Article
Biochemistry & Molecular Biology
Hugo C. Hernandez-Toledo, Marcos Flores-Alamo, Ivan Castillo
Summary: Two novel Iron (II) complexes with tetrapodal bis(benzimidazole)amino thio- and selenoether ligands were synthesized, characterized, and tested as electrocatalysts for the hydrogen evolution reaction. The bromide complexes [Fe(LS,LSe)Br2] were highly insoluble, but their DMSO solvates were characterized by single crystal X-ray diffraction, revealing an octahedral coordination environment without coordination of the chalcogen atoms. The corresponding triflate derivatives [Fe(LS,LSe)(MeCN)3]OTf2 were employed for electrocatalytic proton reduction, with 1c showing higher activity, suggesting the thioether ligand may be more competent for proton transfer.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xu Li, Na Li, Le Yang, Hao-Sen Chen, Wei-Li Song
Summary: The relationship between interface structure and electrode reactivity in electrochemistry is crucial. Electrochemical methods on the single-particle scale have advantages in establishing the structure-property relationship. Recent achievements in electrochemical energy storage and electrocatalysis have enabled the understanding of electrode evolution and kinetics through single-particle measurements. This concept provides an overview of the progress in single-particle measurements in related electrochemical processes, as well as discusses the challenges and prospects for their development and application.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Electrochemistry
Victoria Kompanijec, John R. Swierk
Summary: This study evaluated the use of five materials as electrochemical catalysts for the oxidation of DBT, with gold showing the highest selectivity for DBTO formation in the presence of water. The overall reaction activity improved with the presence of water, indicating the importance of water in the oxidation process.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Bo Song, Zhaoyang Wang, Junfeng Li, Yanan Ma
Summary: A particle electrode was synthesized from kaolin and steel slag, with optimized preparation conditions resulting in significantly improved electrocatalytic activity for degrading methylene blue in a 3D electrochemical oxidation reactor compared to a 2D reactor. The kaolin/steel slag particle electrode also exhibited good cycle performance.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
John C. Ruth, Alfred M. Spormann
Summary: This article outlines the catalytic properties of electroactive enzymes in redox reactions and highlights their potential in environmentally friendly production of industrial chemicals. The authors discuss the current challenges in achieving high catalytic rates and stability, as well as two promising improvements in existing enzymatic electrochemical systems.
Review
Chemistry, Multidisciplinary
Subramanian Sowmya, Vijendran Vijaikanth
Summary: Development of clean and renewable energy sources, particularly hydrogen gas, has gained significant attention as an alternative to fossil fuels. This review focuses on the recent advances in electrochemistry and various approaches used to attach cobaloxime complexes to electrode surfaces and analyze their electrocatalytic behavior.
Article
Chemistry, Physical
Paolo Cignoni, Niclas Blanc, Kristina Tschulik
Summary: The advancement of electrocatalysis from fundamental research to application requires seamless collaboration between researchers from different fields. This mini review highlights the common problems faced when evaluating the performance of complex electrode assemblies made of nanostructured materials. Applying classical kinetic descriptors to these assemblies often makes it challenging to distinguish and attribute material properties to electrode performance. Recent advancements in discerning and analyzing electrocatalysis on composite or nanostructured electrodes are discussed, with emphasis on detecting and addressing inhomogeneities in the electrocatalytic activity of three-dimensional electrodes.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Thomas Quast, Harshitha Barike Aiyappa, Sascha Saddeler, Patrick Wilde, Yen-Ting Chen, Stephan Schulz, Wolfgang Schuhmann
Summary: Nano-electrochemical tools were used to assess the catalytic activity of individual Co3O4 nanoparticles, showing size-dependent high catalytic activity. The efficient SEM-controlled robotic technique successfully placed single catalyst particles on carbon-based nanoelectrodes, leading to a stable nanoassembly with excellent electrochemical performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
A. A. Tsygankov, N. A. Zorin, A. S. Starodubov, M. Kh Khasimov, M. S. Melnikova, I. A. Doronin, R. G. Vasilov
Summary: The C-terminal domain of the HydS subunit of HydSL hydrogenase plays an important role in electron transfer with the transmembrane protein Isp1, and a simple method for immobilizing the hydrogenase on a hydrophobic carbon electrode has been developed. The resulting electrodes demonstrated high power and current in a fuel cell and maintained stability over a period of 49 days.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Multidisciplinary
Nicole L. D. Sui, Jong-Min Lee
Summary: Janus architectures have shown outstanding advances in electrocatalysis due to their anisotropy and compartmentalized structure, allowing various co-existing electrochemical properties and retaining the inherent activity of each functional domain. With growing interest in Janus architectures for electrocatalysis, it is crucial to investigate and reconsider their design strategies and future directions.
Review
Chemistry, Physical
Mohammad Hasibul Hasan, Ian T. McCrum
Summary: This article discusses the quantitative understanding of the effects of near-surface solvent on predictive catalyst and electrode design through the direct comparison between ab initio computational modeling and experimental measurements. It also provides a benchmark for different approximations and suggests improved modeling methodologies.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Electrochemistry
Isaac Kretzmer, Eric M. Stuve
Summary: In this study, the electrocatalytic properties of nickel-chromium-molybdenum (NiCrMo) alloys in alkaline electrolyte were found to be influenced by the Cr:Mo ratio. Alloys with dissimilar ratios exhibited higher electrochemical surface area and increased γ-NiOOH formation, while alloys with equal Cr:Mo concentration and pure nickel developed primarily β-NiOOH surfaces and showed higher turnover frequencies (TOF). This suggests that a β-NiOOH-developed surface is more OER-active than a γ-NiOOH-developed surface, pointing to the potential of certain NiCrMo alloys as OER electrocatalysts.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Review
Chemistry, Physical
Vignesh Kumaravel, John Bartlett, Suresh C. Pillai
Summary: Recent fire accidents in the electronics and electric vehicles industries have highlighted the importance of addressing thermal runaway reactions, where solid electrolytes play a crucial role in mitigating these issues and prolonging the lifecycle of energy storage devices. Solid electrolytes, such as ceramic polymer nanocomposites, hydrogels, and ionogels, offer solutions for high-temperature stability and flexibility, making them suitable for various applications in next-generation EVs, space devices, aviation gadgets, defense tools, and mobile electronics.
ADVANCED ENERGY MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Dylan G. Boucher, Emily Carroll, Zachary A. Nguyen, Rohit G. Jadhav, Olja Simoska, Kevin Beaver, Shelley D. Minteer
Summary: Bioelectrocatalytic synthesis involves the conversion of electrical energy into valuable products using biocatalysts, combining the specificity of biocatalysis with energy-related electrocatalysis. This review provides an introduction to key concepts in bioelectrosynthetic systems, including methods of biocatalyst utilization, setup of bioelectrosynthetic cells, and analytical methods for assessing bioelectrocatalysts. It outlines important applications in ammonia production and small-molecule synthesis for enzymatic and microbial systems, serving as a valuable resource for non-specialists interested in bioelectrosynthetic research.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Yu Liu, Linlin Qin, Yiming Qin, Tong Yang, Haoran Lu, Yulong Liu, Qiqi Zhang, Wenyan Liang
Summary: Co/NC/PAC electrode was prepared by compounding ZIF-67 with powder-activated carbon for the electrocatalytic treatment of nitrogen-containing heterocyclic compounds. The degradation efficiency of the four compounds reached 90.2-93.7% under optimal conditions, and the degradation order was pyridazine < pyrimidine < pyrazine < pyridine.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Chemistry, Analytical
Henry O. Lloyd-Laney, Martin J. Robinson, Alan M. Bond, Alison Parkin, David J. Gavaghan
Summary: Dispersion of kinetic and thermodynamic parameters in redox reactions has long been recognized as a complicating factor in voltammetry analysis. This paper explores how dispersion affects the appearance of experimental current and discusses the importance of making informed choices about including dispersion in simulating voltammetry experiments. Three voltammetric techniques are focused on to illustrate the impact of dispersion parameters on resulting current appearance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Peter J. Lindley, Alison Parkin, Gideon J. Davies, Paul H. Walton
Summary: The active site of the polysaccharide-degrading lytic polysaccharide monooxygenase (LPMO) enzyme can exist in three different protonation states, with pH values of 8.7, approximately 11.5, and >12. The highest pH species is unlikely to be biologically relevant in the catalytic cycle of AA10 LPMOs.
FARADAY DISCUSSIONS
(2022)
Article
Chemistry, Analytical
Henry O. Lloyd-Laney, Martin J. Robinson, Alison Parkin, David J. Gavaghan
Summary: This paper simulates voltammetry data for a purely Faradaic surface-confined redox process using predefined parameter values, and attempts to recover these values in the presence of varying amounts of synthetically-added noise using both heuristic methods and a Bayesian inference approach. The results show that the Bayesian approach achieves equal or greater accuracy in recovering the true parameter values compared to the heuristic approach, depending on the form of the data analyzed. The loss of accuracy in the heuristic case is primarily caused by discarding large amounts of data during the feature-extraction process.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Natalia G. Baranska, Alison Parkin, Anne -K. Duhme-Klair
Summary: We report the electrochemical study of iron(III) catecholate siderophores using a boron-doped diamond working electrode. Our results reveal the formation of coordinatively unsaturated tetracoordinate complexes of iron(III) azotochelin, contrary to other siderophore complexes which favor hexacoordinate environment. The reduction potential of iron(III) azotochelin shows notable pH and buffer composition dependence. The study also extends to the investigation of iron(III) hexadentate siderophores.
INORGANIC CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Wendy X. Q. Robinson, Tamara Mielke, Benjamin Melling, Anibal Cuetos, Alison Parkin, William P. P. Unsworth, Jared Cartwright, Gideon Grogan
Summary: Unspecific peroxygenases (UPOs) are valuable tools for oxygenation of non-activated carbon atoms with high turnovers and good stability, depending on hydrogen peroxide as the only oxidant for activity. However, isolating UPOs from natural fungal sources remains a barrier. In this study, an 'artificial' peroxygenase (artUPO) was cloned and expressed in yeast and E. coli, and its catalytic and structural characteristics were compared to those produced in each system. The results showed similar catalytic efficiencies, with the glycosylated enzyme displaying greater stability. Interestingly, artUPO exhibited opposite series of sulfoxide products, expanding the application scope of UPOs.
Article
Chemistry, Physical
Ting Chen, Philip A. Ash, Lance C. Seefeldt, Kylie A. Vincent
Summary: Nitrogenases catalyze the reduction of dinitrogen to ammonia through multiple redox and protonation levels. The redox potentials of the MoFe protein in nitrogenase have been challenging to determine due to its complex electron-transfer pathway. In this study, electrochemical control and various analytical methods were employed to investigate the potentials associated with inhibitor binding and catalytic transformation by nitrogenase. The findings provide insight into the elusive mechanism of biological nitrogen fixation.
FARADAY DISCUSSIONS
(2023)
Article
Biochemistry & Molecular Biology
Lydia J. Barber, Nicholas D. J. Yates, Martin A. Fascione, Alison Parkin, Glyn R. Hemsworth, Paul G. Genever, Christopher D. Spicer
Summary: Protein N-termini offer unique reactive motifs for protein modification, but the selectivity, generality, and stability of the conjugates formed at this site have not been well studied. A comprehensive comparative study of the most promising methods for N-terminal protein modification reveals the need for reagent screening based on specific proteins or applications, and highlights the importance of continuous innovation and development in the field of bioconjugation.
RSC CHEMICAL BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Katrina S. Madden, Peter M. T. Todd, Kouji Urata, Angela J. Russell, Kylie A. Vincent, Holly A. Reeve
Summary: Barriers to the adoption of biocatalysis in early stage medicinal chemistry are addressed using ketone reduction as a model reaction. Commercial alcohol dehydrogenase enzymes show wide substrate scope and high tolerance to chemical groups commonly used in drug discovery. A preliminary predictive pharmacophore-based screening tool is developed using substrate screening data, demonstrating the potential for developing such tools for commercially available enzymes without publicly available structures.
BIOORGANIC & MEDICINAL CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Nicholas D. J. Yates, Natasha E. Hatton, Martin A. Fascione, Alison Parkin
Summary: This paper describes the synthesis of a novel maleimide-functionalized triazabutadiene suitable for site-selectively installing aryl diazonium cations into proteins at neutral pH. Through photoactivation of the site-selectively installed triazabutadiene motifs, we generate aryl diazonium functionality, which we further derivatize via azo-bond formation to electron-rich aryl species, showcasing the potential utility of this strategy for the generation of photoswitches or protein-drug conjugates.
Article
Chemistry, Analytical
Henry O. Lloyd-Laney, Nicholas D. J. Yates, Martin J. Robinson, Alice R. Hewson, Jessie Branch, Glyn R. Hemsworth, Alan M. Bond, Alison Parkin, David J. Gavaghan
Summary: This study introduces a semi-automated computational method for inferring chemical reaction parameters in a simple protein system, as well as a multiple-technique approach for analyzing data from different voltammetry techniques. This approach provides insights into the determination and correlation of redox reaction parameters in the experimental system, and also visualizes the possible limitations of the mathematical model.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Rhiannon M. Evans, Stephen E. Beaton, Patricia Rodriguez Macia, Yunjie Pang, Kin Long Wong, Leonie Kertess, William K. Myers, Ragnar Bjornsson, Philip A. Ash, Kylie A. Vincent, Stephen B. Carr, Fraser A. Armstrong
Summary: A variant of hydrogenase-2 from E. coli with a mutated arginine residue at its active site forms a tightly-bound diatomic ligand. This ligand is stabilized by hydrogen bonding and removal only occurs after reduction with H-2 and reduced methyl viologen. The R479K variant shows decreased rates in hydrogen oxidation and evolution compared to the native enzyme. Importance rating: 7/10.
Article
Chemistry, Multidisciplinary
Jack S. Rowbotham, Jake H. Nicholson, Miguel A. Ramirez, Kouji Urata, Peter M. T. Todd, Gogulan Karunanithy, Lars Lauterbach, Holly A. Reeve, Andrew J. Baldwin, Kylie A. Vincent
Summary: We demonstrated an efficient H-2-driven biocatalytic platform for selectively incorporating H-2 atoms into amino acids. By combining a biocatalytic deuteration catalyst with amino acid dehydrogenase enzymes, we synthesized multiply isotopically labeled amino acids from low-cost isotopic precursors without the need for pre-labeled reducing agents. This method allows for the introduction of H-2, N-15, and an asymmetric center in a single step with full selectivity and high atom efficiency.
Article
Chemistry, Physical
Solomon L. D. Wrathall, Barbara Procacci, Marius Horch, Emily Saxton, Chris Furlan, Julia Walton, Yvonne Rippers, James N. Blaza, Gregory M. Greetham, Michael Towrie, Anthony W. Parker, Jason Lynam, Alison Parkin, Neil T. Hunt
Summary: Ultrafast two-dimensional infrared spectroscopy was used to study the structural and dynamic influence of the protein scaffold on the Fe(CO)(CN)(2) unit of the active site of Escherichia coli Hyd-1 (EcHyd-1). New active site states were observed and assigned using 2D-IR, and the vibrational levels and relaxation dynamics of the CO and CN modes were determined. The results show that the protein scaffold creates a distinct biomolecular environment for the NiFe site that differs from simple models of solvation.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Holly A. Reeve, Jake Nicholson, Farieha Altaf, Thomas H. Lonsdale, Janina Preissler, Lars Lauterbach, Oliver Lenz, Silke Leimkuehler, Frank Hollmann, Caroline E. Paul, Kylie A. Vincent
Summary: We present a recycling system utilizing a soluble hydrogenase for synthetic nicotinamide cofactor analogues. With the coupling of an ene reductase, we achieved quantitative conversion of N-ethylmaleimide to N-ethylsuccinimide. The biocatalyst system retained over 50% activity after 7 hours.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xu Zhao, Sarah E. Cleary, Ceren Zor, Nicole Grobert, Holly A. Reeve, Kylie A. Vincent
Summary: Heterogeneous biocatalytic hydrogenation using metal catalysts and carbon supports for NADH recycling shows improved activity and selectivity in enantioselective C=X reduction reactions. By combining chemo- and biocatalysis on carbon supports, this method demonstrates a new way to efficiently produce bioactive NADH for high cofactor turnover numbers.
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)