Electrochemistry Communications最新文献

{"title":"Application of PAMAM-functionalized NH2-MCM-41 modified glassy carbon electrode for quantitative determination of Cu (II) in water samples by using stripping voltammetry","authors":"Fariba Garkani Nejad ,&nbsp;Hadi Beitollahi ,&nbsp;Iran Sheikhshoaie","doi":"10.1016/j.elecom.2025.108047","DOIUrl":"10.1016/j.elecom.2025.108047","url":null,"abstract":"<div><div>Copper ions act as essential metal ions in various physiological processes, but their excessive accumulation can cause toxicity and severe risks to human health and the environment. Hence, the sensitive and accurate determination of copper levels in water samples is of great significance for public health protection and environmental monitoring. In this study, a new strategy was proposed for the determination of Cu (II) ions in the water samples based on polyamidoamine dendrimer-functionalized NH₂-mesoporous silica (PAMAM-functionalized NH₂-MCM-41) as a sensing platform. The PAMAM-functionalized NH₂-MCM-41 was prepared by using a post-grafting method. The structure/morphology of the prepared PAMAM-functionalized MCM-41 was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy-dispersive X-ray (EDS) spectroscopy techniques. Then, the PAMAM-functionalized NH₂-MCM-41 modified glassy carbon electrode (GCE) was used for differential pulse anodic stripping voltammetric (DPASV) determination of Cu (II). Due to the combination of the high chelating ability of terminal amino groups of PAMAM dendrimer to metal ion (Cu (II)) with the large surface area of MCM-41, the PAMAM/NH₂-MCM-41/GCE showed an excellent sensitive effect for Cu (II) determination. The different parameters and conditions affecting the stripping current response of Cu (II), including accumulation time, accumulation potential, and pH value were investigated and optimized. Under the optimum conditions, the stripping peak current of Cu (II) linearly increased with its concentration between the 0.002 μM–8.0 μM. The limit of detection (LOD) is calculated to be 6.1 × 10⁻¹⁰ M for Cu (II) (S/N = 3). Finally, the PAMAM/NH₂-MCM-41/GCE sensor was successfully used for the Cu (II) determination in water samples, with acceptable recoveries of 97.1 %–103.3 %. The obtained results showed that PAMAM-Functionalized MCM-41 as a promising modifying material can be potentially used in the design and fabrication of electrochemical sensors for heavy metal ions determination.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"180 ","pages":"Article 108047"},"PeriodicalIF":4.2,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanically reinforced solid-state polymer electrolyte using illite filler for flexible all-solid-state Li-metal batteries","authors":"Jaesub Lee ,&nbsp;Jeong-Jin Yang ,&nbsp;Beomgi Kim ,&nbsp;Sunkyung You ,&nbsp;Jae-Kwang Kim ,&nbsp;Young-Ran Lee ,&nbsp;Seongki Ahn ,&nbsp;Jeha Kim ,&nbsp;Hong-Il Kim","doi":"10.1016/j.elecom.2025.108046","DOIUrl":"10.1016/j.elecom.2025.108046","url":null,"abstract":"<div><div>Solid-state electrolytes have attracted significant attention due to their high safety, mechanical stability, and compatibility with lithium metal anodes, making them a critical component in the development of next-generation all-solid-state batteries. Polymer-based solid electrolytes (PSEs) offer advantages such as flexibility, processability, and good interfacial contact with electrodes but suffer from low structural stability. In this study, PSEs were fabricated by photopolymerization from ethoxylated trimethylolpropane triacrylate and expanded illite (EI) functional filler. The PSEs synthesized with 4 wt% EI show a favorable ionic conductivity of 2.31 × 10⁻⁴ S cm⁻¹ at 25 °C and an all-solid-state Li/NCM622 coin cell using the PSE as the electrolyte delivered a discharge capacity of 129.5 mAh g^{<strong>−</strong>1} at 0.1C with 98 % Coulombic efficiency. In addition, the EI-containing PSE exhibited improved mechanical strength, enabling the fabrication of a flexible all-solid-state Li-metal battery pouch cell. This study offers valuable insight into the design of PSEs using clay-based fillers.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"180 ","pages":"Article 108046"},"PeriodicalIF":4.2,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Activation-enhanced four-state electrochromic mirrors with enhanced optical performance","authors":"Sang Bum Lee ,&nbsp;Kwang-Mo Kang ,&nbsp;Ji-Hyeong Lee ,&nbsp;Yoon-Chae Nah","doi":"10.1016/j.elecom.2025.108039","DOIUrl":"10.1016/j.elecom.2025.108039","url":null,"abstract":"<div><div>This study demonstrates a significant enhancement in reversible metal electrodeposition devices (RMEDs) through a systematic activation process using a silver‑copper electrolyte system. An electrode conditioning protocol employing a wider voltage range cyclic voltammetry (−3.5 V to 1.3 V) was developed to enable robust four-state optical switching beyond traditional transparent-mirror operation. The activation process resulted in a 63.6% increase in electrochemical activity and improved coloration efficiency, increasing from 43.2 to 54.7 cm²/C. Using an optimized step-voltage method, vivid red and blue color states were achieved, with transmittance modulation increasing from 26.2% to 58.9% for red color and from 56.9% to 63.0% for blue color after activation. The four-state device demonstrated excellent long-term stability, maintaining consistent optical performance over 6000 s of continuous cycling without degradation. This work establishes electrode activation as a key advancement for practical smart window applications, offering both aesthetic versatility through multicolor options and operational reliability for commercial use.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"180 ","pages":"Article 108039"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photo-electro-chemical properties of hydrogenated Au/TiO2 nanowires grown by seed-assisted thermal oxidation","authors":"Massimo Zimbone ,&nbsp;Lucia Calcagno ,&nbsp;Giuliana Impellizzeri","doi":"10.1016/j.elecom.2025.108021","DOIUrl":"10.1016/j.elecom.2025.108021","url":null,"abstract":"<div><div>In this paper, we study the electrochemical properties of hydrogenated Au/TiO₂ nanowires (NWs) synthesised by seed-assisted oxidation. Hydrogenation was performed electrochemically or by annealing in forming gas. The reduction process leads to a 20× improvement in photocurrent and introduces defects at the nanowires/water interface. At high frequencies, the usual Randles circuit is used. The depletion layer defect density is estimated to be 10¹⁶, 10¹⁸ and 10²⁰ cm⁻³ for “as-grown”, “Forming gas” and “electrochemically reduced” samples, respectively. At frequencies lower than the relaxation frequency, defects localised at the nanowire/water interface cause an enhancement in capacitance. Under UV irradiation, a density of 10¹² cm⁻² can be estimated for these defects at about 0 V_Ag/AgCl.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"180 ","pages":"Article 108021"},"PeriodicalIF":4.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research Progress of isoniazid electrochemical sensors","authors":"Huanyu Che ,&nbsp;Gaihua He ,&nbsp;Xuekun Liu ,&nbsp;Xin Guo ,&nbsp;Chang Lei ,&nbsp;Ye Liao","doi":"10.1016/j.elecom.2025.108038","DOIUrl":"10.1016/j.elecom.2025.108038","url":null,"abstract":"<div><div>This paper reviews the research progress of isoniazid electrochemical sensors in recent years. As an important anti-tuberculosis drug, the rapid and sensitive detection of isoniazid is of great significance for clinical treatment and drug quality control. This paper first introduces the basic properties and detection requirements of isoniazid, then elaborates on the working principle of electrochemical sensors and their application in isoniazid detection, with a focus on discussing isoniazid electrochemical sensors with different modified materials. Finally, the future development direction of isoniazid sensors is prospected, providing valuable insights for future research.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"180 ","pages":"Article 108038"},"PeriodicalIF":4.2,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct electron transfer-type bioelectrocatalytic dioxygen reduction with copper efflux oxidase lacking type I copper","authors":"Taiki Adachi ,&nbsp;Toshitada Takei ,&nbsp;Kenji Kano ,&nbsp;Satoshi Yamashita ,&nbsp;Kunishige Kataoka ,&nbsp;Keisei Sowa","doi":"10.1016/j.elecom.2025.108036","DOIUrl":"10.1016/j.elecom.2025.108036","url":null,"abstract":"<div><div>Copper efflux oxidase (CueO) is a direct electron transfer (DET)-type bioelectrocatalyst used for dioxygen (O₂) reduction. Type I copper (T1Cu) has been suggested to be essential for donating electrons to trinuclear copper center (TNC) during the catalytic cycle of CueO. However, T1Cu-deleted (T1D) variants have not yet been characterized in DET-type reactions. This study investigated the bioelectrochemical properties of the T1D CueO variants, C500S and C500S/E506Q. Both variants showed a significant catalytic current representing DET via TNC at the Ketjen black-modified electrode, whereas T1Cu appeared to accelerate the catalytic cycle of CueO. Additionally, C500S/E506Q showed a 10-fold higher activity than C500S. Through kinetic analysis of the voltammograms, the reorganization energy of TNC was estimated to be lowered owing to the E506Q mutation, resulting in fast DET of C500S/E506Q. These findings can help improve the DET-type reactions involving multicopper oxidases.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108036"},"PeriodicalIF":4.2,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A ternary SnSb/P/EG composite anode enables high-rate capability and stable low-temperature cycling for Lithium storage","authors":"Guozheng Ma ,&nbsp;Kaiqiang Song ,&nbsp;Xingyu Xiong ,&nbsp;Lingshu Dong ,&nbsp;Yuchong Ge ,&nbsp;Zhongchen Lu ,&nbsp;Xiaoyun Gao ,&nbsp;Renzong Hu","doi":"10.1016/j.elecom.2025.108037","DOIUrl":"10.1016/j.elecom.2025.108037","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) face challenges in low-temperature environments, including hindered lithium-ion transport, poor capacity retention and inadequate charging capability. The limited capacity (372 mAh g⁻¹) and suboptimal low-temperature performance of graphite anode restricts the broader application of LIBs across various fields. Herein, a SnSb/P/EG composite anode material was prepared via a simple ball-milling method. The SnSb/P/EG composite anode delivers a high specific capacity of 815 mAh g⁻¹ at 0.2 A g⁻¹and 544 mAh g⁻¹ at 10 A g⁻¹ under 30 °C. Notably, under −30 °C, it delivers a high reversible capacity of 643 mAh g⁻¹ with a high retention of 91.5 % after 100 cycles. Its exceptional low-temperature performance is attributed to enhanced pseudocapacitive characteristics and the enhanced reaction kinetics in the amorphous Li-alloys in the ternary composite, offering novel insights for the design of LIBs anode materials for low-temperature applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108037"},"PeriodicalIF":4.2,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly hydrothermal synthesis of Co3O4-based NiO–Fe2O3 binary and ternary nanocomposites for electrochemical energy storage applications","authors":"Khalid Saifullah ,&nbsp;Kamran Ullah ,&nbsp;Najmul Hassan ,&nbsp;Tayyaba Shireen ,&nbsp;Salah Knani ,&nbsp;Vineet Tirth ,&nbsp;Ali Algahtani ,&nbsp;Abid Zaman","doi":"10.1016/j.elecom.2025.108035","DOIUrl":"10.1016/j.elecom.2025.108035","url":null,"abstract":"<div><div>The increasing global demand for advanced energy storage technologies necessitates the development of high-performance materials. In this study, Co₃O₄-based NiO-Fe₂O₃ binary and ternary nanocomposites were synthesized via a green hydrothermal method using banana peel extract as a sustainable reducing agent. The Phase analysis, microstructural, elemental composition, electrochemical, and magnetic properties of synthesized materials were analyzed using X-ray diffractions (XRD), scanning electron microscope (SEM), energy dispersive x-rays (EDX), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), and vibrating sample magnetometry (VSM) technique. XRD analysis confirmed the coexistence of binary (NiO-Co₃O₄) and ternary Fe₂O₃-NiO-Co₃O₄ phases in the nanocomposite. The surface morphology analysis showed the presence of spherical and round-like shape. Electrochemical analysis revealed a high specific capacity of 2692 mAh g⁻¹ for the Fe₂O₃-NiO-Co₃O₄ nanocomposite, significantly surpassing the binary compound. The corresponding energy densities were 391.2, 363.2, 328.2 J/mA.cm⁻², with Tafel slopes of 112, 129, and 118 mV/dec, respectively. The VSM results indicated retentivity values of 1.49, 2.53, and 1.03 emu/g for NiO/Co₃O₄, Fe₂O₃/Co₃O₄, and Fe₂O₃/NiO/Co₃O₄ nanocomposite. The energy dispersive x-rays (EDX) spectroscopy confirmed the presence of Co, O, Fe, and Ni elements. These findings highlight the potential of Co₃O₄-based NiO/Fe₂O₃ nanocomposites as promising candidates for high performance energy and data storage applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108035"},"PeriodicalIF":4.2,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seven-parameter PEMFC model optimization using an battlefield optimization algorithm","authors":"Manish Kumar Singla ,&nbsp;S.A. Muhammed Ali ,&nbsp;Jyoti Gupta ,&nbsp;Pradeep Jangir ,&nbsp;Arpita ,&nbsp;Ramesh Kumar ,&nbsp;Reena Jangid ,&nbsp;Mohammad Khishe","doi":"10.1016/j.elecom.2025.108033","DOIUrl":"10.1016/j.elecom.2025.108033","url":null,"abstract":"<div><div>Precise modeling of Proton Exchange Membrane Fuel Cells (PEMFCs) requires accurate identification of key parameters, which are often unavailable from manufacturers but crucial for predicting fuel cell performance. The system relies on seven key parameters to determine activation and ohmic and concentration overpotential values through ξ1, ξ2, ξ3, ξ4, λ, Rc, and β. The Battlefield Optimization Algorithm (BfOA) represents a new optimization method that finds these seven essential PEMFC parameters effectively. Using Sum Squared Error (SSE) to minimize the difference between estimated and actual cell voltages, BfOA outperformed other optimization algorithms in determining parameters for six PEMFC models under varying operating conditions. The optimized parameters enabled accurate prediction of I-V and P<img>V curves, closely matching experimental data. BfOA's efficiency and robustness make it well-.</div><div>suited for real-time fuel cell modeling. Its effectiveness as a method for precise PEMFC device analysis within electronic component simulators is demonstrated. Future development will explore BfOA's compatibility with other fuel cell technologies, incorporate real-time data capabilities, and implement the algorithm in embedded systems for real-time PEMFC monitoring and control.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108033"},"PeriodicalIF":4.2,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Activity and stability proxies for automated evaluation of IrOx electrocatalysts under variable operating conditions","authors":"Guanqi Huang ,&nbsp;Carlota Bozal-Ginesta ,&nbsp;Alán Aspuru-Guzik","doi":"10.1016/j.elecom.2025.108034","DOIUrl":"10.1016/j.elecom.2025.108034","url":null,"abstract":"<div><div>To accelerate the screening of electrocatalyst materials, it is necessary to enhance the efficiency of their performance evaluation and optimization under dynamic conditions. The activity and stability of electrocatalyst materials are two crucial metrics that are typically correlated, and thus need to be evaluated in parallel. However. assessing both activity and stability in a time-efficient, reliable and comparable manner remains a challenge. Given the rising interest in evaluating electrocatalysts under realistic fluctuating conditions, we propose an electrochemical approach that uses random sampling and Bayesian optimization to explore pulsed amperometry conditions in hydrous iridium oxides for the oxygen evolution reaction. This method provides activity and stability proxies independent of sample loading which are validated against literature data.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108034"},"PeriodicalIF":4.2,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}