Article
Chemistry, Analytical
Silvina V. Kergaravat, Silvia N. Fabiano, Adriana R. Soutullo, Silvia R. Hernandez
Summary: Glyphosate is the most widely used herbicide in Argentina, and there is controversy surrounding its safety. Two electrochemical screening methods based on horseradish peroxidase (HRP) inhibition have been developed for glyphosate detection.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Yacob Melman, Paulina K. Wells, Evgeny Katz, Oleh Smutok
Summary: A nanostructured surface was used as a platform to immobilize NAD(+)-dependent enzymes for fluorescent analysis of substrates. The signal was obtained by processing fluorescent images using a smartphone. This system has potential applications in various fields including biomedical, forensic, homeland security, and environmental monitoring.
Article
Chemistry, Analytical
Paulina K. Wells, Oleh Smutok, Zhong Guo, Kirill Alexandrov, Evgeny Katz
Summary: Protein biosensors based on artificial allosteric alpha-amylase-activated PQQ-dependent glucose dehydrogenase (Amy-GDH) were constructed, allowing quantification of biomarkers outside of the laboratory environment. The biosensor arrays demonstrated high sensitivity with an apparent Kd of 115 pM for alpha-amylase and a detection limit of 2 pM. This approach enables specific and accurate measurement of alpha-amylase concentration in biological fluids, suggesting its potential for ultrasensitive point-of-care diagnostics.
Article
Nanoscience & Nanotechnology
Zahra Panahi, Tianyu Ren, Jeffrey Mark Halpern
Summary: The aim of this study is to develop a reusable PPG:beta CD biosensor for cortisol detection. The stability and reusability of two different surfaces were evaluated, and sensitive detection of cortisol was achieved in various samples.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Bulent Caglar, Fatih Icer, Kemal Volkan Ozdokur, Sema Caglar, Agah Oktay Ozdemir, Eda Keles Guner, Burcu Meryem Beser, Ahmet Altay, Cagri Cirak, Bilge Dogan, Ahmet Tabak
Summary: Ferromagnetic BiFeO3 nanoparticles were synthesized with a rhombohedral distorted perovskite structure, characterized comprehensively, and used to develop a novel H2O2 biosensor with excellent linear response, detection and quantification limits, reproducibility, and stability. The biosensor was successfully applied for the analysis of H2O2 in milk samples with satisfactory recovery rates.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Biotechnology & Applied Microbiology
Celica Cagide, Juan Jose Marizcurrena, Diego Valles, Beatriz Alvarez, Susana Castro-Sowinski
Summary: In this study, a dyp gene encoding a class B DyP enzyme was identified in an Antarctic cold-tolerant microbe. The recombinant protein showed high activity at low temperatures and exhibited characteristics of psychrophilic enzymes. It also demonstrated the ability to decolorize dyes and modify kraft lignin, suggesting its potential applications in bioremediation and the cellulose and biofuel industries.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2023)
Article
Optics
Yi-Ru Li, Kuang-Li Lee, Kuan-Ming Chen, Yun Cheng Lu, Pin Chieh Wu, Sy-Hann Chen, Jiun-Haw Lee, Pei-Kuen Wei
Summary: This paper proposes a measurement method for sensitive and label-free detection of virus-like particles (VLPs) using color images of nanoplasmonic sensing chips. The experimental results show that the image contrast method has good linearity and can achieve direct detection of SARS-CoV-2 VLPs in a short period of time.
Review
Chemistry, Multidisciplinary
Yunlong Qin, Yu Ouyang, Itamar Willner
Summary: Nanozymes are nanoparticles that can catalyze reactions by mimicking the functions of native enzymes. Recently, they have gained significant attention for their various applications in analytics and medicine. However, their catalytic activities are limited due to the lack of substrate binding sites. Functional nucleic acid modification provides a solution to enhance their catalytic activities and create hybrid structures for diverse applications.
Article
Chemistry, Analytical
Yuri D. Ivanov, Vadim Y. Tatur, Ivan D. Shumov, Andrey F. Kozlov, Anastasia A. Valueva, Irina A. Ivanova, Maria O. Ershova, Nina D. Ivanova, Igor N. Stepanov, Andrei A. Lukyanitsa, Vadim S. Ziborov
Summary: This study investigates the effects of an electromagnetic field induced by a rotating metallic cone on the properties of horseradish peroxidase (HRP) enzyme. Atomic force microscopy and spectrophotometry are used to analyze the enzyme at both molecular and macroscopic levels. The results show that the rotation of the cone causes the disaggregation and formation of higher-order aggregates of the enzyme, without affecting its enzymatic activity. These findings have implications for the development and interpretation of enzyme-based biosensors with rotating elements.
Article
Chemistry, Analytical
Zhijun Huang, Xiaoting Li, Yanting Feng, Yonghui Tian, Yixiang Duan
Summary: A simple visual assay for the detection of bacteria in large-volume samples was developed, which showed reasonable sensitivity and specificity. The assay utilized a composite filter membrane with a hydrophobic layer and adjustable interception area to filter the sample and confine the bacteria to a small detection area. The naked eye could easily identify samples containing more than 20 Staphylococcus aureus cells within 30 minutes.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Review
Chemistry, Multidisciplinary
Yunlong Qin, Yu Ouyang, Itamar Willner
Summary: Nanozymes are nanoparticles that mimic the catalytic functions of native enzymes and have attracted scientific interest for various applications. However, their catalytic activities and functions are limited due to the lack of substrate binding sites. By modifying nanozymes with functional nucleic acids, these limitations can be overcome and hybrid nanozymes can be engineered for diverse applications. The modification allows for enhanced catalytic activities and the development of targeted bioreactors for cascaded catalysis or cancer treatment. Furthermore, nucleic acid-modified nanozymes can serve as sensors, catalysts, switches, and bioreactor systems for nano-biomedical applications.
Article
Chemistry, Multidisciplinary
Weiwei Wu, Liang Huang, Xinyang Zhu, Jinxing Chen, Daiyong Chao, Minghua Li, Shuangli Wu, Shaojun Dong
Summary: This article investigates the inhibitory effect of nanozymes and the advantages of single-atom Fe-N-C nanozymes in mechanism research. The study finds that a common analgesic-antipyretic drug inhibits the oxidase-like activity of Fe-SANs in a reversible mixed-inhibition manner. Additionally, a calorimetric method for drug detection based on nanozyme inhibition is proposed.
Article
Chemistry, Physical
Jose Luis Olloqui-Sariego, Juan Jose Calvente, Rafael Andreu
Summary: Three key challenges driving intensive research in productive direct electron transfer mode enzyme electrodes include proper enzyme orientation, high enzyme loading, and full retention of enzyme activity. Significant advances in designing mesoporous and nanostructured electrodes as enzyme scaffolds, and innovative methodologies for wiring enzymes to electrodes have been summarized in this review. Focus on physical factors determining favorable enzyme immobilization provides rational guidelines for productive enzymatic electrode design, with emerging trends addressing the spatial organization of single enzymes or enzyme cascades briefly discussed.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Chemistry, Analytical
Yacob Melman, Evgeny Katz, Oleh Smutok
Summary: This research describes the construction of a new L-phenylalanine biosensor system based on smartphone-adapted analysis of the fluorescence output. The developed biosensor is sensitive, selective, cheap, and simple to use, making it promising for routine analysis of L-phenylalanine.
MICROCHEMICAL JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
M. A. Khaleque, M. I. Hossain, M. R. Ali, M. S. Bacchu, M. Aly Saad Aly, M. Z. H. Khan
Summary: In recent years, there has been a rapid increase in demand for wearable sensors, particularly those tracking the surroundings, fitness, and health of people. This review surveys the latest research on nanostructured wearable electrochemical and biosensors, aiming to help researchers and engineers choose suitable sensors. Wearable sensors, such as contact lenses, Google Glass, and skin-patch, have broad sensing platforms. Improvements in sensor reliability, precision, stability, and sample conveyance are necessary. The future of wearable electrochemical sensors in healthcare and well-being fields is discussed, highlighting their potential impact on daily lives.
Article
Nanoscience & Nanotechnology
Gema Vivo-Llorca, Angela Morella-Aucejo, Alba Garcia-Fernandez, Paula Diez, Antoni Llopis-Lorente, Mar Orzaez, Ramon Martinez-Manez
Summary: In this study, a novel nanodevice based on enzyme-functionalized gold nanoparticles for enzyme prodrug therapy (EPT) in breast cancer was designed and evaluated. The results showed that the nanodevice was effectively internalized by breast cancer cells and co-treatment with the nanodevice and enzyme prodrug significantly reduced the viability of breast cancer cells. The findings from three-dimensional tumor models also demonstrated the therapeutic effectiveness of this nanodevice.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2022)
Article
Chemistry, Analytical
Marina Blazquez-Garcia, Beatriz Arevalo, Veronica Seraffin, Sara Benede, Luis Mata, Patricia Galan-Malo, Isabel Segura-Gil, Maria Dolores Perez, Jose M. Pingarron, Susana Campuzano
Summary: This study developed the first electrochemical bioplatform for detecting soy traces in food. The bioplatform utilizes specific antibodies and magnetic microbeads to perform sandwich-type immunoassays. The electrochemical detection method showed good selectivity and sensitivity, with a short detection time and accurate results comparable to ELISA methodologies.
Article
Materials Science, Multidisciplinary
Susana Campuzano, Maria Pedrero, Rodrigo Barderas, Jose M. Pingarron
Summary: Electrochemical biosensors are rapidly advancing in terms of sensitivity, selectivity, simplicity, response time, and antifouling ability, thanks to the design and development of nanostructured or multifunctional nucleic acid or peptide biomaterials. This perspective article critically discusses and overviews the recent progress in electrochemical biosensors involving these biomaterials, providing insights into potential and opportunities. The challenges and future directions are also highlighted.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Analytical
Anabel Villalonga, Alfredo Sanchez, Diana Vilela, Beatriz Mayol, Paloma Martinez-Ruiz, Reynaldo Villalonga
Summary: Novel Janus nanoparticles based on polyamidoamine dendrons modified Au colloids were prepared. The nanoparticles were functionalized with horseradish peroxidase on one side and with a ssDNA aptamer for CRP on the other side. These nanoparticles were used as biorecognition/signaling elements to construct an amperometric aptasensor for specific detection of the cardiac biomarker.
Article
Chemistry, Analytical
Sara Guerrero, Esther Sanchez-Tirado, Lourdes Agui, Araceli Gonzalez-Cortes, Paloma Yanez-Sedeno, Jose M. Pingarron
Summary: This paper reports an electrochemical immunoplatform for rapid detection of CCL5 chemokine in multiple sclerosis patients, showing excellent analytical performance and low detection limit.
Review
Chemistry, Analytical
Esther Sanchez-Tirado, Lourdes Agui, Araceli Gonzalez-Cortes, Paloma Yanez-Sedeno, Jose M. Pingarron
Summary: Chemokines are a unique class of cytokines that play a significant role in various diseases and can be used as biomarkers for diagnosis and monitoring. However, there is a lack of biodetection techniques specifically designed for the selective determination of chemokines. The development of biosensor technology for chemokines could address the challenges in detecting diseases with high incidence, resulting in cost-effective and sensitive detection methods.
Article
Chemistry, Analytical
Shipeng Gao, Rebeca M. Torrente-Rodriguez, Maria Pedrero, Jose M. Pingarron, Susana Campuzano, Javier Rocha-Martin, Jose M. Guisan
Summary: This work focuses on improving the performance of immunosensors by studying the conjugation of magnetic nanoparticles (MNPs) with antibodies. By using suitable linkers and manipulation of oxidation variables, stable antibody-MNP conjugates were prepared with optimal analytical performance. The study also found that polyaldehyde-dextrans were superior to polycarboxylated-dextrans as multivalent antibody crosslinkers, and immunosensors constructed with carboxylated magnetic microbeads outperformed MNPs-based immunoplatforms.
Article
Biochemical Research Methods
Cristina Munoz-San Martin, Ana Montero-Calle, Maria Garranzo-Asensio, Maria Gamella, Victor Perez-Gines, Maria Pedrero, Jose M. Pingarron, Rodrigo Barderas, Noemi de-los-Santos-Alvarez, Maria Jesus Lobo-Castanon, Susana Campuzano
Summary: This work presents the first bioelectronic immunoplatforms for determining glycosylated haptoglobin (Hp) and both total and glycosylated Hp simultaneously. The immunoplatforms use non-competitive bioassays and magnetic microcarriers labeled with horseradish peroxidase (HRP) for detection. The method allows accurate determination of total and glycosylated Hp in colorectal cancer (CRC) cells, which is not possible with commercial ELISA kits and Western blot methodology due to lack of sensitivity.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Review
Chemistry, Analytical
Esther Sanchez-Tirado, Lourdes Agui, Araceli Gonzalez-Cortes, Susana Campuzano, Paloma Yanez-Sedeno, Jose Manuel Pingarron
Summary: The study of the human microbiome is a multidisciplinary field that holds great potential for improving disease diagnosis and monitoring using microbiota biomarkers. Electrochemical biosensors, with their high sensitivity and fast response, combined with advancements in nanomaterials, offer unique tools for understanding the human microbiome and driving future developments. This review article focuses on the application of electrochemical (bio)sensors for monitoring microbial metabolites and disease biomarkers in the gastrointestinal microbiome, discussing challenges and future directions.
Article
Oncology
Ana Montero-Calle, Maria Garranzo-Asensio, Rebeca M. Torrente-Rodriguez, Victor Ruiz-Valdepenas Montiel, Carmen Poves, Jana Dziakova, Rodrigo Sanz, Cristina Diaz del Arco, Jose Manuel Pingarron, Maria Jesus Fernandez-Acenero, Susana Campuzano, Rodrigo Barderas
Summary: The study aimed to assess whether p53 and p63 proteoforms derived from alternative splicing could have a differential seroreactivity and higher diagnostic value than canonical proteins in colorectal cancer. The researchers demonstrated the appearance of a differential seroreactivity among the proteoforms in colorectal cancer patients. These findings reveal increased complexity of the humoral immune response in cancer and highlight the potential for developing a blood-based biomarker signature for colorectal cancer detection.
Article
Chemistry, Analytical
Esther Sanchez-Tirado, Lourdes Agui, Marta Sanchez-Paniagua, Araceli Gonzalez-Cortes, Beatriz Lopez-Ruiz, Paloma Yanez-Sedeno, Jose M. Pingarron
Summary: In this study, an electrochemical immunoplatform was developed and applied for the simultaneous detection of four biomarkers for rheumatoid arthritis. Magnetic beads were used to immobilize specific antigens, and sandwich-type immunoassays were employed for the detection of the biomarkers. The results were validated against ELISA tests and certified values.
Review
Chemistry, Analytical
Esther Sanchez-Tirado, Paloma Yanez-Sedeno, Jose Manuel Pingarron
Summary: Natural enzymes are used as special reagents in the preparation of electrochemical (bio)sensors, but their practical applications are limited due to certain drawbacks. Artificial enzymes based on nanomaterials, known as nanozymes, have been developed as an alternative, providing enhanced stability, low cost, easy production, and rapid activity. Among nanozymes, carbon-based nanozymes have been widely used in the preparation of electrochemical (bio)sensors due to their stable activity, tunability, and good biocompatibility.
Review
Chemistry, Multidisciplinary
Susana Campuzano, Jose M. Pingarron
Summary: Electrochemical affinity biosensors are rapidly evolving and becoming increasingly important in our daily lives. They combine their intrinsic attributes with advances in technology to offer a wide range of opportunities and applications. This perspective provides an updated and critical view of these biosensors and discusses the challenges and future directions they face.
Article
Materials Science, Biomaterials
Beatriz Mayol, Ana Rodriguez, Anabel Villalonga, Carlos Anillo, Diana Vilela, Alfredo Sanchez, Paloma Martinez-Ruiz, Reynaldo Villalonga
Summary: The design of a novel particle-to-particle intercommunicated nanosystem for dual delivery is described in this study. The nanosystem consists of an Au-mesoporous silica Janus nanoparticle loaded with paracetamol and mechanized with light-sensitive supramolecular gates, as well as a mesoporous silica nanoparticle loaded with rhodamine B and gated with thiol-sensitive ensembles. Upon irradiation with a near-UV light laser, the analgesic drug is released from the Janus nanomachine, while the addition of N-acetylthiocholine leads to the enzymatic production of thiocholine, causing the disruption of the gating mechanism at the second mesoporous silica nanoparticle and subsequent dye release.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Materials Science, Biomaterials
Beatriz Mayol, Victor Dato, Manuel Rodriguez, Elena Lucena, Anabel Villalonga, Paula Diez, Sandra Jimenez-Falcao, Felix Sancenon, Alfredo Sanchez, Diana Vilela, Paloma Martinez-Ruiz, Ramon Martinez-Manez, Reynaldo Villalonga
Summary: A novel enzyme-controlled nanomachine with multiple release mechanisms was constructed using modified mesoporous silica nanoparticles and encapsulated drugs. The release of drugs was achieved through the presence of H2O2, acidic media, and enzymatic reactions, allowing for on-command delivery. The nanomachine demonstrated successful controlled release of drugs in cancer cells.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
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)
