated with osteoporosis. The system was validated using real blood samples, with results matching those from Taqman SNP genotyping assays and Sanger sequencing. The platform is highly versatile and has the potential to be deployed in an automated device for targeted SNP genotyping.
ACS CENTRAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ivana Jestrabova, Lenka Postova Slavetinska, Michal Hocek
Summary: We designed and synthesized a series of novel nucleoside phosphoramidites for the solid-phase synthesis of modified oligonucleotides. The hybridization properties of these modified oligonucleotides were studied, and they have potential for the synthesis of highly modified functional nucleic acid-based polymers.
Article
Chemistry, Multidisciplinary
David Kodr, Erika Kuzmova, Radek Pohl, Tomas Kraus, Michal Hocek
Summary: We designed and synthesized lipid-modified dNTPs, which served as substrates for DNA polymerase and could be incorporated simultaneously into the DNA strand. These lipid-ON probes showed enhanced membrane anchoring efficiency and better stability in the cell membrane compared to commonly studied ON analogues. The probes were detected at the cell surface even after 24 hours, indicating their long-lasting effect.
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)
