Electrochemistry Communications最新文献

{"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":"2025-07-23","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":"Thermal annealing-induced structural modifications and electrochemical enhancement of NiO/CNT electrodes synthesized by spray pyrolysis for high-performance supercapacitors","authors":"Oluwasegun Emmanuel Ojodun,&nbsp;Patrick Ehi Imoisili,&nbsp;Tien-Chien Jen","doi":"10.1016/j.elecom.2025.108010","DOIUrl":"10.1016/j.elecom.2025.108010","url":null,"abstract":"<div><div>This work studies the structural and electrochemical characteristics of nickel oxide (NiO) and nickel oxide/carbon nanotubes (NiO/CNT) nanocomposites prepared via spray pyrolysis and annealed at 350, 400, and 500 <span><math><mrow><msup><mrow></mrow><mo>°</mo></msup><mi>C</mi></mrow></math></span>. Structural characterization using X-ray diffraction (XRD) confirms phase purity and crystallinity. The NiO and NiO/CNT samples annealed at 400 °C (400-N and 400-NCT) exhibited optimal performance. Scanning electron microscopy (SEM) images of 400-NCT revealed a compact morphology with well-dispersed CNTs across the NiO nanoparticles. From Brunauer-Emmett-Teller (BET) analysis, its specific surface area was 93.82 m² g⁻¹, broader than 400-N's 35.63 m² g⁻¹, while its pore volume was 0.43 cm³ g⁻¹, larger than 0.13 cm³ g⁻¹ for 400-N. Moreover, 400-NCT displayed higher specific capacitance of 745 F g⁻¹ at 5 A g⁻¹, better rate capability (30.7 %), and superior cycle life (109 % @ 1000 cycles) than 400-N (16.20 F g⁻¹, 26 % rate retention, and 21 % longevity @ 1000 cycles) in 2 M KOH. From electrochemical impedance spectroscopy, 400-NCT portrayed the lowest series and charge transfer resistance (6.60 Ω; 2.28 Ω) than 400-N (7.83 Ω; 20.41 Ω), demonstrating enhanced conductivity. The synergistic combination of CNTs and NiO in the nanocomposite is responsible for the enhanced performance, which boosts the conductivity, enlarges the surface area, and optimizes the pore network for rapid ion transport and enhanced charge storage. These findings show how modifying a process parameter in a facile and affordable method like spray pyrolysis can yield optimal results, contributing to realizing Sustainable Development Goal 7 (SDG 7) of affordable and sustainable energy solutions.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 108010"},"PeriodicalIF":4.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714397","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":"2025-07-23","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":"Corrigendum to “Superior electrochemical performance of CuS/FeSe2 for advanced asymmetric supercapacitor applications” [Electrochem. Commun. 175 (2025) 107915]","authors":"Imran Khan ,&nbsp;Danish Arif ,&nbsp;Atta Ullah Shah ,&nbsp;Kashif Safeen ,&nbsp;Basit Ali ,&nbsp;Gh. Eid ,&nbsp;Wubshet Mekonnen Girma ,&nbsp;Muhammad Shahid Khan ,&nbsp;Adeel Younas Abid ,&nbsp;Akif Safeen","doi":"10.1016/j.elecom.2025.108005","DOIUrl":"10.1016/j.elecom.2025.108005","url":null,"abstract":"","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 108005"},"PeriodicalIF":4.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711867","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":"2025-07-19","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}

{"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":"2025-07-16","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":"Corrigendum to “Conductive disposable screen-printed reduced graphene oxide-molybdenum disulfide electrode for electrochemical sensing applications” [Electrochem. Commun. 166 (2024) 107778]","authors":"Patiya Pasakon ,&nbsp;Vitsarut Primpray ,&nbsp;Jeerakit Thangphatthanarungruang ,&nbsp;Wichayaporn Kamsong ,&nbsp;Anurat Wisitsoraat ,&nbsp;Wanida Laiwattanapaisal ,&nbsp;Varol Intasanta ,&nbsp;Chanpen Karuwan","doi":"10.1016/j.elecom.2025.107993","DOIUrl":"10.1016/j.elecom.2025.107993","url":null,"abstract":"","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107993"},"PeriodicalIF":4.7,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711866","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":"Cycling stability of lithium-ion batteries with pressure-treated NCM811 cathodes","authors":"Yusuke Abe,&nbsp;Yuki Kumagai,&nbsp;Mahmudul Kabir,&nbsp;Seiji Kumagai","doi":"10.1016/j.elecom.2025.108002","DOIUrl":"10.1016/j.elecom.2025.108002","url":null,"abstract":"<div><div>This study developed an effective approach for improving the cycling performance of NCM811-based lithium-ion batteries (LIBs) at a charge rate of 5C. The charge–discharge performance of LIBs with pressure-treated NCM811 cathodes was investigated. The cathode coating, comprising NCM811, acetylene black, and polyvinylidene fluoride, was compressed at pressures of 10–40 MPa. Galvanostatic charge–discharge tests revealed that a treatment pressure of 40 MPa improved the storage performance at ≥5C under the LIB full-cell configuration. After pressure treatment, NCM811-based LIBs exhibited excellent cycling stability over 500 charge–discharge cycles at 5C. After 500 cycles, energy-dispersive X-ray analysis confirmed that the dissolution of transition metals from the NCM811 cathode and their deposition at the graphite anode were inhibited. High-pressure treatment modified the morphology of the NCM811 cathodes, resulting in favorable electrochemical properties. The proposed NCM811 electrodes are promising for the development of power-type LIBs with high energy densities and long cycle lifetimes.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"178 ","pages":"Article 108002"},"PeriodicalIF":4.7,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696676","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":"Actinobacillus succinogenes in bioelectrochemical systems – Comparative study of redox mediators","authors":"Jan-Niklas Hengsbach ,&nbsp;Marcel Cwienczek ,&nbsp;Janik Haffelder ,&nbsp;Nils Tippkötter ,&nbsp;Roland Ulber","doi":"10.1016/j.elecom.2025.108003","DOIUrl":"10.1016/j.elecom.2025.108003","url":null,"abstract":"<div><div>A promising strategy to enhance biotechnological succinate production with <em>Actinobacillus succinogenes</em> is the fermentation in bioelectrochemical systems (BES), where mediated extracellular electron transfer (MEET) plays a key role. In this context, the choice of redox mediator (RM) is important. However, current studies show a limited selection of RMs, which have only rarely been investigated for <em>A. succinogenes</em>. This study therefore analyses different RMs regarding their efficiency and compatibility with <em>A. succinogenes</em> in cathodic systems. In addition to key parameters such as toxicity, stability and redox potential, the total turnover number (TTN) was used as a performance indicator. Among the RMs tested, neutral red proved to be the most efficient mediator with a TTN value of 160.39 at a concentration of 0.1 mM and 23.32 ± 3.34 at 0.5 mM over 72 h. In contrast, riboflavin, safranin O, resazurin and methylene blue showed far poorer performance due to low TTN values, high toxicity or low stability. In addition, active secretion of endogenous RMs could most likely be excluded. The results prove that neutral red is currently the most suitable RM for the process and at the same time illustrate the considerable potential for optimisation in the development of ideal redox mediators for cathodic electro-fermentation.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"179 ","pages":"Article 108003"},"PeriodicalIF":4.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722278","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":"2025-07-14","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}