Journal of Electroanalytical Chemistry最新文献

{"title":"Effects of overvoltage and temperature on the lithium insertion kinetics of MgMn2O4","authors":"Kingo Ariyoshi ,&nbsp;Shumpei Masuda","doi":"10.1016/j.jelechem.2023.117615","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117615","url":null,"abstract":"<div><p>The power capability of lithium-ion batteries strongly depends on the reaction kinetics of the lithium insertion material used in the electrodes. Previously, chronoamperometry revealed that the lithium insertion reaction of MgMn₂O₄ differs between static and dynamic processes and that the dynamic process consists of a nucleation–growth process followed by diffusion. Herein, we present the overvoltage and temperature dependence of the reaction rate of MgMn₂O₄ through chronoamperometry results under different applied voltages and temperatures. The rate constant of each process is determined by fitting the measured current profile to a solid-state reaction model. The rate constant of the nucleation-growth process exhibits an Arrhenius relationship with temperature and a Tafel-like relationship with overvoltage, whereas that of diffusion exhibits an Arrhenius relationship with temperature and does not depend on overvoltage. These dependencies are different because nucleation–growth is a reaction process on the particle surface, whereas diffusion is a reaction process occurring inside the particle. Accordingly, the rate-determining step of lithium insertion under various operating conditions is discussed.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117615"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2620204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CeO2 decorated bimetallic phosphide nanosheet as efficient catalyst towards water splitting reaction","authors":"Hao Sun ,&nbsp;Boxuan Jin ,&nbsp;Shuyi Cao,&nbsp;Jinghan Zhang,&nbsp;Tianhang Li,&nbsp;Xiaojing Liu,&nbsp;Guihua Liu,&nbsp;Jingde Li","doi":"10.1016/j.jelechem.2023.117591","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117591","url":null,"abstract":"<div><p>Developing low-cost and high-performance electrocatalysts for water splitting is crucial for hydrogen production. In this study, a high-performance hydrogen and oxygen evolution reaction (HER/OER) bifunctional electrocatalyst is developed by introducing oxygen-deficient CeO₂ nanoparticles on (Ni, Co)₂P nanosheets. The introduction of defective CeO₂ modulates the electronic structure of the CeO₂@(Ni, Co)₂P/NF interface, which offers a synergistic effect promoting the HER/OER reaction in the alkaline water splitting process. Specifically, the CeO₂@(Ni, Co)₂P/NF electrode exhibits an overpotential of 151 mV for HER and 257 mV for OER at current density of 100 mA·cm⁻². In the overall water electrolysis test, it exhibits excellent stability performance at a cell voltage of 1.70 V around 100 mA·cm⁻². This work shows an alternative strategy for the development of active bifunctional water splitting electrocatalysts.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117591"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1760681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combined atomic-scale/DFT-theoretical simulations and corrosion protection study of AA2024-T3 in 3.5% NaCl by phenolphthalein derivatives: Surface characterization (FT-IR, FT-RAMAN, and SEM)","authors":"Yasmine Fernine ,&nbsp;Rajesh Haldhar ,&nbsp;Nadia Arrousse ,&nbsp;M. Ebntouhami ,&nbsp;A. Taleb ,&nbsp;Seong-Cheol Kim ,&nbsp;M. Taleb","doi":"10.1016/j.jelechem.2023.117610","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117610","url":null,"abstract":"<div><p>This work investigates the effectiveness of two organic inhibitors, CH3O-φ-OCH3 (<em>P</em>3) and bzO-φ-Obz (<em>P</em>4), in preventing corrosion of aluminum alloy 2024-T3 in a 3.5% NaCl solution. The study employs a combination of experimental and theoretical research methods to gain a comprehensive understanding of the corrosion inhibition behavior. Density functional theory (DFT) studies and molecular dynamics (MD) simulations provide atomic-level insights into the resistance mechanism and the influence of the molecular structures of <em>P</em>3 and <em>P</em>4 on corrosion inhibition. The potentiodynamic polarization experiments (PDP) confirm that the studied compounds are mixed-type inhibitors. At a concentration of 10⁻⁴ M, <em>P</em>3 and <em>P</em>4 exhibit impressive inhibition efficiencies of 87.5% and 92.5%, respectively. FTIR and Raman spectroscopy were utilized to show that an adsorbent protective layer was formed on the surface of the aluminum when it was immersed in an inhibited solution. The scanning electron microscopy (SEM) morphology analysis indicates that the presence of <em>P</em>3 and <em>P</em>4 inhibitors effectively reduces corrosion on the surface of the AAl 2024 alloy. Furthermore, energy-dispersive X-ray spectroscopy (EDS) analysis confirms the formation of a chemical particle coating on the surfaces of the Al alloy. Electrochemical impedance (EIS) measurements of total resistance bias (Rp) further demonstrate the superior corrosion resistance of the inhibitors, as the resistance increases with inhibitor concentration. These findings highlight the strengths of this work in providing a comprehensive understanding of the corrosion inhibition mechanism and the excellent performance of <em>P</em>3 and <em>P</em>4 as inhibitors for aluminum alloy 2024-T3 in a NaCl environment.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117610"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3399951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of carbon nanotubes concentrations on the performance of carbon nanotubes/zinc oxide nanocomposite for photoelectrochemical water splitting","authors":"Asma M. Alenad ,&nbsp;T.A. Taha ,&nbsp;Mohamed Zayed ,&nbsp;Ahmed Gamal ,&nbsp;Mohamed Shaaban ,&nbsp;Ashour M. Ahmed ,&nbsp;Fatma Mohamed","doi":"10.1016/j.jelechem.2023.117579","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117579","url":null,"abstract":"<div><p>Under the influence of visible light, the photoelectrochemical (PEC) method of water splitting offers a green method for producing sustainable hydrogen. In this work, several volume ratios of carbon nanotubes (CNTs) were incorporated in the zinc oxide (ZnO) matrix to prepare ZnO/CNTs nanocomposites on a glass substrate as photoelectrodes for hydrogen production. These electrodes were synthesized via the spray pyrolysis technique and chemical vapor deposition. Various approaches were used to analyze the chemical composition, crystal structure, morphology, and optical properties of pure ZnO and ZnO/CNTs nanocomposites. The structural properties showed that crystallite size is decreased from 44.2 nm to 36.8 nm, and the optical shows that the energy bandgap (Eg) enhanced from 3.07 to 2.87 eV for pure ZnO and the optimum sample of ZnO/7 mL CNTs nanocomposite, respectively. The maximum photocurrent density (Jph) was found for the 7 mL CNTs among the produced ZnO/X CNTs nanostructures. The value of Jph for ZnO/7 mL CNTs (200.7 µA/cm²) is around 33 times greater compared with pure ZnO (6.96 µA/cm²). At 490 nm, the incident photon-to-current efficiency (IPCE) of ZnO/7 mL CNTs is roughly 9.85 %. The ZnO/CNTs photoelectrode showed a hydrogen evolution rate of 4.34 mmole/h.cm². The improved photoelectrode additionally exhibits strong chemical stability and a lengthy lifetime under visible light without photo-corrosion. Finally, the electrochemical impedance spectroscopy and the PEC water-splitting mechanism for ZnO/CNTs were discussed. This study presents a simple method that enables the fabrication of inexpensive and efficient ZnO/CNTs photoelectrode for renewable energy applications.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117579"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3082837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heteroatom-doped MNC catalysts for oxygen reduction reactions: Doping strategies and active site regulation","authors":"Yu Zhang ,&nbsp;Siyuan Zhu ,&nbsp;Xian Wang ,&nbsp;Zhao Jin ,&nbsp;Junjie Ge ,&nbsp;Changpeng Liu ,&nbsp;Wei Xing","doi":"10.1016/j.jelechem.2023.117506","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117506","url":null,"abstract":"<div><p>M<img>N<img>C catalyst is the most potential alternative candidate for precious metal-based catalyst and has been widely concerned by researchers in recent years. As a simple and effective means, heteroatom doping is widely used to improve catalyst performance. It has been proved that heteroatom can adjust the intrinsic activity of catalyst sites by optimizing the electronic structure of MNx active sites. This review provides a comprehensive discussion on the influence of heteroatom doping on catalytic activity and the modulation of active centers in M<img>N<img>C catalysts. The various methods of introducing heteroatoms into M<img>N<img>C catalysts are thoroughly examined, and common strategies for heteroatom doping are summarized. Additionally, this article addresses current challenges in the research of M<img>N<img>C catalysts and suggests potential future directions for their development.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117506"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1760685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conflicting roles of F doping on electrochemical performance of layered-spinel Li1.2Mn0.75Ni0.25O2-zFz as cathode materials for Li-ion batteries","authors":"Ngoc Hung Vu ,&nbsp;Hong Ha Thi Vu ,&nbsp;Ho Xuan Nang ,&nbsp;Phan Thi Dien ,&nbsp;Le Thi Hoa ,&nbsp;Won Bin Im ,&nbsp;Vu Thu Ha ,&nbsp;Luu Anh Tuyen ,&nbsp;Nguyen Quang Hung ,&nbsp;Van-Duong Dao","doi":"10.1016/j.jelechem.2023.117575","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117575","url":null,"abstract":"<div><p>Herein, the conflicting roles of F doping on the electrochemical performance of layered-spinel Li_1.2Mn_0.75Ni_0.25O_2-<em>_z</em>F<em>_z</em> (<em>z</em> = 0, 0.05, 0.1) cathode materials are studied. The compound consists of Li_1.2Mn_0.6Ni_0.2O₂ and LiMn_1.5Ni_0.5O₄ with their phase ratio depending on F doping content. When <em>z</em> = 0.05, it favors the spinel phase formation, leading to increased first Coulombic efficiency and improved cycle stability. However, it reduces the cathode capacity to 250 mAh g⁻¹ at C/10 (the capacity of the pristine is 280 mAhg⁻¹). With F doping content increasing to <em>z</em> = 0.1, the cycle stability of the cathode is the best, with 96 % capacity retention after 200 cycles at C/2. The high level of F stabilizes the structure, prevents phase transition, and retards voltage decay. The result demonstrates a promising strategy for the design of composite cathode materials by F doping.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117575"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1761701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Some approximations on the effect of the supporting electrolyte towards electrochemical advanced oxidation degradation of Reactive Orange 84 (RO84)","authors":"Martin O.A. Pacheco-Álvarez ,&nbsp;Oracio Serrano-Torres ,&nbsp;Abudukeremu Kadier ,&nbsp;Enric Brillas ,&nbsp;Juan M. Peralta-Hernández","doi":"10.1016/j.jelechem.2023.117626","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117626","url":null,"abstract":"<div><p>In this paper, some advanced oxidation electrochemical processes such as anodic oxidation (AO), electro-Fenton (EF), and photoelectro-Fenton (PEF) to carry out the degradation of the azo dye Reactive Orange 84 (RO84) are presented. For this, boron-doped diamond (BDD) electrodes were used, and different configurations were taken in a stirred tank cell, like BDD/graphite and BDD/BDD. The effect of different operating parameters on the discoloration process was evaluated, including the concentration of the supporting electrolyte, namely 50 and 75 mM of Na₂SO₄, along with 50 mM NaCl and mixtures of Na₂SO₄ + 25 mM NaCl. The effect of the applied current density at 25, 50, and 100 mA cm⁻² over the loss of color was also analyzed using initial RO84 concentrations of 100 and 200 mg/L. The production of free radicals was evaluated in the bulk solution. The decrease in chemical oxygen demand (COD) was determined and the evolution of oxalic acid, a nontoxic, short-chain carboxylic acid was quantified as a final product of all treatments by using ion-exclusion high-performance liquid chromatography.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117626"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2560427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elucidating d-π conjugated two-dimensional 2,3,6,7,10,11-hexahydroxytriphenylene based conductive metal-organic framework for hybrid supercapacitors","authors":"Muhammad Zahir Iqbal ,&nbsp;Misbah Shaheen ,&nbsp;Muhammad Waqas Khan ,&nbsp;Salma Siddique ,&nbsp;Sidra Farid ,&nbsp;Sikandar Aftab ,&nbsp;Saikh Mohammad Wabaidur","doi":"10.1016/j.jelechem.2023.117564","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117564","url":null,"abstract":"<div><p>Electrochemical energy technology demands highly proficient and stable systems which ultimately rely upon the discovery and development of promising electrode materials. Here, we report a two-dimensional conductive nickel- metal organic framework (Ni-MOF) for energy storage application. A novel Ni- based MOF was synthesized by utilizing a distinctive ligand 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP termed as Ni₃(HHTP)₂. The highly conductive, porous and stable two dimensional <span><math><mi>π</mi></math></span>-conjugated structure of HHTP makes Ni₃(HHTP)₂ an auspicious contender for energy storage applications. We characterize the Ni₃(HHTP)₂ developed through hydrothermal route for its structural properties and then explore its energy storage profile by fabricating the hybrid energy storage device. The Ni₃(HHTP)₂ based asymmetric device exhibits the capacity of 194 C/g providing the energy (E_s) and power density (P_s) of 43 Wh/kg and 2400 W/kg, respectively. We then scrutinize its capacitive and diffusive components by calculating regression parameters k₁ and k₂ using Dunn’s model to bring further insight into the electrochemical characteristics of the electrode material. Ni₃(HHTP)₂ is an appealing member of 2D conductive MOFs to utilize for energy storage applications.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117564"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3158672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of an electrochemical cyclooxygenase biosensor to evaluate target–drug viability and interactions","authors":"Raphael P. Bacil ,&nbsp;Estênio A.O. Marcondes Filho ,&nbsp;Marcelo C. Portes ,&nbsp;Victor Vendruscolo ,&nbsp;Jéssica Luíza M. Cappelletti ,&nbsp;Gabriel P. Bacil ,&nbsp;Guilherme R. Romualdo ,&nbsp;William R. de Araújo ,&nbsp;Rafael M. Buoro ,&nbsp;Ana M. da Costa Ferreira ,&nbsp;Luís F. Barbisan ,&nbsp;Silvia H.P. Serrano","doi":"10.1016/j.jelechem.2023.117618","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117618","url":null,"abstract":"<div><p>In this research, we developed a biosensor to analyze the anti-inflammatory properties of non-steroidal anti-inflammatory drugs (NSAIDs) and potential candidate molecules. The chemical interaction between commercial NSAIDs and their target, the <em>cyclooxygenase-2</em> enzyme (COX), was studied using electrochemical techniques and electronic paramagnetic resonance (EPR). The modified electrode, COX@GCE biosensor, presented two main reduction processes. We observed that the first one involves one electron and one proton related to tyrosyl radical reduction to tyrosine, and the second comprises a one-electron reduction from the Fe (IV) to Fe (III) species present in the enzyme’s active site, which in the presence of hydrogen peroxide results in a catalytical process. Based on these results, an electrochemical mechanism of the COX enzyme is proposed. Additionally, the quantitative inhibitory interaction mechanisms of six commercial NSAIDs were studied using this biosensor. The NSAIDs acetylsalicylic acid, dipyrone, and ibuprofen presented the higher COX inhibitory percentual, being, therefore, the most effective NSAIDs among the studied group. Salicylic acid also presented a significant inhibition capability in both electrochemical and EPR studies. The effect of some NSAIDs, e.g., dipyrone and acetaminophen, can be explained by the redox inhibition hypothesis and can be related to the direct interaction and inactivation of the iron present in the enzyme’s active site. Ibuprofen and naproxen presented irreversible COX inhibition. Despite that, the EPR shows that these drugs have relatively weak interactions with the COX active site, suggesting they should interact with the external structures resulting in the inhibition of its activity. Finally, the developed enzymatic sensor presented a high potential to study the anti-inflammatory properties of well-known drugs and can be a useful tool in the development of new NSAIDs, in a more efficient way, therefore presenting high applicability in drug development, pharmaceutical, and biomedical applications in both academia and industry.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117618"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3158674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Redox properties of N-hydroxyimides in sulfuric acid-acetonitrile mixed solution as a HAT mediator for alcohol oxidation","authors":"Shinya Kishioka","doi":"10.1016/j.jelechem.2023.117598","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117598","url":null,"abstract":"<div><p>Two hydroxyimides, <em>N</em>-hydroxysuccinimide and <em>N</em>-hydroxy-1,8-naphthalimide, showed chemically reversible redox responses in a sulfuric acid-acetonitrile mixture. In the mixed solution containing benzyl alcohol, catalytic oxidation of alcohol using <em>N</em>-oxyl radicals generated by the oxidation of hydroxyimide as a mediator was observed. The reaction between the mediator and alcohol was quantitatively evaluated from measurements by rotating disk electrode voltammetry.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117598"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2560429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}