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 VAg/AgCl.
{"title":"Photo-electro-chemical properties of hydrogenated Au/TiO2 nanowires grown by seed-assisted thermal oxidation","authors":"Massimo Zimbone , Lucia Calcagno , 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/TiO<sub>2</sub> 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 10<sup>16</sup>, 10<sup>18</sup> and 10<sup>20</sup> cm<sup>−3</sup> 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 10<sup>12</sup> cm<sup>−2</sup> can be estimated for these defects at about 0 V<sub>Ag/AgCl</sub>.</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}
Pub Date : 2025-08-28DOI: 10.1016/j.elecom.2025.108038
Huanyu Che , Gaihua He , Xuekun Liu , Xin Guo , Chang Lei , Ye Liao
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.
{"title":"Research Progress of isoniazid electrochemical sensors","authors":"Huanyu Che , Gaihua He , Xuekun Liu , Xin Guo , Chang Lei , 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}
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.
{"title":"Direct electron transfer-type bioelectrocatalytic dioxygen reduction with copper efflux oxidase lacking type I copper","authors":"Taiki Adachi , Toshitada Takei , Kenji Kano , Satoshi Yamashita , Kunishige Kataoka , 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 (O<sub>2</sub>) 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}
Pub Date : 2025-08-23DOI: 10.1016/j.elecom.2025.108037
Guozheng Ma , Kaiqiang Song , Xingyu Xiong , Lingshu Dong , Yuchong Ge , Zhongchen Lu , Xiaoyun Gao , Renzong Hu
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.
锂离子电池（LIBs）在低温环境下面临着锂离子传输受阻、容量保持能力差和充电能力不足等挑战。石墨阳极的容量有限（372 mAh g−1）和低温性能欠佳，限制了锂离子电池在各个领域的广泛应用。采用简单的球磨法制备了SnSb/P/EG复合负极材料。SnSb/P/EG复合阳极在0.2 a g - 1和10 a g - 1条件下具有815 mAh g - 1和544 mAh g - 1的高比容量。值得注意的是，在- 30°C下，它提供了643 mAh g - 1的高可逆容量，在100次循环后保持率高达91.5%。其优异的低温性能归功于三元复合材料中非晶锂合金的赝电容特性和反应动力学的增强，为低温应用的锂离子电池阳极材料的设计提供了新的见解。
{"title":"A ternary SnSb/P/EG composite anode enables high-rate capability and stable low-temperature cycling for Lithium storage","authors":"Guozheng Ma , Kaiqiang Song , Xingyu Xiong , Lingshu Dong , Yuchong Ge , Zhongchen Lu , Xiaoyun Gao , 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<sup>−1</sup>) 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<sup>−1</sup> at 0.2 A g<sup>−1</sup>and 544 mAh g<sup>−1</sup> at 10 A g<sup>−1</sup> under 30 °C. Notably, under −30 °C, it delivers a high reversible capacity of 643 mAh g<sup>−1</sup> 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}
Pub Date : 2025-08-19DOI: 10.1016/j.elecom.2025.108035
Khalid Saifullah , Kamran Ullah , Najmul Hassan , Tayyaba Shireen , Salah Knani , Vineet Tirth , Ali Algahtani , Abid Zaman
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.
全球对先进储能技术日益增长的需求要求高性能材料的发展。本研究以香蕉皮提取物为可持续还原剂，采用绿色水热法制备了co3o4基NiO-Fe2O3二、三元纳米复合材料。采用x射线衍射（XRD）、扫描电镜（SEM）、能量色散x射线（EDX）、循环伏安法（CV）、电化学阻抗谱（EIS）、线性扫描伏安法（LSV）和振动样品磁强计（VSM）技术对合成材料的物相分析、微观结构、元素组成、电化学和磁性能进行了分析。XRD分析证实了复合材料中存在二元（NiO-Co3O4）相和三元Fe2O3-NiO-Co3O4相。表面形貌分析显示为球形和圆形。电化学分析表明，Fe2O3-NiO-Co3O4纳米复合材料的比容量高达2692 mAh g−1，明显优于二元化合物。对应的能量密度分别为391.2、363.2、328.2 J/mA。cm−2，塔菲尔斜率分别为112、129和118 mV/dec。VSM结果表明，NiO/Co3O4、Fe2O3/Co3O4和Fe2O3/NiO/Co3O4纳米复合材料的保留率分别为1.49、2.53和1.03 emu/g。能量色散x射线（EDX）光谱证实了Co， O， Fe和Ni元素的存在。这些发现突出了基于co3o4的NiO/Fe2O3纳米复合材料作为高性能能源和数据存储应用的有希望的候选者的潜力。
{"title":"Eco-friendly hydrothermal synthesis of Co3O4-based NiO–Fe2O3 binary and ternary nanocomposites for electrochemical energy storage applications","authors":"Khalid Saifullah , Kamran Ullah , Najmul Hassan , Tayyaba Shireen , Salah Knani , Vineet Tirth , Ali Algahtani , 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, Co<sub>3</sub>O<sub>4</sub>-based NiO-Fe<sub>2</sub>O<sub>3</sub> 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-Co<sub>3</sub>O<sub>4</sub>) and ternary Fe<sub>2</sub>O<sub>3</sub>-NiO-Co<sub>3</sub>O<sub>4</sub> 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<sup>−1</sup> for the Fe<sub>2</sub>O<sub>3</sub>-NiO-Co<sub>3</sub>O<sub>4</sub> nanocomposite, significantly surpassing the binary compound. The corresponding energy densities were 391.2, 363.2, 328.2 J/mA.cm<sup>−2</sup>, 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/Co<sub>3</sub>O<sub>4</sub>, Fe<sub>2</sub>O<sub>3</sub>/Co<sub>3</sub>O<sub>4</sub>, and Fe<sub>2</sub>O<sub>3</sub>/NiO/Co<sub>3</sub>O<sub>4</sub> nanocomposite. The energy dispersive x-rays (EDX) spectroscopy confirmed the presence of Co, O, Fe, and Ni elements. These findings highlight the potential of Co<sub>3</sub>O<sub>4</sub>-based NiO/Fe<sub>2</sub>O<sub>3</sub> 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}
Pub Date : 2025-08-16DOI: 10.1016/j.elecom.2025.108033
Manish Kumar Singla , S.A. Muhammed Ali , Jyoti Gupta , Pradeep Jangir , Arpita , Ramesh Kumar , Reena Jangid , Mohammad Khishe
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 PV curves, closely matching experimental data. BfOA's efficiency and robustness make it well-.
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.
{"title":"Seven-parameter PEMFC model optimization using an battlefield optimization algorithm","authors":"Manish Kumar Singla , S.A. Muhammed Ali , Jyoti Gupta , Pradeep Jangir , Arpita , Ramesh Kumar , Reena Jangid , 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}
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.
{"title":"Activity and stability proxies for automated evaluation of IrOx electrocatalysts under variable operating conditions","authors":"Guanqi Huang , Carlota Bozal-Ginesta , 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}
Pub Date : 2025-08-12DOI: 10.1016/j.elecom.2025.108025
Jie Zhang , Yuanying Shi , Liming Liu , Bin Qiu , Yue Tian , Guodong Guo
In this work, a novel homogeneous electrochemical (HEC) sensing strategy was developed for carcinoembryonic antigen (CEA) detection, addressing limitations of traditional electrochemical platforms that necessitate complex electrode modifications and receptor immobilization protocols. This approach integrates platinum nanoparticle-loaded UiO-66 metal-organic frameworks (Pt/UiO) as an oxidase-like nanozyme with CEA-specific aptamer (Apt) as recognition element, establishing a target-responsive catalytic mechanism. In solution-phase operation, the Pt/UiO nanozyme facilitates the oxidation of 1,2-diaminobenzene into electroactive diaminophenazine (DAP), generating measurable reduction current at unmodified electrode. Apt adsorption onto Pt/UiO surfaces effectively inhibits this enzymatic activity through steric hindrance, resulting in current suppression proportional to Apt coverage. The presence of CEA induces specific Apt-CEA binding, resulting Apt away from the nanozyme surface and restoring catalytic activity in a concentration-dependent manner. Optimization of experimental parameters (e.g., nanozyme concentration, incubation time) enabled the sensor to achieve a detection limit of 3 pg mL−1 with a linear range spanning 0.01–11 ng mL−1, demonstrating potential for point-of-care applications in tumor biomarker analysis.
在这项工作中，开发了一种用于癌胚抗原（CEA）检测的新型均相电化学（HEC）传感策略，解决了传统电化学平台需要复杂电极修饰和受体固定方案的局限性。该方法将负载铂纳米粒子的UiO-66金属有机框架（Pt/UiO）作为类氧化酶纳米酶，以cea特异性适配体（Apt）作为识别元件，建立靶响应催化机制。在液相操作中，Pt/UiO纳米酶促进1,2-二氨基苯氧化成电活性二氨基苯（DAP），在未修饰的电极上产生可测量的还原电流。Apt在Pt/UiO表面的吸附通过位阻有效地抑制了这种酶的活性，导致电流抑制与Apt覆盖成正比。CEA的存在诱导特异性的Apt-CEA结合，导致Apt远离纳米酶表面，并以浓度依赖的方式恢复催化活性。优化实验参数（例如，纳米酶浓度，孵育时间）使传感器达到3 pg mL - 1的检测限，线性范围为0.01-11 ng mL - 1，显示了在肿瘤生物标志物分析中的即时应用潜力。
{"title":"Homogeneous electrochemical detection of carcinoembryonic antigen based on target-controlled catalytical reaction of platinum/UiO-66 MOFs nanozyme integrated with aptamer","authors":"Jie Zhang , Yuanying Shi , Liming Liu , Bin Qiu , Yue Tian , Guodong Guo","doi":"10.1016/j.elecom.2025.108025","DOIUrl":"10.1016/j.elecom.2025.108025","url":null,"abstract":"<div><div>In this work, a novel homogeneous electrochemical (HEC) sensing strategy was developed for carcinoembryonic antigen (CEA) detection, addressing limitations of traditional electrochemical platforms that necessitate complex electrode modifications and receptor immobilization protocols. This approach integrates platinum nanoparticle-loaded UiO-66 metal-organic frameworks (Pt/UiO) as an oxidase-like nanozyme with CEA-specific aptamer (Apt) as recognition element, establishing a target-responsive catalytic mechanism. In solution-phase operation, the Pt/UiO nanozyme facilitates the oxidation of 1,2-diaminobenzene into electroactive diaminophenazine (DAP), generating measurable reduction current at unmodified electrode. Apt adsorption onto Pt/UiO surfaces effectively inhibits this enzymatic activity through steric hindrance, resulting in current suppression proportional to Apt coverage. The presence of CEA induces specific Apt-CEA binding, resulting Apt away from the nanozyme surface and restoring catalytic activity in a concentration-dependent manner. Optimization of experimental parameters (e.g., nanozyme concentration, incubation time) enabled the sensor to achieve a detection limit of 3 pg mL<sup>−1</sup> with a linear range spanning 0.01–11 ng mL<sup>−1</sup>, demonstrating potential for point-of-care applications in tumor biomarker analysis.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108025"},"PeriodicalIF":4.2,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880403","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}
This study focuses on the high-performance, binder-free electrodes on nickel foam by simple cathodic electrodeposition using nickel chloride, copper sulfate, and thiourea solution as aqueous electrolytes. The CuS, NiS, and NiCuS electrodes synthesized by cathodic electrodeposition were characterized by X-ray diffraction, energy dispersive spectra, and scanning electron microscopy. The electrochemical performance of the synthesized positive electrodes was investigated in aqueous potassium hydroxide electrolyte by widespread electroanalytical techniques such as cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge. The electrochemical tests revealed that the synthesized electrode materials exhibited significant reversible redox reactions. Among the produced electrodes, CuNiS exhibited high specific capacitance (1026.9 F g−1 at 5 mV s−1; 1338.5 F g−1 at 1 A g−1 current density). The produced NiCuS//activated carbon supercapacitor achieved 890 W kg−1 power and 14.9 Wh kg−1 energy density in the potential range from 0 to 1.40 V. The asymmetric supercapacitor reached 157.8 % of the initial discharge capacity at the end of 5000 charge-discharge cycles. The results of this study indicate that the electrodes produced by the cathodic electrochemical deposition method have excellent potential for use as positive electrodes in supercapacitor applications.
本研究以氯化镍、硫酸铜和硫脲溶液为水溶液，采用简单的阴极电沉积方法在泡沫镍上制备高性能无粘结剂电极。采用x射线衍射、能谱和扫描电镜对阴极电沉积法制备的cu、NiS和NiCuS电极进行了表征。利用循环伏安法、电化学阻抗谱、恒流充放电等广泛应用的电分析技术，研究了合成的正极在氢氧化钾水溶液中的电化学性能。电化学测试表明，合成的电极材料表现出明显的可逆氧化还原反应。在所制备的电极中，CuNiS具有较高的比电容（在5 mV s−1时为1026.9 F g−1）；1338.5 F g−1在1a g−1电流密度)。在0 ~ 1.40 V电势范围内，NiCuS//活性炭超级电容器的功率为890 W kg−1，能量密度为14.9 Wh kg−1。在5000次充放电循环结束时，非对称超级电容器达到初始放电容量的157.8%。研究结果表明，用阴极电化学沉积法制备的电极在超级电容器中具有良好的正极应用潜力。
{"title":"Electrodeposition of CuNiS as battery type electrode for supercapacitor applications","authors":"Davut Uzun, Ahsen Albaş, Seyfullah Madakbaş, Ece Kök Yetimoğlu","doi":"10.1016/j.elecom.2025.108024","DOIUrl":"10.1016/j.elecom.2025.108024","url":null,"abstract":"<div><div>This study focuses on the high-performance, binder-free electrodes on nickel foam by simple cathodic electrodeposition using nickel chloride, copper sulfate, and thiourea solution as aqueous electrolytes. The CuS, NiS, and NiCuS electrodes synthesized by cathodic electrodeposition were characterized by X-ray diffraction, energy dispersive spectra, and scanning electron microscopy. The electrochemical performance of the synthesized positive electrodes was investigated in aqueous potassium hydroxide electrolyte by widespread electroanalytical techniques such as cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge. The electrochemical tests revealed that the synthesized electrode materials exhibited significant reversible redox reactions. Among the produced electrodes, CuNiS exhibited high specific capacitance (1026.9 F g<sup>−1</sup> at 5 mV s<sup>−1</sup>; 1338.5 F g<sup>−1</sup> at 1 A g<sup>−1</sup> current density). The produced NiCuS//activated carbon supercapacitor achieved 890 W kg<sup>−1</sup> power and 14.9 Wh kg<sup>−1</sup> energy density in the potential range from 0 to 1.40 V. The asymmetric supercapacitor reached 157.8 % of the initial discharge capacity at the end of 5000 charge-discharge cycles. The results of this study indicate that the electrodes produced by the cathodic electrochemical deposition method have excellent potential for use as positive electrodes in supercapacitor applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108024"},"PeriodicalIF":4.2,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860624","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}
Pub Date : 2025-08-09DOI: 10.1016/j.elecom.2025.108020
H. Alwael , N.A. Asiri , B.G. Alhogbi , A.S. Alharthi , E.A. Bahaidarah , T.N. Abduljabbar , D.F. Baamer , M. Madkour , Faten M. Ali Zainy , M.S. El-Shahawi
{"title":"Corrigendum to “Probe – Integrated electrochemical sensing platform for detection of trace levels of Dapoxetine hydrochloride drug residue in water and drug formulations” [Electrochem. Commun. 173 (2025) 107875]","authors":"H. Alwael , N.A. Asiri , B.G. Alhogbi , A.S. Alharthi , E.A. Bahaidarah , T.N. Abduljabbar , D.F. Baamer , M. Madkour , Faten M. Ali Zainy , M.S. El-Shahawi","doi":"10.1016/j.elecom.2025.108020","DOIUrl":"10.1016/j.elecom.2025.108020","url":null,"abstract":"","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 108020"},"PeriodicalIF":4.2,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858142","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}
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