Article
Chemistry, Analytical
Martin Perez-Estebanez, William Cheuquepan, Maria Huidobro, Jose Vicente Cuevas, Sheila Hernandez, Aranzazu Heras, Alvaro Colina
Summary: A novel methodology for quantitative analysis of Clopyralid has been developed using Electrochemical Surface Oxidation-Enhanced Raman Scattering (EC-SOERS). This method allows for the determination of Clopyralid in tap water without purification or preconcentration steps, with a short measurement time for each sample.
MICROCHEMICAL JOURNAL
(2022)
Article
Electrochemistry
Martin Perez-Estebanez, William Cheuquepan, Jose V. Cuevas-Vicario, Sheila Hernandez, Aranzazu Heras, Alvaro Colina
Summary: Time Resolved Raman spectroelectrochemistry (TR-Raman-SEC) was used for the first time to obtain two different Raman spectra of one single analyte in the same experiment, by combining electrochemical surface enhanced Raman scattering (EC-SERS) and electrochemical surface oxidation enhanced Raman scattering (EC-SOERS). This double detection method provides a broad insight into the interaction between analyte and substrate surface.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Analytical
David Ibanex, Maria Begon Gonzalez-Garcia, Javier Busto, Alejandro Perez-Junquera, David Hernandez-Santos, Pablo Fanjul-Bolado
Summary: This paper describes the design, assembly, and applications of a novel Raman spectroelectrochemical cell for conventional electrodes. The cell focuses the laser on the working electrode surface to obtain spectroscopic information related to electrochemical processes. The cell can be used in both aqueous and organic solvents, and has been validated through the study of various electrochemical systems. The new device also shows potential for developing new EC-SERS protocols in organic media.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
W. Cheuquepan, S. Hernandez, M. Perez-Estebanez, L. Romay, A. Heras, A. Colina
Summary: Electrochemistry can be used to generate SERS substrates, utilizing the plasmonic properties of nanos-tructures and the chemical mechanism, with time-resolved Raman spectroelectrochemistry providing valuable information. Comparing Au and Ag metals for folic acid detection in drugs, it was found that Ag SERS substrates outperformed Au SERS substrates in complex samples.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Sheila Hernandez, William Cheuquepan, Martin Perez-Estebanez, Aranzazu Heras, Alvaro Colina
Summary: Raman spectroscopy is a powerful analysis technique that is greatly enhanced with the use of Surface-Enhanced Raman scattering (SERS) and Electrochemical-Surface Oxidation Enhanced Raman Scattering (EC-SOERS). The electrogeneration of silver hexacyanoferrate (II) nanocrystals has been developed as a new EC-SOERS substrate, which offers a highly sensitive Raman response. This new material can be easily monitored using spectroelectrochemistry, allowing for the detection of target molecules at nanomolar levels.
ELECTROCHIMICA ACTA
(2023)
Review
Chemistry, Analytical
Rebeca Moldovan, Elizaveta Vereshchagina, Karolina Milenko, Bogdan-Cezar Iacob, Andreea Elena Bodoki, Alexandra Falamas, Nicoleta Tosa, Cristina M. Muntean, Cosmin Farca, Ede Bodoki
Summary: The discovery of surface enhanced Raman scattering (SERS) from an electrochemical (EC)-SERS experiment is a historic breakthrough that has led to the development of Raman spectroelectrochemistry (SEC) as a common characterization tool. Recent studies have shown that EC-SERS sensors have great potential to be used as miniaturized devices for point-of-need (PON) analyses, and they can revolutionize fields such as quality control, diagnosis, and environmental and food safety. Raman spectroelectrochemistry has become a promising alternative to conventional analytical methods and has attracted increasing interest from researchers.
ANALYTICA CHIMICA ACTA
(2022)
Article
Biochemistry & Molecular Biology
Janet Ocampo-Hernandez, Jose de Jesus Gomez-Guzman, Marisela Cruz-Ramirez, Juan Pablo F Rebolledo-Chavez, Angel Mendoza, Rafael Moreno-Esparza, Luis Ortiz-Frade
Summary: In this study, we investigated the interaction between a model complex [Cu-iota iota(Bztpen)](2+) and transport proteins, such as Bovine Serum Albumin (BSA), using electrochemical, spectroscopic and spectro-electrochemical methods. The results showed a weak interaction between the copper complex and BSA, with no adsorption of the protein on the electrode surface.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Andrey A. Buglak, Alexei I. Kononov
Summary: The interaction between tyrosine and silver nanoclusters plays a crucial role in the detection of tyrosine. Silver nanoclusters can be used for colorimetric, fluorescent, and Raman spectroscopy detection of tyrosine.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Analytical
Sheila Hernandez, Lydia Garcia, Martin Perez-Estebanez, William Cheuquepan, Aranzazu Heras, Alvaro Colina
Summary: A new, simple and fast protocol using time-resolved Raman spectroelectrochemistry to generate gold-based SERS substrates and detect melamine is presented in this work. The protocol shows significant figures of merit in a very short experiment time and provides valuable information about the interaction between the molecule and the generated substrate.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Govinda Ghimire, Jing Guo, Robert Halmagian, Jin He
Summary: In this study, tunable, reliable, and efficient copper nanoelectrodes (CuNEs) were successfully fabricated, and the reversible chemical transformations between aromatic amine and nitro groups on the CuNE surface were comprehensively studied using time-resolved electrochemical surface-enhanced Raman spectroscopy. It was found that the plasmon-mediated chemical reactions (PMCRs) of CuNEs could be well-controlled by changing the surface roughness, oxidation states of copper, and the applied electrode potential. This study demonstrates the importance of Cu nanostructures in investigations of the interplays between PMCR, electrochemistry, and Cu catalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Analytical
Jerson Gonzalez-Hernandez, Colby Edward Ott, Maria Julia Arcos-Martinez, Alvaro Colina, Aranzazu Heras, Ana Lorena Alvarado-Gamez, Roberto Urcuyo, Luis E. Arroyo-Mora
Summary: This study explores the spectroelectrochemical response of synthetic cathinones using cyclic voltammetry and Raman spectroscopy for the first time. The proposed method allows for rapid and reliable determination of these substances, making it applicable for forensic analysis of real drug samples and spiked synthetic urine.
Article
Electrochemistry
Christopher D. Bandas, Ryan T. Rooney, Andreas Kirbs, Cornelia Jaeger, Ralf Schmidt, Andrew A. Gewirth
Summary: The presence of amine-based levelers affects the catalytic function of the accelerator at the Cu-electrolyte interface, with perturbed conformation of SPS induced by the levelers diminishing its activity and limiting direct contact with the surface. Additionally, decreased coverages of adsorbed chloride and SPS contribute to the deactivation of the accelerative effect of SPS. The incorporation of S, Cl, and C content in Cu electrodeposited in the presence of PEI, SPS, and Cl- indicates the co-incorporation of these additives, mitigating SPS acceleration.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Jiaqi Liu, Zhichao Liu, Weikang Wang, Yang Tian
Summary: A novel SERS probe CuSP was created for real-time tracking and accurate quantification of extracellular Cu+ and Cu2+ concentrations in the live brain. The CuSP probe demonstrated specific ability for recognition of Cu+ and Cu2+ in a dual-recognition mode.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Alexey Skvortsov, Ekaterina Babich, Andrey Lipovskii, Alexey Redkov, Guang Yang, Valentina Zhurikhina
Summary: We studied the surface-enhanced Raman spectra of amino acids, D-alanine and DL-serine, and their mixture on a silver nanoisland film immersed in phosphate-buffered saline solution. The results showed that the spectra from the amino acid solutions differed from the reference spectra for microcrystallites due to the electrostatic orientation of amino acid zwitterions by the metal nanoisland film. Moreover, non-additive peaks were observed in the spectrum of the mixture of amino acids adsorbed on the nanoisland film, indicating significant intermolecular interactions.
Article
Chemistry, Analytical
Lizhen Zhao, Yuling Hu, Gongke Li, Seyin Zou, Liansheng Ling
Summary: In this study, a novel SERS platform for detecting cTnI was designed using a chemical-chemical redox cycle and dual ratiometric immunoassay. The method showed high sensitivity and reproducibility, making it a promising approach for early diagnosis of cardiovascular diseases and sensitive detection of bioactive molecules.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Tatiana M. Pessanha, Waldemir J. Paschoalino, Patricia B. Deroco, Sergio Kogikoski, Ana C. M. De Moraes, Cecilia Carvalho Castro Silva, Lauro T. Kubota
Summary: The research focuses on the understanding of bidimensional materials dynamics and its interface equilibrium in electrolyte, particularly graphene oxide (GO), as key for capacitive biosensors development. By tuning the interfacial capacitance (Ci) of graphene-based materials through experimental conditions like pH optimization and cation size, their applicability as novel capacitive biosensors is enhanced. The study demonstrated that the presence of ionizable oxygen-containing functional groups within multilayer GO film enhances the interfacial capacitance and the mobility and interaction with different cations also affects the Ci, showing potential for capacitive GO based sensors in label-free biosensing applications.
Article
Nanoscience & Nanotechnology
Julia A. Barbosa, Vitoria M. S. Freitas, Lourenco H. B. Vidotto, Gabriel R. Schleder, Ricardo A. G. de Oliveira, Jaqueline F. da Rocha, Lauro T. Kubota, Luis C. S. Vieira, Helio C. N. Tolentino, Itamar T. Neckel, Angelo L. Gobbi, Murilo Santhiago, Renato S. Lim
Summary: Impedimetric wearable sensors can quantitatively measure the cellular water content of leaves, which is important for precision agriculture, toxicity studies, and agricultural input development. However, challenges such as leaf adhesion, compatibility, scalability, and reproducibility hinder long-term measurements. This paper presents solutions that overcome these obstacles, enabling reproducible determination of the water content in soy leaves using mass-produced electrodes made of nickel films or pyrolyzed paper.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Analytical
Patricia Batista Deroco, Dagwin Wachholz Junior, Lauro Tatsuo Kubota
Summary: In recent years, electrochemical wearable sensors have gained significant attention for their potential applications in point-of-care testing due to their high sensitivity, simplicity, miniaturization, and low cost. New fabrication approaches and innovative substrates have enabled real-time and on-body measurements. These sensors have also been combined with paper-based substrates for non-invasive analyses. Additionally, they allow monitoring of analytes in different biofluids without complex procedures. The integration of IoT with wearable sensors has attracted interest for real-time data collection in resource-limited conditions. This mini-review highlights the advancements in wearable electrochemical devices and discusses challenges for higher performance.
Article
Spectroscopy
Maria Sole Zalaffi, Paolo Ugo, Almudena Marti, Bethany M. Bowden, Andrea E. Russell, Philip N. Bartlett
Summary: Particle in cavity nanostructures were produced by sedimentation of silver nanostars onto sphere segment void (SSV) cavity structures. These nanostructures showed higher enhancement factors in SERS and were found to be promising substrates for highly sensitive detection of dyes and cochineal lake pigment.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Dagwin Wachholz Junior, Patricia Batista Deroco, Lauro Tatsuo Kubota
Summary: An electrochemical device using copper-based metalorganic frameworks (MOF) and reduced graphene oxide was developed to improve charge transfer, stability, and adherence of structures on electrode surfaces. This device was successfully applied to electrochemical detection of paraquat pesticide with high sensitivity in standard solutions.
Article
Biochemistry & Molecular Biology
Fernanda M. R. Lima, Alan S. de Menezes, Adeilton P. Maciel, Francisco S. M. Sinfronio, Lauro T. Kubota, Flavio S. Damos, Rita C. S. Luz
Summary: Cardiovascular diseases are a major cause of premature mortality worldwide. Rapid diagnosis is crucial to ensure patient survival. In this study, a photoelectrochemical immunosensor was developed for the detection of myoglobin, a biomarker for acute myocardial infarction. The immunosensor showed high sensitivity and accuracy, making it a potentially valuable tool for rapid diagnosis of cardiovascular diseases.
Article
Electrochemistry
A. G. Wallace, R. P. King, N. Zhelev, A. H. Jaafar, W. Levason, R. Huang, G. Reid, P. N. Bartlett
Summary: In this paper, the use of Na-3[SbS4].9H(2)O as a single source precursor for the electrodeposition of Sb2S3 is reported. The study shows that high-quality crystalline films of Sb2S3 can be obtained by suitable pulse plating approach, and these films exhibit promising potential for application in Resistive Random-Access Memory.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Alexander W. Black, Wenjian Zhang, Gillian Reid, Philip N. Bartlett
Summary: This study investigated diffusion in weakly coordinating solvents using electrochemical measurements. The diffusion coefficients were measured and compared with theoretical upper and lower bounds. The results showed that the charged metallocene species had larger particle size than expected, highlighting the importance of considering modifications to the Stokes-Einstein equation.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Tatjana Safarik, Aleksandar Karajic, Stephane Reculusa, Philip N. Bartlett, Nicolas Mano, Alexander Kuhn
Summary: This study reports the electrochemical elaboration and characterization of a 3D coaxial macroporous twin-electrode, which is obtained by a low-cost bottom-up approach using nanoengineered highly organized porous material. The resulting electrode architecture allows for signal amplification in electroanalytical measurements and has potential applications in various (bio)electroanalytical fields.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ayoub H. Jaafar, Lingcong Meng, Tongjun Zhang, Dongkai Guo, Daniel Newbrook, Wenjian Zhang, Gillian Reid, C. H. de Groot, Philip N. Bartlett, Ruomeng Huang
Summary: We report the development of flexible memristor devices based on hybrid organic-inorganic materials using a fast and simple electrochemical fabrication method. These devices exhibit reliable and reproducible bipolar resistive switching at low voltages without the need for an electroforming process. Multistate switching behavior can also be achieved by controlling the compliance current.
ACS APPLIED NANO MATERIALS
(2022)
Article
Electrochemistry
D. A. Cook, S. J. Reeves, W. Zhang, G. Reid, W. Levason, P. N. Bartlett, J. M. Dyke, V. K. Greenacre
Summary: Electrodeposition of elemental Te from [NnBu4]2[TeCl6] in dichloromethane was studied. It was found that reduction of the Te(IV) complex to deposit Te requires a large overpotential, which is significantly reduced once Te is deposited on the electrode. This overpotential arises due to the instability of the intermediate Te(III) species. Density functional theory calculations confirmed the instability of possible Te(III) complexes, and a catalytic mechanism involving Lewis acid/base adduct formation at the electrode surface was proposed to overcome this thermodynamic barrier.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Junren Wang, Huimian Zhong, Bowen Liu, Min Zhang, Andrew L. Hector, Andrea e E. Russell
Summary: A self-standing three-dimensional TiC-modified carbon fibre network is fabricated via carbothermal reduction, which provides a solution for the problems of Li dendrite formation, large volume expansion, and unstable solid electrolyte interface films in lithium metal batteries. The lithiophilic TiC promotes homogeneous and rapid Li deposition, while the 3D conductive structures with high surface area reduce local current density and accommodate volume changes. The TiC@C electrode shows a nearly zero Li nucleation overpotential and low voltage hysteresis, achieving a coulombic efficiency of 99.6% over 200 cycles and an impressive capacity retention of 87% over 250 cycles in full cells with LiFePO4 cathode.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Bingjia Yan, Peter N. Horton, Simon C. Weston, Christopher J. Wedge, Andrea E. Russell, Martin C. Grossel
Summary: The solid-state behavior of five ionophore-encapsulated TCNQ complexes has been investigated. Different arrangements of TCNQ columns and crown ether complexes were observed, resulting in one-dimensional structures with varying conductivities. The presence of partially charged TCNQ units was confirmed in all five complexes, and the resistivity of the TCNQ complexes was found to be higher than that of simple KTCNQ salts.
Article
Engineering, Electrical & Electronic
Rodrigo S. N. Mancini, Amanda E. Sabaine, Carlos E. Castro, Juliana B. T. Carnielli, Reynaldo Dietze, Vivian L. de Oliveira, Alexandre J. C. Lanfredi, Lauro T. Kubota, Monica B. Mamian-Lopez, Wendel A. Alves
Summary: A fast and reliable antibody detection method for leishmaniasis was developed using citrate-capped gold nanoparticles conjugated with an immunogenic peptide. The method allows for indirect detection of the disease through surface-enhanced Raman scattering, showing potential for diagnosing this neglected tropical disease.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Review
Chemistry, Analytical
Patricia Batista Deroco, Dagwin Wachholz Junior, Lauro Tatsuo Kubota
Summary: In recent years, electrochemical wearable sensors have gained significant attention due to their high sensitivity, simplicity, and low cost. These sensors, coupled with innovative substrates and paper-based substrates, allow real-time and on-body measurements and non-invasive analysis of biofluids. The integration of IoT technology enables remote data collection and processing. The use of paper as an intelligent substrate for electrochemical wearable sensors has advantages and drawbacks. Future advancements in wearable sensors include multiplexed detection of biomarkers, reducing analysis time and cost, and providing comprehensive physiological analysis to the wearer.
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)
