Electrochimica Acta最新文献

{"title":"Electrochemical nanosensors in therapeutic pharmaceutical monitoring: from drug following to clinical protocols","authors":"Maritza Fernández ,&nbsp;Jahir Orozco","doi":"10.1016/j.electacta.2025.146550","DOIUrl":"10.1016/j.electacta.2025.146550","url":null,"abstract":"<div><div>Therapeutic monitoring (TDM) combines the quantification of drug concentrations in the blood, pharmacological interpretation, and treatment guidance, introducing a valuable tool in precision medicine. However, quantifying drug concentrations requires expensive techniques, specialized laboratories, and trained personnel. A plausible alternative to solve this limitation is quantifying pharmaceutical compounds using nanosensors. This review starts by describing the standard methodology used in TDM to emphasize further how to explore electrochemical nanosensors for this purpose. It points out the advantages of electrochemical nanosensors compared to conventional methodologies based on their analytical features, potential for point-of-care applications, fast response, miniaturization, convenient operation, and portability. The review concludes by summarizing the patented work and discussing important points to consider in developing electrochemical nanosensors in clinical settings, as well as challenges and gaps that must be filled to introduce such new technological innovations in TDM and personalized therapy.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"533 ","pages":"Article 146550"},"PeriodicalIF":5.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CO2 / H2O co-electrolysis using Single and Stack Solid Oxide Electrolysis Cell (SOEC)","authors":"Riko Inuzuka, Norikazu Osada, Naomi Tsuchiya, Hiroaki Kawamori, Nagayoshi Ichikawa, Tatsumi Ishihara","doi":"10.1016/j.electacta.2025.146535","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146535","url":null,"abstract":"The production of syngas by co-electrolysis using solid oxide electrolysis cells (SOECs) has been attracting attention as a highly efficient technology for converting CO₂ into useful compounds. However, co-electrolysis is complicated because the main electrolysis reactions and side reactions occur simultaneously. In this study, co-electrolysis of CO₂ and H₂O were conducted using a large size single cell with cell holder used for stack applications and also 3 cells stack. It was found that I-V curves was hardly dependent on the CO₂ and H₂O ratio in feed gas and thermal neutral voltage is also hardly changed, suggesting that the reverse water-gas shift (RWGS) reaction is the primary CO-producing reaction even in the larger size cells. So, the main electrolysis reaction was steam electrolysis occurred at three phase boundary and RWGS mainly occurred in gas phase with unconverted CO₂. Similar dependency was observed on the 3 cells stack indicating that the outlet gas composition and electrochemical properties exhibited similar dependency on CO₂ and H₂O ratio of the large single cell. This finding suggests that stacking multiple cells has minimal impact on the reaction mechanism or outlet gas composition, and that CO production occurred by RWGS reaction similar with the large single cell.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"12 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring Polymorphic CoSe2 via Interstitial Doping of Sb for Advanced Counter Electrodes in DSSC applications","authors":"Sruthi Sureshkumar, George Jacob","doi":"10.1016/j.electacta.2025.146558","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146558","url":null,"abstract":"The counter electrode (CE) layer in dye-sensitized solar cells (DSSCs) acts as a cornerstone in the catalytic reduction of the redox electrolyte, typically the iodide/triiodide (I⁻/I₃⁻) redox electrolyte couple, and facilitates the replenishment of the oxidized dye molecules. The substantial cost, sparse availability, and proneness to corrosion of conventionally used Platinum (Pt) CE with the I⁻/I₃⁻ electrolyte, have spurred extensive research into alternative CE materials. Transition metal dichalcogenides (TMDs), especially cobalt diselenide (CoSe₂), have emerged as potential substitutes for CE material in DSSC due to their good electrochemical properties and high conductivity. This study focuses on the potential of antimony (Sb)-doped CoSe₂ as a novel material for CE application in DSSC, aiming to improve the stability, electrocatalytic activity, and overall device performance. We prepared Sb-doped CoSe₂ with various doping concentrations using a simple hydrothermal technique and analysed the compositional, morphological and structural properties of the prepared materials. The CoSe₂ doped with 4 wt% Sb (4Sb-CoSe₂) exhibited enhanced charge transfer kinetics, low charge transfer resistance, and superior catalytic activity compared to other concentrations, making it comparable to standard Pt CE in electrochemical analysis. DSSC fabricated with 4Sb-CoSe₂ CE achieved a photovoltaic (PV) efficiency of 6.99% under AM 1.5G, which is attributed to the interstitial doping of Sb³⁺ ions, that increases the active sites for redox processes, conductivity and charge transport kinetics of CE. The 16-day stability assessment reveals that the 4Sb-CoSe₂-based DSSC retains stable PV performance with only minor efficiency loss, indicating strong durability against the iodide/triiodide redox electrolyte. Therefore, Sb-doped CoSe₂ can be a viable substitute for Pt CE in DSSC and can be utilised for their large-scale production.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"24 1","pages":"146558"},"PeriodicalIF":6.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Symmetrical-Branched Pyrrolidinium Ionic Plastic Crystal Electrolytes: Synthesis and Sodium-Ion Battery Potential","authors":"Fatihah Najirah Jumaah, Yoshifumi Hirotsu, Morgan L. Thomas, Masahiro Yoshizawa-Fujita","doi":"10.1016/j.electacta.2025.146549","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146549","url":null,"abstract":"Ionic plastic crystals (IPCs), akin to ionic liquids (ILs) but possessing unique properties, are of interest to remarkably enhance battery safety. However, most IPCs or ILs are commonly synthesized via a conventional method – a substitution reaction with an <em>N</em>-alkyl pyrrolidone and alkyl halide which commonly requires a long reaction time and large volume of organic solvents. In this study, we attempted a greener and facile method to synthesize the symmetrical cation - <em>N,N</em>- diisopropylpyrrolidinium bromide ([C_i3i3pyr][Br]) via a microwave-assisted synthesis procedure followed by a metathesis reaction to obtain [C_i3i3pyr][FSA]. The microwave method provides a viable alternative with potential benefits in reaction speed and environmental impact compared to conventional techniques. Among the three salts tested for anion exchange, KFSA emerged as the most effective in the conversion from Br⁻ to FSA⁻. Comprehensive spectroscopic and thermal analyses were conducted to validate the physicochemical and electrochemical properties of [C_i3i3pyr][FSA]. The material displayed three solid-solid transitions (<em>T</em>_s-s) at −27, 13, and 68°C. The ionic conductivity of [C_i3i3pyr][FSA] at ambient temperature is approximately 10⁻⁷ S cm⁻¹. Investigation into the temperature dependence of ionic conductivity revealed a significant increase from ∼10⁻¹⁰ to ∼10⁻⁸ S cm⁻¹ over the temperature range of −30 to 10°C, followed by a notable jump in conductivity from 60 to 70°C, corresponding to the <em>T</em>_s-s observed at 13 and 68°C. Additionally, the potential for the performance of this material in sodium-ion batteries was evaluated by evaluating electrochemical properties with varying sodium salt concentrations, demonstrating significant improvement in conductivity and redox behavior. These findings highlight the potential of [C_i3i3pyr][FSA] as a promising electrolyte for safer, more efficient sodium-ion batteries, particularly due to its facile and eco-friendly microwave synthesis method.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"47 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-Loaded Catalyst Layers For Proton Exchange Membrane Fuel Cell Dynamic Operation Part 2: Modeling Study","authors":"Florent Vandenberghe, Fabrice Micoud, Pascal Schott, Marian Chatenet","doi":"10.1016/j.electacta.2025.146542","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146542","url":null,"abstract":"Numerous models have been developed to simulate the performance and degradation mechanisms of proton exchange membrane fuel cell (PEMFC) components. The Nernst and Butler-Volmer approaches, in a single-step reaction, often describe the hydrogen oxidation reaction (HOR) and the oxygen reduction reaction (ORR), the latter being of higher complexity as it involves numerous intermediate species. The experimental work and dataset from the first part of this study [<span><span>1</span></span>], obtained in differential single-cell (DC) on low-loaded cathode catalyst layers (20 and 100 µg_Pt cm_geo⁻²), have been used to further study the behavior of the cathode Pt/C electrocatalyst. The objective is to introduce a detailed electrocatalytic description in one-dimensional through-thickness models, particularly the Pt surface oxide formation/reduction: the reaction is decomposed into several elementary steps associated with the surface state of Pt, as well as the formation of ‘bulk’ Pt-oxides, formed via the chemical place-exchange reaction under nitrogen (H₂/N₂) and oxygen (H₂/O₂) atmospheres. This electrochemical path was successfully implemented into a complete ORR performance model at the cathode; it provides a more comprehensive description of the physical and electrochemical phenomena involved in low-loaded cathode catalyst layers during non-stationary PEMFC operation, which helps to capture the hysteresis phenomena observed experimentally during polarization curve measurements.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"15 1","pages":"146542"},"PeriodicalIF":6.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Yolk-shell-structured (CrMnFeCoNi)3O4 high-entropy oxide anode for high-performance lithium-ion batteries","authors":"Jagabandhu Patra ,&nbsp;Thi Xuyen Nguyen ,&nbsp;Ananya Panda ,&nbsp;Chien-Te Hsieh ,&nbsp;Fu-Ming Wang ,&nbsp;Tzi-Yi Wu ,&nbsp;Chun-Chen Yang ,&nbsp;Dominic Bresser ,&nbsp;Jyh-Ming Ting ,&nbsp;Jeng-Kuei Chang","doi":"10.1016/j.electacta.2025.146545","DOIUrl":"10.1016/j.electacta.2025.146545","url":null,"abstract":"<div><div>High-entropy oxides (HEOs), composed of multiple cations, have emerged as potential anode materials for lithium-ion batteries (LIBs) owing to their excellent capacity, outstanding cycling stability, and tunable charge-discharge properties. This study systematically investigates the effects of morphology on the electrochemical performance of HEO anodes. Combining the high-entropy strategy with morphological tuning can effectively improve the electrochemical performance. Herein, (CrFeMnNiCo)₃O₄ HEOs with well-defined nanoparticle (HEO-NP) and yolk-shell (HEO-YS) structures are successfully synthesized. The influence of morphology on the electrochemical performance of HEO-NP and HEO-YS electrodes are systematically examined. HEO-YS with a yolk-shell morphology outperforms HEO-NP, delivering superior capacities of 954 and 650 mAh g^–1 at lithiation-delithiation rates of 50 and 2000 mA g^–1, respectively, along with an impressive capacity retention of 94 % after 250 cycles. The superior rate capability and cycling stability of HEO-YS can be ascribed to its unique yolk-shell structure, which accommodates volume change, mitigates structural strain, and enhances lithium-ion diffusion. These findings provide valuable insights into morphology engineering as a strategy for optimizing the electrochemical performance of HEO anodes for next-generation LIBs.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"533 ","pages":"Article 146545"},"PeriodicalIF":5.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser-beam powder bed fusion of Si-doped Fe-Mn alloys: manufacturing quality, phase transformation and biodegradation performance","authors":"Xiong Yao ,&nbsp;Shuaishuai Zhu ,&nbsp;Cijun Shuai ,&nbsp;Chengde Gao","doi":"10.1016/j.electacta.2025.146519","DOIUrl":"10.1016/j.electacta.2025.146519","url":null,"abstract":"<div><div>Fe-Mn alloys have emerged as promising candidates for biodegradable implants due to their excellent mechanical properties and good biocompatibility. Unfortunately, Fe-Mn alloys still suffer from slow degradation. In this study, laser-beam powder bed fusion (LPBF) process combined with Si doping was proposed to fabricate Fe-Mn alloys with accelerated degradation. Firstly, an optimal process parameter (laser power of 150 W, scanning speed of 60 mm s^-1, and hatch distance of 0.08 mm) was identified based on the lowest surface roughness (2.61 μm) and the highest relative density (99.1 %). On this basis, the effects of varying Si contents (<em>x</em> <em>=</em> 0, 3, 6, and 9 wt %) on the phase composition and thereby the degradation behavior of LPBF-fabricated (LPBFed) Fe-25Mn-<em>x</em>Si alloys were systematically examined. Specifically, the extremely rapid cooling inherent to LPBF and the resulting expansion of Si solid solubility facilitated the phase transformation from γ-austenite to ε-martensite with increasing Si content, accompanied by a decrease of α-ferrite phase content. As a result, an accelerated corrosion rate (0.26±0.02 mm y^-1) was obtained for the LPBFed Fe-25Mn-6Si alloy, which was mainly attributed to the galvanic coupling corrosion occurring among the multiple phases, as well as to phase content variations induced by phase transformation. In summary, this study could offer a potential pathway for the development of biodegradable metals for implant applications.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"533 ","pages":"Article 146519"},"PeriodicalIF":5.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New insights on efficient electrochemical production of hydrogen peroxide","authors":"Robson S. Rocha ,&nbsp;Beatriz Nogueira ,&nbsp;Robson S. Souto ,&nbsp;Marcos R.V. Lanza ,&nbsp;Manuel A. Rodrigo","doi":"10.1016/j.electacta.2025.146546","DOIUrl":"10.1016/j.electacta.2025.146546","url":null,"abstract":"<div><div>Hydrogen peroxide production was investigated using a highly efficient 3D-printed electrochemical reactor (4 cm in height and width) equipped with a gas diffusion electrode. The system was evaluated across a broad range of current densities, approaching those required for industrial-scale production. Remarkably high efficiencies were achieved, which were found to be strongly influenced by the electrolyte composition but largely independent of current density. A maximum efficiency of 100 % was observed when sodium sulfate was used as the supporting electrolyte. Contrary to expectations, the use of perchlorate and nitrate instead of sulfate led to a significant decrease in efficiency, suggesting the presence of catalytic effects linked to mediated oxidation mechanisms. These findings highlight the critical role of the anodic process in the cathodic generation of hydrogen peroxide. Based on this evidence, a simple phenomenological model was developed to elucidate the primary mechanisms governing efficient hydrogen peroxide production. The model also provides practical recommendations for enhancing process efficiency, positioning this compact technology as a promising alternative to conventional electrochemical systems and a viable competitor to the industrial anthraquinone process.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"533 ","pages":"Article 146546"},"PeriodicalIF":5.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrosion prevention in electrochemical capacitors","authors":"Jarosław Wojciechowski ,&nbsp;Szymon Jasiński ,&nbsp;Grzegorz Lota","doi":"10.1016/j.electacta.2025.146547","DOIUrl":"10.1016/j.electacta.2025.146547","url":null,"abstract":"<div><div>The shrinking resources and the aggressive exploitation of fossil fuels have led to a far–reaching environmental degradation. Therefore, in recent years, work on chemical power sources and energy storage devices has been intensified. The mentioned chemical power sources and energy storage devices are not only batteries (rechargeable cells) and primary cells but also electrochemical capacitors (ECs), which have been gaining more interest in recent years. These devices, unlike typical batteries and cells, store electrical energy by accumulating a charge in an electrical double layer at the electrode/electrolyte interface. Nevertheless, regardless of the choice of the method of energy storage, every device described above has a certain lifetime, which depends on many factors, including the corrosion of metal and/or steel current collectors. Therefore, the aim of this study is to examine the impact of positive current collector anti-corrosive surface modification on the effect of the lifetime of an EC device. In this case, a double-layer oxide/siloxane coating was applied to the surface of the stainless steel collector. The research results proved that the inhibition of its corrosion by the implementation of the mentioned coating has a positive effect on the extension of the lifetime of the electrochemical capacitor.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"533 ","pages":"Article 146547"},"PeriodicalIF":5.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of tilted wall in through glass via on the electrochemical deposition process","authors":"Ziniu Yu,&nbsp;Yuhan Gao,&nbsp;Xin Lei,&nbsp;Yuxin Chen,&nbsp;Kezhong Xu,&nbsp;Yuqi Zhou,&nbsp;Fulong Zhu","doi":"10.1016/j.electacta.2025.146556","DOIUrl":"10.1016/j.electacta.2025.146556","url":null,"abstract":"<div><div>Glass substrates are advancing as key materials for high-density chip packaging due to their superior thermal and electrical properties. A critical challenge in through glass via (TGV) is achieving reliable copper electrodeposition via featuring tilted sidewalls. This study numerically investigates the via tilt angles and inhibitor concentrations in the electroplating process to optimize defect-free copper filling. Through finite element simulation, tilt angles ranging from 0° to 10° and varied inhibitor concentrations are investigated to identify conditions that promote butterfly-shaped copper deposition. Additionally, machine learning techniques are employed to predict the occurrence of void defects, enhancing the efficiency of the optimization process. The simulation results show that the appropriate inhibitor concentration is beneficial in balancing the deposition rate and reducing the formation of voids. Excessive tilt angle and inhibitor concentration lead to over-passivation, hindering deposition efficiency and compromising filling quality. This work provides insights into the electroplating of TGV and demonstrates the potential of machine learning to improve electroplating processes.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"533 ","pages":"Article 146556"},"PeriodicalIF":5.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}