Journal of Electroanalytical Chemistry最新文献

{"title":"Mitigating effects of heavy metal ions in wastewater with enhanced stability in hydrogen generation","authors":"Sarah AlBlooshi ,&nbsp;Shubra Lalwani ,&nbsp;TieJun Zhang ,&nbsp;Nahla Alamoodi ,&nbsp;Roqaya A. Ismail ,&nbsp;Faisal AlMarzooqi","doi":"10.1016/j.jelechem.2025.119094","DOIUrl":"10.1016/j.jelechem.2025.119094","url":null,"abstract":"<div><div>For sustainable green hydrogen production, it is crucial to prioritize water-energy nexus, especially in water-scarce regions where it is challenging to deploy distilled water for electrolysis. We herein utilized heavy metal wastewater (HMWW) for H₂ generation (HER) but by first eliminating the heavy metal ions using membrane distillation (MD). As HM ions significantly interfere in HER (especially Cu), it is mandatory to utilize techniques such as MD that offer high rejection rate with low energy consumption to provide high quality treated water. The MD-treated water (permeate) was then explored as a water source in electrolyte with Pt/C as commercial HER electrode displayed a 14% decrease in HER overpotential with a 5 Ω decrease in charge transfer resistance in comparison to untreated wastewater (HMWW-feed). The initial studies indicated superior HER performance of permeate over HMWW-feed, probing comprehensive long-term HER electrochemical investigation to observe the prolonged impact of HM ions. From our observations amongst other HM ions in feed, particularly the exposure of Copper (Cu) ions, leading to electrodeposition on Pt/C electrode significantly deteriorated the electrochemical performance. The continuous exposure and electrodeposition of Cu on the Pt/C electrode declined the electrochemical active surface area (ECSA) by 75% in 72 h, leading to a 97% drop in the electrochemical stability of HER activity. On using MD-treated water (permeate), the electrode achieved a stability of 78%, approaching the HER performance of DI water as a water source (98.4%) post 72 h. The impact of HM ions was also reflected in the Faradic efficiency values for H₂ evolution that improved by 26% on using treated wastewater (permeate) instead of HMWW-feed. Therefore, leveraging MD-treated wastewater as a water source can facilitate the emergence of new sustainable solutions for H₂ generation with a low water footprint.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119094"},"PeriodicalIF":4.1,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nuclear magnetic resonance spectroscopy: A comprehensive tool for analyzing liquid products in electrochemical CO2 reduction","authors":"Aymen S. Abu Hatab ,&nbsp;Yahia H. Ahmad ,&nbsp;Mohamed F. Mady ,&nbsp;Yasser Hassan ,&nbsp;Abdelrahman Zkria ,&nbsp;Alessandro Sinopoli ,&nbsp;Aboubakr M. Abdullah ,&nbsp;Siham Y. Al-Qaradawi ,&nbsp;Tsuyoshi Yoshitake ,&nbsp;Mazen Khaled","doi":"10.1016/j.jelechem.2025.119097","DOIUrl":"10.1016/j.jelechem.2025.119097","url":null,"abstract":"<div><div>The electrochemical reduction of carbon dioxide (eCO₂RR) has become a very promising pathway that can be used in the transformation of CO₂ to important chemical products and, thus, is one of the mitigations of climate change and will contribute toward sustainable chemical production. This review aims at presenting the importance of Nuclear Magnetic Resonance spectroscopy (NMR) to analyze and quantify the liquid-phase products obtained by eCO₂RR. This provides a summary regarding the role that NMR plays in the process of reducing carbon dioxide. The following discusses the benefits: identification, complete elucidation, and follow-up on reactions involving CO₂ electro-reduction. Pulse experiments corresponding to different methods for water signal suppression are considered separately, outlining some recent developments in the interference water signal reduction which is very crucial for the correct NMR data acquisition in aqueous electrolytes. Certain selected products are described, like carbon monoxide (CO)-associated liquids, formic acid, methanol, and formaldehyde as examples of the NMR precision for the characterization of important compounds. Further, the quantification of C₂ products such as ethanol and acetate is discussed in order to illustrate how the technique can be applied in the elucidation of reaction mechanisms and optimization of catalyst performance. This review covers challenges, advanced methodologies, and emerging trends in order to underline the transformative role that NMR plays in advancing CO₂ electrochemical reduction toward sustainable chemical synthesis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119097"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of Fe doped Co4S3/Ni3S2 composite for efficient alkaline freshwater and seawater oxidation","authors":"Shuangyan Lin ,&nbsp;Haoran Gao ,&nbsp;Tianle Li ,&nbsp;Zhikun Xu","doi":"10.1016/j.jelechem.2025.119098","DOIUrl":"10.1016/j.jelechem.2025.119098","url":null,"abstract":"<div><div>One of the most important and fundamental challenges for the production of hydrogen through seawater electrolysis is constructing strong and high-activity oxygen evolution reaction (OER) catalysts. In this paper, Fe-doped Co₄S₃/Ni₃S₂ (Fe-Co₄S₃/Ni₃S₂) composite was prepared by a one-step hydrothermal method. The doped Fe in Co₄S₃/Ni₃S₂ composite modifies the electronic structure and promotes electron transfer, leading to improved OER performance in alkaline freshwater and seawater. At 100 mA/cm⁻², Fe-Co₄S₃/Ni₃S₂ exhibits low overpotentials of 329 and 361 mV in alkaline freshwater and seawater, respectively. In particular, the overpotential in alkaline freshwater is reduced by 85 mV compared to the Co₄S₃/Ni₃S₂, and 112 and 145 mV compared to single-phase Co₄S₃ and Ni₃S₂. Additionally, the Fe-Co₄S₃/Ni₃S₂ can operate steadily at 100 mA cm⁻² for at least 100 h in alkaline seawater. The current study provides a facile method for preparation of efficient OER catalysts of sulfides by Fe doping in composite.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119098"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting Li+ transport kinetics and structural stability of Co-free LiNi0.9Mn0.1-xAlxO2 cathode materials","authors":"Xiaoyi Hou ,&nbsp;Leilei Hu ,&nbsp;Yibo Zhang ,&nbsp;Liang Zhao ,&nbsp;Xi Wu ,&nbsp;Haozhe Wu ,&nbsp;Yan Tan ,&nbsp;Yulong Kang ,&nbsp;Jiatai Wang","doi":"10.1016/j.jelechem.2025.119092","DOIUrl":"10.1016/j.jelechem.2025.119092","url":null,"abstract":"<div><div>This study successfully synthesized Li[Ni_0.9Mn_0.06Al_0.04]O₂ (NMA964) cathode material using an organic amine co-precipitation method combined with high-temperature solid-state synthesis. Mechanistic insight into Al³⁺ doping via theory-experiment synergy revealed that Al³⁺ doping plays a dual role in enhancing structural stability and electrochemical performance. First-principles calculations demonstrated that Al<img>O covalent bonds effectively suppress cation mixing and mitigate anisotropic stress during H2-H3 phase transitions, while experimental analyses confirmed that these bonds stabilize the host lattice against crack propagation. Additionally, Al³⁺ doping optimizes Li⁺ transport kinetics by reducing electrostatic repulsion between adjacent Li layers. As a result, the NMA964 cathode delivers an ultrahigh initial discharge capacity of 228.3 mAh g⁻¹ at 0.1C (2.5–4.3 V) and retains 165.9 mAh g⁻¹ after 100 cycles at 0.5C (72.6 % capacity retention), outperforming the undoped Li[Ni_0.9Mn_0.1]O₂ counterpart. This work provides atomic-level guidance for designing high-energy cathodes through targeted doping.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119092"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesize of NiSe2/Mo-MOF nanocomposite for sensitive determination of antiretroviral agent dolutegravir in pharmaceutical formulations and biological fluids","authors":"Edoh Nicodème Gabiam ,&nbsp;Nevin Erk ,&nbsp;Asena Ayse Genc ,&nbsp;Wiem Bouali ,&nbsp;Mustafa Soyla ,&nbsp;Qamar Salamat ,&nbsp;Hassan Elzain Hassan Ahmed","doi":"10.1016/j.jelechem.2025.119096","DOIUrl":"10.1016/j.jelechem.2025.119096","url":null,"abstract":"<div><div>The precise detection of antiretroviral agents, such as Dolutegravir (DTG), is essential for effective HIV treatment and optimal patient management. This study presents the synthesis of NiSe₂/Mo-MOF nanocomposite and its application as a modifier for the accurate detection of DTG in pharmaceutical formulations and biological fluids. NiSe₂ nanocrystals were synthesized using a modified hydrothermal method and subsequently incorporated into a Mo-MOF matrix through a solvothermal process. Characterization of the nanocomposite was performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and electrochemical impedance spectroscopy (EIS). Electrochemical investigations demonstrated that the NiSe₂/Mo-MOF sensor exhibited excellent sensitivity, selectivity, and reproducibility, with a low detection limit of 3.68 nM for DTG. The superior performance of the sensor can be attributed to the synergistic interaction between NiSe₂ and Mo-MOF. This study demonstrates the potential of NiSe₂/Mo-MOF nanocomposites as efficient, reliable, and cost-effective electrochemical sensors, providing a promising platform for drug monitoring in clinical and pharmaceutical applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119096"},"PeriodicalIF":4.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and electrochemical performance evaluation of lithiophilic dual-interface layers for high-rate lithium metal batteries","authors":"Yu Lin,&nbsp;Hong Chen,&nbsp;Weimin Chen","doi":"10.1016/j.jelechem.2025.119091","DOIUrl":"10.1016/j.jelechem.2025.119091","url":null,"abstract":"<div><div>Lithium metal batteries (LMBs) are regarded as the paradigm of next-generation high-energy-density batteries, attributable to their exceptionally high theoretical specific capacity. However, the commercialization process of LMBs is impeded by severe dendrite growth, uncontrolled volume expansion, and unstable solid electrolyte interphase (SEI). Herein, by coating a trace of Al protective layer on the separator towards the lithium metal anode and modifying a layer of lithiophilic TiN on the conductive carbon cloth, lithiophilic dual-interface (Al-CFC@TiN-Li) synergistic protective layers are ingeniously designed and constructed, which effectively enhances the adsorption and desorption kinetics during the electrochemical cycle. Therefore, the provision of lithium nucleation sites during the plating/stripping process facilitates the ultra-fast transport of lithium ions and ensures a uniform lithium ion flux, thereby achieving ultra-high cycle stability (no short circuit at high current density (6 mA cm⁻²) and high area capacity (10 mAh cm⁻²)), exceptional capacity retention (a capacity retention of 92.6 % for Li||LFP cells over 400 cycles), and universal adaptability (adapted to the NCM523 cathode). This work provides a facile strategy for constructing high-performance LMBs, offering more possibilities for the practical application of LMBs.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119091"},"PeriodicalIF":4.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling novel capacity (electro)recovery for Chloranilate-based alkaline redox flow batteries","authors":"Ali Tuna ,&nbsp;Vahid Abbasi ,&nbsp;Carita Kvarnström ,&nbsp;Pekka Peljo","doi":"10.1016/j.jelechem.2025.119081","DOIUrl":"10.1016/j.jelechem.2025.119081","url":null,"abstract":"<div><div>This study monitors a two-electron chloranilate-ferrocyanide redox flow battery system in alkaline media at 1.1 V, focusing on capacity recovery during charge-discharge operations. Capacity decay is relatively stabilized and restored via electrochemical oxidation process at certain steps. Different concentrations and cycle performances are also tested.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119081"},"PeriodicalIF":4.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-sensitive detection of dopamine using oxygen plasma-treated Ti3C2Tx-modified carbon electrodes: DFT and experimental investigations","authors":"Jing Wang ,&nbsp;Long Zhao ,&nbsp;Jing Su ,&nbsp;Haiying Du ,&nbsp;Qiang Shao ,&nbsp;Liding Wang","doi":"10.1016/j.jelechem.2025.119077","DOIUrl":"10.1016/j.jelechem.2025.119077","url":null,"abstract":"<div><div>Dopamine (DA) plays a critical role in various neurological disorders, including Parkinson's disease and schizophrenia, making its accurate and ultra-sensitive detection crucial for early diagnosis and treatment. In this study, a novel electrochemical sensor for DA detection was developed using monolayer Ti₃C₂T_x Mxene material treated with oxygen plasma. The oxygen plasma treatment significantly enhanced the surface activity and electronic transport capabilities of Ti₃C₂T_x, resulting in an ultra-low detection limit of 0.005 nM for DA. Electrochemical tests demonstrated the sensor's excellent sensitivity, stability, and performance. To further elucidate the underlying mechanisms of enhanced electrochemical performance, density functional theory (DFT) calculations were employed to investigate the impact of oxygen plasma treatment on the electronic structure of Ti₃C₂T_x. The DFT results revealed that the oxygen plasma treatment notably increased the number of active sites by introducing more oxygen-terminated functional groups on the surface of Ti₃C₂T_x. These oxygenated functional groups acted as catalysts, lowering the activation energy required for DA electrochemical reactions. Additionally, the oxygen plasma treatment effectively reduced the lattice constant of Ti₃C₂T_x, improving its internal electronic transport properties and thus enhancing its conductivity. The theoretical studies are in strong agreement with the experimental results, providing a clear understanding of the interaction between DA molecules and the oxygen-functionalized Ti₃C₂T_x surface. This research highlights the potential of oxygen plasma-treated Ti₃C₂T_x as a high-performance electrochemical sensing material and offers new perspectives for the development of sensitive biosensors.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119077"},"PeriodicalIF":4.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-performance capacitors based on in situ Ni-doped CoMoO4@CNTs composites","authors":"Mingwei Li,&nbsp;Yuhan Zou,&nbsp;Hongxun Zhang,&nbsp;Fang Yang","doi":"10.1016/j.jelechem.2025.119082","DOIUrl":"10.1016/j.jelechem.2025.119082","url":null,"abstract":"<div><div>In situ Ni-doped CoMoO₄@CNTs composites were synthesized using nickel nitrate formed on nitric acid-pretreated nickel foam as a nickel source. Due to the participation of nickel foam in the synthesis of CoMoO₄@CNTs, the nickel foam is firmly bonded to the composite, which is beneficial for the structural stability during cycling. The addition of CNTs alters the dispersion and interfacial properties of the reactive precursor in an aqueous solution, leading to a morphological change in the nanosheets. The in situ Ni-doped CoMoO₄@CNTs nanomaterials with 20, 30, 40, and 50 mg CNTs added exhibit specific capacitances of 4150, 4460, 4800, and 4630 mF·cm⁻² at 10 mA·cm⁻², respectively. These values are significantly higher than those of Ni-doped CoMoO₄ synthesized without CNTs (3730 mF·cm⁻²). An asymmetric supercapacitor (ASC) assembled using the Ni-doped CoMoO₄@CNTs electrode material (with 40 mg CNTs) and activated carbon demonstrates a specific capacitance of 884.5 mF·cm⁻² at 10 mA·cm⁻². With a high energy density of 111.82 Wh·kg⁻¹ at a power density of 1280 W·kg⁻¹, the ASC retains 97.6 % of its capacitance after 10,000 cycles.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119082"},"PeriodicalIF":4.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting hydrogen evolution on M-Pt-S (M = VIB Cr, Mo, W) via facile electroreduction and electrodeposition","authors":"Shaofang Shi ,&nbsp;Mengqiu Li ,&nbsp;Jiayun Zeng ,&nbsp;Juan Wang ,&nbsp;Gaofeng Zeng ,&nbsp;Qin Zhong","doi":"10.1016/j.jelechem.2025.119076","DOIUrl":"10.1016/j.jelechem.2025.119076","url":null,"abstract":"<div><div>With the rapid development of renewable energy utilization, hydrogen production by electrochemical water hydrolysis has attracted renewed research interest. The improvement of unit mass activity of low-Pt loading catalysts for hydrogen evolution reaction (HER) and the reduction of cost is attractive and challenging. Herein, the sulfide of the VIB subgroup metal (M = Cr, Mo, W) was prepared by a simple and mild electroreduction method, and Pt nanoparticles were grown on the sulphide of the VIB subgroup by Pulse electrodeposition. The M-Pt-S composite catalysts show excellent HER activity. Especially, Mo-Pt-S shows excellent HER performance (<em>η</em>₁₀ = 30.12 mV) in 0.5 M H₂SO₄ and excellent unit mass activity of 26.63 A mg⁻¹ at 50 mV, which is superior to the corresponding monofunctional Pt noble metal catalyst.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"986 ","pages":"Article 119076"},"PeriodicalIF":4.1,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}