{"title":"MoS2 bulk layer-carbon composite for hydrogen evolution reaction: Experimental and theoretical DFT insights","authors":"Avala Ramesh, Sukanti Behera","doi":"10.1016/j.jelechem.2025.119137","DOIUrl":"10.1016/j.jelechem.2025.119137","url":null,"abstract":"<div><div>Monolayer or few-layer of MoS<sub>2</sub> or their composites serves as an excellent electrocatalysts for HER. However, large-scale production requires a cost-effective and simple processes. When a bulk layer is used as an electrocatalyst, scaling up becomes easier and offers significant advantage for the catalysis industry. Hence present study explores the synthesis of bulk MoS<sub>2</sub> and carbon composites of molybdenum disulphide (MoS<sub>2</sub>-C) powder for its potential application in HER through experimental and theoretical DFT approaches. Wet-chemical method was conducted for synthesis in a basic medium and Raman spectroscopy identified MoS<sub>2</sub> bulk layer, having characteristic peaks at 381 cm<sup>−1</sup> (E<sup>1</sup><sub>2g</sub>) and 410 cm<sup>−1</sup> (A<sub>1g</sub>) and separation between two peaks <span><math><mo>∆</mo></math></span>k value of 29 cm<sup>−1</sup>. The electrocatalytic HER performance of bulk MoS<sub>2</sub>-C composite exhibited the highest efficiency, achieving a low overpotential of 470 mV @10 mA/cm<sup>2</sup> of current density. To further understand the position and nature of hydrogen adsorption on samples, the DFT was explored. The findings of the hydrogen adsorption Gibbs free energy calculation show that the hydrogen adsorption on the position-2 (distance 2.21 Å) sulphur site is the most stable adsorption configuration for HER activity, compared to a position-1 site of carbon composite MoS<sub>2</sub>. This occurs due to the high density of electrons near fermi level which is helpful for hydrogen adsorption. Moreover, the present work will stimulate the researcher to enhance HER efficiency for other transition metal dichalcogenides (TMD viz. WS<sub>2</sub>, VS<sub>2</sub>) bulk layers.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"989 ","pages":"Article 119137"},"PeriodicalIF":4.1,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888031","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}
Xiaohu Wang , Junhui Dong , Jie Ren , Ding Nan , Na Huang , Jihui Li , Jun Liu
{"title":"Storage mechanisms, modification strategies, and prospects of hard carbon anode for sodium-ion batteries","authors":"Xiaohu Wang , Junhui Dong , Jie Ren , Ding Nan , Na Huang , Jihui Li , Jun Liu","doi":"10.1016/j.jelechem.2025.119152","DOIUrl":"10.1016/j.jelechem.2025.119152","url":null,"abstract":"<div><div>Hard carbon (HC) functions as a crucial anode component in sodium-ion batteries (SIBs), distinguished by its substantial specific capacity, extended lifespan, and excellent cycling performance. Given the swift growth of electric vehicles and sustainable energy storage applications, the requirement for efficient SIBs has surged, prompting considerable advancements in HC anode research. Diverse synthesis techniques, including high-temperature pyrolysis, chemical vapour deposition, and solvothermal methods, have been developed to produce HC materials exhibiting varied morphologies and structures, thereby accommodating different application requirements. Additionally, surface and doping modifications to HC materials have demonstrated improvements in their electrochemical performance. Structural optimisation remains a focal area, as enhancements to pore structure, specific surface area, and conductivity have proven effective in elevating electrochemical performance. This review examines the storage pathways and modification approaches of HC anodes in SIBs and explores potential future applications of these materials in SIB technology. In addition, the development status of hard carbon anode materials based on various types of coal as precursors is summarized, and feasible views are put forward for the bottleneck of their industrial application.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119152"},"PeriodicalIF":4.1,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883142","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":"Iron-doped nickel cobalt oxide nanorods composited with nitrogen and sulfur co-doped reduced graphene oxide for electrocatalytic oxygen evolution reaction","authors":"N. Durga Sri, Thandavarayan Maiyalagan","doi":"10.1016/j.jelechem.2025.119138","DOIUrl":"10.1016/j.jelechem.2025.119138","url":null,"abstract":"<div><div>Developing a cost-effective and highly active electrocatalyst for the oxygen evolution reaction (OER) remains a key factor in advancing sustainable energy conversion technologies. Nickel cobaltite (NiCo<sub>2</sub>O<sub>4</sub>) with its availability of redox couples and stable spinel structure stands out as an effective OER electrocatalyst. While the low conductivity and limited surface area restricts their use. To resolve the addressed issues, our work focuses on doping Fe in NiCo<sub>2</sub>O<sub>4</sub> as an efficient way to modulate the electronic structure leading to enhanced electrical conductivity and the incorporation of nitrogen and sulfur co-doped reduced graphene oxide which would increase the surface area and durability of nickel cobalt oxide. Herein, we designed a Fe doped nickel cobalt oxide nanorods composited with N,S-rGO by a hydrothermal method followed by calcination. The prepared electrocatalyst with overpotential of 300 mV at current density of 10 mA/cm<sup>2</sup> in 1 M KOH exhibited 65 h stability. The improved catalytic activity at the presence of Fe<sup>3+</sup> sites in nickel cobaltite would enhance charge and electron transfer pathways. This doping tends to induce the formation of highly active oxidation states of Co<sup>3+</sup> and Ni<sup>3+</sup> thus maximizing the formation of Ni<img>O and Co<img>O bonds which enhances the adsorption and desorption of OER intermediates. Therefore, Fe doped nickel cobalt oxide composited with a co-doped reduced graphene oxide could be a promising, efficient, and durable OER electrocatalyst in alkaline medium.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"989 ","pages":"Article 119138"},"PeriodicalIF":4.1,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143888115","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":"Facile synthesis of Nano-SiO2@RF@TiO2 anode for lithium-ion batteries","authors":"Haiping Lei , Yiwa Luo , Suqin Li , Jiguo Tu","doi":"10.1016/j.jelechem.2025.119140","DOIUrl":"10.1016/j.jelechem.2025.119140","url":null,"abstract":"<div><div>Silicon dioxide (SiO<sub>2</sub>), attributed to its exceptional specific capacity, vast resource availability, and cost-effectiveness, has emerged as a promising anode candidate for lithium-ion batteries. Nevertheless, its inherent drawbacks of poor electrical conductivity and pronounced volume expansion during charge/discharge cycles pose significant obstacles to widespread adoption. To address these challenges, innovative strategies involving the design of nanostructured SiO<sub>2</sub> and its integration with coatings have been explored. The unique structure of the resultant SiO<sub>2</sub>-based composites (SiO<sub>2</sub>@RF@TiO<sub>2</sub>) profoundly facilitates the swift diffusion of both Li<sup>+</sup> ions and electrons, enhances the accessibility of active sites for Li<sup>+</sup> insertion, and effectively accommodates the volume fluctuations of SiO<sub>2</sub> during operation. The SiO<sub>2</sub>@RF@TiO<sub>2</sub> composite demonstrates remarkable performance, exhibiting a superior specific capacity of 502 mA h g<sup>−1</sup> at a current density of 100 mA g<sup>−1</sup>, outstanding rate capability and enhanced cycling stability (retaining 323 mA h g<sup>−1</sup> at 200 mA g<sup>−1</sup> after 900 cycles), all of which surpass the SiO<sub>2</sub>@RF, thereby offering a compelling solution for the development of high-performance SiO<sub>2</sub>-based anodes for lithium-ion batteries.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119140"},"PeriodicalIF":4.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865174","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}
Bo Wang , Siji Wei , Hong Deng , Hong Wang , Naiqiang Liu , Xinyue Li
{"title":"Mo/VONC as a polysulfide immobilizer and catalyst to enhance performance of Lithium sulfur batteries","authors":"Bo Wang , Siji Wei , Hong Deng , Hong Wang , Naiqiang Liu , Xinyue Li","doi":"10.1016/j.jelechem.2025.119143","DOIUrl":"10.1016/j.jelechem.2025.119143","url":null,"abstract":"<div><div>The dissolution of polysulfides and the slow conversion reactions of sulfur species represent significant challenges that impede the electrochemical performance of lithium‑sulfur (Li<img>S) batteries. To address these issues, we have developed Mo/VONC, a material derived from molybdenum-doped vanadium-based metal-organic frameworks (MOFs), which serves as both a lithium polysulfide (LiPS) immobilizer and a catalyst. The distinctive “rice-flower rod” morphology of Mo/VONC facilitates enhanced electrolyte penetration and lithium-ion (Li<sup>+</sup>) diffusion. Furthermore, molybdenum (Mo) doping accelerates Li<sub>2</sub>S nucleation and the liquid-solid transition, thereby improving the kinetics of sulfur species transition during the charging and discharging processes. This effectively mitigates the shuttle effect and enhances cycling performance. Li<img>S batteries incorporating Mo/VONC exhibit superior electrochemical performance, retaining a capacity of 564 mAh/g after 200 cycles at 0.5C (82.8 % capacity retention).</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119143"},"PeriodicalIF":4.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869473","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":"Potential-controlled structural evolution of Bromobenzene on Au(111): Insights from in situ STM","authors":"Chiao-An Hsieh , Ezhumalai Yamuna , Shuehlin Yau , Yuh-Lang Lee","doi":"10.1016/j.jelechem.2025.119141","DOIUrl":"10.1016/j.jelechem.2025.119141","url":null,"abstract":"<div><div>The adsorption behavior of bromobenzene (BrB) on an Au(111) electrode was investigated using in situ scanning tunneling microscopy (STM) under potential control in 0.1 M sulfuric and perchloric acid solutions. Real-time STM imaging revealed that BrB adsorption induced immediate structural changes on the Au(111) surface, including the formation of 2.3 Å deep vacancy islands (VIs) and predominantly disordered BrB structures. The preferential interaction of BrB with Au adatoms, rather than the Au(111) terrace, likely drove VI formation. As the potential increased, BrB coverage expanded, leading to a structural transition from 1D molecular chains to 2D arrays, and eventually to a well-ordered 3D multilayer film. Concurrently, the BrB molecular orientation shifted from a flat-lying to an upright configuration. At positive potentials, the multilayer BrB film remained structurally stable but dissolved upon a negative potential shift and irreversibly decomposed at more negative potentials. Additionally, BrB assembled differently in perchloric acid, highlighting the critical role of anions in interfacial organization. Local linear BrB structures preferentially aligned along the 〈121〉 direction of Au(111), forming triangular fractal patterns and an increasingly disordered 3D film at positive potentials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119141"},"PeriodicalIF":4.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865171","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}
Jiali Huang , Weichi Ye , Man Mo , Haiqing Zhan , Zhipeng Li , Yong Yang , Panyu Xiong , Tianshi Xiong , Gangli Zhao , Mingfeng Huang , Liyun Zhang , Chunxia Li , Qingmeng Wei , Xiongqiang Yang , Zhijie Fang , Feng Zhan
{"title":"Self-healing liquid metal-rGO anode via self-assembly driven dynamic encapsulation for stable lithium-ion storage","authors":"Jiali Huang , Weichi Ye , Man Mo , Haiqing Zhan , Zhipeng Li , Yong Yang , Panyu Xiong , Tianshi Xiong , Gangli Zhao , Mingfeng Huang , Liyun Zhang , Chunxia Li , Qingmeng Wei , Xiongqiang Yang , Zhijie Fang , Feng Zhan","doi":"10.1016/j.jelechem.2025.119142","DOIUrl":"10.1016/j.jelechem.2025.119142","url":null,"abstract":"<div><div>Lithium-ion batteries have become dominant in the markets for portable electronic devices and electric vehicles owing to their high energy density and long cycle life. However, traditional alloy-based anode materials (such as Si, Bi, and Sn) still suffer from significant volume expansion, severe electrode pulverization, slow lithium diffusion kinetics, and low Coulombic efficiency. Intrinsic high-capacity liquid metal (LM) materials effectively mitigate the volume deformation of traditional alloy anodes during cycling through their unique deformable liquid properties. Specifically, during delithiation, the ternary alloy solid phase reversibly transforms into a binary liquid structure, and the phase transformation behavior endows the material with self-healing ability, which can spontaneously repair the cracks or pulverized structures generated during cycling. This study proposes a self-assembled dynamic encapsulation strategy based on a Ga<img>Sn eutectic alloy (EGaSn), in which liquid metal nanodroplets are encapsulated via the liquid-phase self-assembly of graphene oxide (GO). The resulting LM-rGO anode exhibits excellent specific capacity (779.29 mAh g<sup>−1</sup> after 100 cycles at 0.5 A g<sup>−1</sup>) and outstanding cycling stability (453.77 mAh g<sup>−1</sup> after 500 cycles at 2 A g<sup>−1</sup>). The encapsulation strategy not only mitigates the volume expansion effect of alloy-based anodes but also enhances the lithium-ion transport kinetics through the synergy between its unique stress-buffering mechanism and the three-dimensional conductive network. This strategy provides an innovative solution for the development of high-performance lithium-ion batteries with self-healing functionalities.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"990 ","pages":"Article 119142"},"PeriodicalIF":4.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917994","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}
Jacopo Strada , Elisa Emanuele , Luca Magagnin , Francesco Nespoli , Benedetto Bozzini
{"title":"Multiphysics modelling for rechargeable zinc-air flow batteries – Part I: A physico-chemical and mathematical reassessment of the model","authors":"Jacopo Strada , Elisa Emanuele , Luca Magagnin , Francesco Nespoli , Benedetto Bozzini","doi":"10.1016/j.jelechem.2025.119136","DOIUrl":"10.1016/j.jelechem.2025.119136","url":null,"abstract":"<div><div>Mathematical modelling of zinc-air flow batteries is a crucial tool for the design of prototypes and their scaleup: these are highly strategic tasks in the current development of this technology. A limited amount of efforts has been devoted to this research and, notwithstanding results of high scientific standard, often the emphasis on applications dominates the methodological one. In this work, we have first reassessed and clarified some physico-chemical complexities aspects of a standard multiphysics model for a zinc-air flow battery with a porous GDE, a metallic Zn anode and a flowing electrolyte, and extended it to the rechargeable case. The model couples: (i) material conservation for oxygen, zincates and hydroxide with (ii) electrodic electrochemistry in the porous cathode and the compact anode, (iii) charge conservation in the electronically conductive region of the GDE and in the electrolyte, (iv) fluid dynamics for both gas and electrolyte. Then, we have employed the model to: (i) predict polarization curves as a function of operating conditions; (ii) map the limiting current density distribution over the Zn anode during charge, as an estimate of shape change. Some of the functionally relevant computed trends are confirmed by a selection of experimental results.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119136"},"PeriodicalIF":4.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869458","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":"Bromide crossover through various perfluorinated cation-exchange membranes in the presence of two cationic components in solution","authors":"O.I. Istakova , D.V. Konev , E.V. Zolotukhina , M.A. Vorotyntsev","doi":"10.1016/j.jelechem.2025.119139","DOIUrl":"10.1016/j.jelechem.2025.119139","url":null,"abstract":"<div><div>Chronoamperometry and steady-state voltammetry data for a specially designed working electrode composed of a Pt disk covered mechanically with various perfluorinated cation-exchange membranes in contact with an external 2 M sulfuric acid solution with addition of various NaBr concentrations have been employed to estimate crossover parameters of bromide ions in relation to redox-flow battery applications. This technically simple but efficient approach has allowed us to determine the values of the diffusion coefficient of the electroactive Br<sup>−</sup> co-ion inside each membrane and of its equilibrium distribution coefficient between the membrane and the outer solution via an express experimental procedure and subsequent simple calculations. These crossover parameters of bromide co-ions have been found for Nafion NR211, Nafion XL, Nafion NR212, Nafion N115, Nafion N117 as well as GP-IEM-103, GP-IEM-105 membranes. Correlation of the steady-state diffusion-limited current due to the bromide oxidation both with its concentration in the outer solution and with the membrane thickness has been analyzed. It has been established that the transport characteristics of the bromide anion are close to each other for all homogeneous membranes under study in contact with a mixed X M NaBr +2 M H<sub>2</sub>SO<sub>4</sub> solution (the value of X varies between 0.125 and 0.75): their values belong to the range from 2.6 10<sup>−6</sup> cm<sup>2</sup> s<sup>−1</sup> to 3.4 10<sup>−6</sup> cm<sup>2</sup> s<sup>−1</sup> for its diffusion coefficient inside membrane and to the range from 0.13 to 0.18 for its distribution coefficient at the membrane/solution boundary. Compared to the homogeneous membranes, the Br<sup>−</sup> anion diffusion inside the heterogenous (Nafion XL) membrane is slower and there is a tendency to its accumulation to a larger amount. Comparison of these results for Nafion NR212 in contact with the NaBr+H<sub>2</sub>SO<sub>4</sub> solution with those previously obtained for the same membrane in contact with the HBr + H<sub>2</sub>SO<sub>4</sub> solution has allowed us to conclude that the applied approximate treatment of experimental data based on the theory of molecular-diffusion transport of this co-ion inside the membrane (without taking into account the migration contribution to the bromide flux owing to the suppression of the electric field by highly mobile H<sup>+</sup> cations) remains applicable for systems where the NaBr concentration inside the external solution does not exceed 0. 75 M.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119139"},"PeriodicalIF":4.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874267","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}
Marcelline Carine Ngo-Ngwem , Thria Alkhaldi , Guy Bertrand Tamne , Justin Claude Kemmegne-Mbouguen , Firmin Parfait Tchoumi , Emmanuel Durand Ngambi , Anayel Nzueton-Fagna , Robert Mokaya
{"title":"Electrochemical behavior and quantification of acetaminophen and tyrosine at clay/activated carbon composite film modified glassy carbon electrode","authors":"Marcelline Carine Ngo-Ngwem , Thria Alkhaldi , Guy Bertrand Tamne , Justin Claude Kemmegne-Mbouguen , Firmin Parfait Tchoumi , Emmanuel Durand Ngambi , Anayel Nzueton-Fagna , Robert Mokaya","doi":"10.1016/j.jelechem.2025.119135","DOIUrl":"10.1016/j.jelechem.2025.119135","url":null,"abstract":"<div><div>A composite (namely Sa-AC) made of 2.5 % of mesoporous carbon and 97.5 % of natural Cameroonian clay was obtained using batch method. As revealed by XRD analysis, the clay within the composite retains its layer structure despite a slight decrease of interlayer space between clay sheets. The as-obtained composite has larger surface area (<em>ca</em> 111 m<sup>2</sup>/g) and high pore volume compared to the pristine clay (90 m<sup>2</sup>/g), which endowed the composite film modified glassy carbon electrode (GCE), designated as Sa-AC/GCE, with a large active surface area and fast electron transfer rate. In contrast to the bare and clay modified electrodes, the composite film modified GCE has (i) good electrocatalytic activity toward acetaminophen (Acet) and Tyrosine (Tyr) via an EC mechanism, and (ii) the reversibility of the electrooxidation of Acet was not affected by the irreversible oxidation of Tyr. Under optimal conditions, and using linear sweep voltammetry, the composite film electrodes were used to simultaneously quantify Acet and Tyr in the range of 0.2 μM to 90 μM for Acet and 0.2 μM to 32 μM for Tyr with LOD of 0.19 μM and 0.23 μM (S/N = 3); LOQ of 0.77 μM and 2.05 μM (LOD = 10 S/M), respectively. The sensitivity of Sa-AC/GCE was estimated to be 0.022 μA/μM for Acet and 0.017 μA/μM for Tyr. In addition, the Sa-AC/GCEs were successful for the quantification of Acet in pharmaceutical medicine and Tyr in a tap water with a good recovery range from 91.30 to 109.44 % for the tablets and 102.47 % for tab water.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"988 ","pages":"Article 119135"},"PeriodicalIF":4.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865172","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}