Electrochemistry Communications最新文献

{"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 ,&nbsp;Yuanying Shi ,&nbsp;Liming Liu ,&nbsp;Bin Qiu ,&nbsp;Yue Tian ,&nbsp;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⁻¹ with a linear range spanning 0.01–11 ng mL⁻¹, 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":"2025-10-01","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}

{"title":"Electrodeposition of CuNiS as battery type electrode for supercapacitor applications","authors":"Davut Uzun,&nbsp;Ahsen Albaş,&nbsp;Seyfullah Madakbaş,&nbsp;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⁻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.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108024"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","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}

{"title":"Electrochemical detection of uric acid based on platinum nanoparticles/graphdiyne hybrids","authors":"Yi Zhang ,&nbsp;Chen Ji ,&nbsp;Xingtian Wang ,&nbsp;Bin Qiu ,&nbsp;Huaiyu Chen","doi":"10.1016/j.elecom.2025.108006","DOIUrl":"10.1016/j.elecom.2025.108006","url":null,"abstract":"<div><div>The development of cost-effective and high-performance electrochemical sensors for uric acid (UA) detection is critical due to its role as a key biomarker in disease diagnosis. This study presents an innovative sensor based on platinum nanoparticle (Pt NPs) decorated graphdiyne (GDY) nanohybrid (denoted as Pt NPs/GDY), fabricated via a facile electroless deposition method. The hybrid material capitalizes on the synergistic effects of GDY's π-electron-rich structure - enhancing target affinity through π-π stacking, and Pt NPs' dual functionality as conductivity boosters and catalytic activators. Electrochemical evaluations revealed that the Pt NPs/GDY-modified glassy carbon electrode (GCE) outperforms conventional GDY/GCE and bare GCE, achieving a broad linear range (0.1–7.5 μM) and an ultralow detection limit (30 nM). The sensor also demonstrated exceptional reproducibility, long-term stability, and selectivity against common interferents, validated by successful UA quantification in human urine samples (92.8–98.5 % recovery).</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108006"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144764062","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":"Synthesis and exploration of NiSe2-GO composites as electrocatalysts with high-performance oxygen evolution reaction","authors":"Basit Ali Khan ,&nbsp;Fengqi Zhou ,&nbsp;Tongsheng Zhang ,&nbsp;Shams ur Rahman ,&nbsp;Attia Sadiq ,&nbsp;Farasat Haider ,&nbsp;Fazila Shafique ,&nbsp;Rafaqat Hussain ,&nbsp;Jaweria Khalid","doi":"10.1016/j.elecom.2025.108008","DOIUrl":"10.1016/j.elecom.2025.108008","url":null,"abstract":"<div><div>In this study, NiSe₂/GO composites were successfully synthesized by using a facile and effective chemical method to increase the catalytic activity and charge transfer efficiency for oxygen evolution reaction (OER). The structural analysis confirmed the successful preparation of NiSe₂ and NiSe₂-GO (10 %, 25 %) composites. Similarly, the morphology of NiSe₂ appeared to be nanocubes, whilst NiSe₂-GO (10 %, 25 %) composites revealed features comprising of both NiSe₂ nanocubes and GO sheets. The electrochemical performance of NiSe₂ and NiSe₂-GO (10 %, 25 %) composites was also investigated for enhanced OER. Among the synthesized compositions, NiSe₂–25 % GO demonstrated the most superior electrocatalytic performance, which exhibited a significantly lower Tafel slope (66 mV/dec at 10 mV/s). Electrochemical impedance spectroscopy (EIS) analysis further confirmed the high efficiency of NiSe₂–25 % GO, where a smallest semicircle in the Nyquist plot was observed. In terms of overpotential, NiSe₂–25 % GO achieved a remarkably low value of ∼350 mV, demonstrating superior catalytic efficiency compared to NiSe₂–10 % GO (∼500 mV) and pristine NiSe₂ (∼600 mV). The significantly reduced overpotential suggested that the NiSe₂–25 % GO material required the least energy input to drive the reaction at a given current density. This enhanced performance was attributed to the synergistic effect between NiSe₂ and GO, where the GO matrix provided a favorable pathway for electron transfer, while NiSe₂ acted as an active catalytic site for OER. These findings highlight NiSe₂–25 % GO as a highly effective and promising electrocatalyst for OER applications. Its superior charge transport characteristics, lower overpotential, and faster reaction kinetics make it a strong candidate for next-generation energy conversion and storage technologies.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108008"},"PeriodicalIF":4.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722280","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":"Surface organization of aptamers via diazonium grafting: A key parameter in label-free electrochemical sensing","authors":"Teodora Lupoi ,&nbsp;Bogdan Feier ,&nbsp;Florence Geneste ,&nbsp;Cecilia Cristea ,&nbsp;Yann R. Leroux","doi":"10.1016/j.elecom.2025.108000","DOIUrl":"10.1016/j.elecom.2025.108000","url":null,"abstract":"<div><div>The spatial arrangement of biorecognition molecules on the sensor surface plays a critical role in determining the performance of electrochemical biosensors. In this work, we report a covalent and tunable immobilization strategy using aryl diazonium chemistry to functionalize carbon electrodes with ethynyl groups protected by trimethylsilyl (TMS) or triisopropylsilyl (TIPS) moieties. After deprotection, an azide-modified aptamer (APT) specific to diclofenac (DCF) was immobilized via copper-catalyzed azide–alkyne cycloaddition (CuAAC). Although the TMS and TIPS groups differ in size by only 1.7 Å, this small variation significantly influenced APT spacing and sensor performance. The TIPS-based sensor displayed a nearly fourfold increase in signal response compared to the TMS-based counterpart, achieving a limit of detection of 17.95 μM. These results underscore the importance of nanoscale molecular design in optimizing label-free aptasensor sensitivity.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 108000"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653705","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":"Electrodeposition of p-type Cu2O on n-type TiO2 nanosheet arrays for enhanced photoelectrochemical water splitting","authors":"Lin Wang ,&nbsp;Hai Yu ,&nbsp;YaXin Wang ,&nbsp;Chun Miao ,&nbsp;QianQian Lei ,&nbsp;XinPing Yao ,&nbsp;XiaoChen Yao ,&nbsp;Xin Wei ,&nbsp;JianGuo Lv ,&nbsp;Yan Xue ,&nbsp;JingWen Zhang ,&nbsp;SiWen Zhou ,&nbsp;DanDan Qu","doi":"10.1016/j.elecom.2025.108009","DOIUrl":"10.1016/j.elecom.2025.108009","url":null,"abstract":"<div><div>This study synthesized p-type Cu₂O using an electrodeposition method and firmly attached it to TiO₂ nanosheets based on fluorine-doped tin oxide (FTO) substrates, forming a dense film that serves directly as a photoanode for photoelectrochemical (PEC) water splitting. Characterization techniques such as XRD, SEM, XPS, and UV–Vis confirmed the successful deposition of Cu₂O on the TiO₂ nanosheets, forming a p-n heterojunction structure. The incorporation of Cu₂O effectively broadened the light absorption range of TiO₂, with a cut-off wavelength red-shifting to 537 nm, enabling it to absorb more visible light. Photoelectrochemical tests showed that under illuminated unbiased conditions, the photocurrent density of Cu₂O-TiO₂ reached 0.3 mA/cm², which is 7.5 times that of TiO₂. After applying a small bias (0.5 V), the photocurrent density further increased to 2.1 mA/cm², 5.2 times that under unbiased conditions, indicating that the introduction of electricity effectively accelerated the separation efficiency of photo-generated carriers. The Cu₂O-TiO₂ heterojunction exhibited significantly higher photocurrent density (measured by LSV) and charge transfer efficiency (evaluated by EIS) than pure TiO₂. This research provides new insights for PEC water splitting technology and serves as a reference for designing high-performance photocatalysts.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 108009"},"PeriodicalIF":4.2,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721287","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":"Urea electrooxidation coupled with energy-saving H2 production using bimetallic sulfide heterojunctions","authors":"Suzhen Bai ,&nbsp;Kesheng Cao ,&nbsp;Yi Zeng ,&nbsp;Zhengshan Tian ,&nbsp;Xiangxiang Du ,&nbsp;Xingqun Zheng","doi":"10.1016/j.elecom.2025.107999","DOIUrl":"10.1016/j.elecom.2025.107999","url":null,"abstract":"<div><div>The theoretical electrocatalytic potential for the urea oxidation reaction (UOR) is notably low at 0.37 V, positioning it as a promising alternative to hydrogen evolution reaction for traditional water electrolysis. In this study, we synthesized Ni_xS₆/MnS (NMS) heterojunction catalysts using a straightforward co-precipitation method. Initially, we prepared bimetallic hydroxides precursors (Ni/Mn(OH)₂), which were subsequently sulfurized to obtain the NMS heterojunctions. The formation of NMS heterojunctions could enhance charge transfer and improve electrical conductivity, significantly boosting the electrocatalytic UOR activity. The NMS heterojunctions facilitate electrocatalytic UOR at a low anodic potential of 0.7 V vs. Ag/AgCl, achieving a peak current density of 11.8 mA cm⁻², with effective electrochemical surface area and Tafel slope values of 6.23 mF cm⁻² and 78.3 mV dec⁻¹, respectively. Furthermore, when utilized as an anode for overall urea electrolysis within a dual-electrode system, the NMS heterojunctions obtained a higher current density of 13.2 mA cm⁻², double that of pure water electrolysis (6.1 mA cm⁻²). This work represents a significant advancement in employing nickel-based sulfide heterojunctions for catalyzing urea oxidation reaction.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107999"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663595","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":"Anode catalyst layer optimization in polymer electrolyte membrane water electrolysis: Modeling catalyst layer properties and interface effects","authors":"Tien-Ching Ma ,&nbsp;Andreas Hutzler ,&nbsp;Richard Hanke-Rauschenbach ,&nbsp;Simon Thiele","doi":"10.1016/j.elecom.2025.107965","DOIUrl":"10.1016/j.elecom.2025.107965","url":null,"abstract":"<div><div>The design of the anode catalyst layer (ACL) and its interface to the porous transport layer (PTL) significantly influence cell behavior of proton exchange membrane water electrolysis (PEMWE). To understand the complex interaction between the two layers and its interface on cell performance, modeling approaches are necessary. In this study, we present an efficient single-phase two-dimensional model resolving both in-plane and through-plane directions of the interface and the catalyst layer. It is validated both by experimental tomographic data and polarization curves. We find that the single-phase model describes polarization behavior well at low current densities. For higher current densities deviations can be found. While the model provides quantitative predictions for most cases, the absence of detailed two-phase flow modeling may limit its accuracy at high current densities where liquid-gas interactions become more dominant. For one sample showing larger deviations at higher potentials, we apply a simple two-phase model, which seems to explain the deviations. We apply the model to determine the optimal ACL/PTL interface configurations for ACLs with various electrical conductivities. The model reveals that a tenfold increase in electrical conductivity can result in a doubling of cell current density. By explaining interactions between ACL properties, ACL/PTL design and ACL performance, the model fosters to accelerate future optimization.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107965"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190263","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 review article on: Voltammetric detection of lead, mercury, chromium, and arsenic metal ions from environmental samples","authors":"Andualem Ejigu ,&nbsp;Molla Tefera ,&nbsp;Atnafu Guadie","doi":"10.1016/j.elecom.2025.107996","DOIUrl":"10.1016/j.elecom.2025.107996","url":null,"abstract":"<div><div>Detecting hazardous heavy metals like lead, cadmium, mercury, and arsenic is a significant global issue because of their high toxicity and environmental durability. While traditional laboratory methods provide accurate results, their high cost, complexity, and slow processing times restrict their practicality for widespread, on-site monitoring. In this regard, electrochemical techniques, especially voltammetry, have become a strong alternative, delivering a great mix of high sensitivity, portability, and affordability.</div><div>This review highlights recent advancements in innovative electrode materials, such as graphene-modified electrodes and sensors enhanced with metal nanoparticles, along with advanced stripping techniques like anodic stripping voltammetry (ASV) and square wave voltammetry (SWV). Thanks to these advancements, detection limits have improved significantly, often reaching the parts per billion (ppb) range, while the selectivity for specific metal ions has also been enhanced.</div><div>Additionally, the review critically examines methods for analyzing water, soil, and sediment samples, showcasing the promising capabilities of nanocomposite materials that greatly increase sensitivity and stability. It also emphasizes the importance of standardized protocols for reliable comparisons and discusses future research directions, including the development of new nanocomposite materials and the integration of these advanced ‘nanosensors’ into portable devices for real-time environmental monitoring.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 107996"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144653704","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":"Phase- and morphology-controlled MnO2: Its synthesis and influence on the electrochemical performance of spinel LiMn2O4 cathode materials","authors":"Young Ji Park ,&nbsp;Sang Hyo Jeong ,&nbsp;Younki Lee ,&nbsp;Tae Wook Kang ,&nbsp;Sun Woog Kim","doi":"10.1016/j.elecom.2025.108001","DOIUrl":"10.1016/j.elecom.2025.108001","url":null,"abstract":"<div><div>In this study, MnO₂ was synthesized via a hydrothermal method using four different oxidizing agents: KMnO₄, K₂S₂O₈, KClO₃, and (NH₄)₂S₂O₈. The KMnO₄ precursor led to the formation of aggregated α-MnO₂, while K₂S₂O₈ produced a mixed phase of α- and γ-MnO₂. (NH₄)₂S₂O₈ promoted the formation of γ-MnO₂ at lower temperatures and induced a structural transition to β-MnO₂ at elevated temperatures. Among the lithium precursors investigated, LiOH was found to be the most effective in preserving the spherical morphology of LiMn₂O₄ during synthesis. Electrochemical measurements revealed that the LiMn₂O₄ sample synthesized from γ-MnO₂ exhibited the highest charge capacity of 132.59 mAh∙g⁻¹, while the α-MnO₂-based LiMn₂O₄ demonstrated the best stability. These results indicate that the initial MnO₂ phase significantly influences the electrochemical performance of the resulting spinel cathode.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 108001"},"PeriodicalIF":4.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686112","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}