Electrochemistry Communications最新文献_第6页

Markov decision process for current density optimization to improve hydrogen production by water electrolysis 优化电流密度的马尔可夫决策过程提高水电解制氢效率

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-25 DOI: 10.1016/j.elecom.2025.107987

Purnami Purnami , Willy Satrio Nugroho , Wresti L. Anggayasti , Yepy Komaril Sofi'i , I.N.G. Wardana

{"title":"Markov decision process for current density optimization to improve hydrogen production by water electrolysis","authors":"Purnami Purnami , Willy Satrio Nugroho , Wresti L. Anggayasti , Yepy Komaril Sofi'i , I.N.G. Wardana","doi":"10.1016/j.elecom.2025.107987","DOIUrl":"10.1016/j.elecom.2025.107987","url":null,"abstract":"<div><div>Maximizing the hydrogen evolution reaction (HER) remains challenging due to its nonlinear kinetics and complex charge interactions within the electric double layer (EDL). This study introduces an adaptive current density control approach using a Markov Decision Process (MDP) to enhance HER performance in alkaline water electrolysis. The MDP algorithm dynamically adjusts current release timings from three capacitors connected to the cathode based on feedback from hydrogen concentration levels. Results show that this fluctuating control strategy is more effective than static or linearly increasing methods, as it helps minimize overpotential, reduce heat buildup, and prevent hydrogen bubble accumulation. The MDP-optimized system achieved 7460 ppm in 60 min, outperforms the control condition (5802 ppm) produced under uncontrolled conditions. This work highlights a novel application of reinforcement learning to actively regulate electrochemical parameters, offering a promising mechanism for improving electrolyzer efficiency.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107987"},"PeriodicalIF":4.7,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502606","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}

引用次数: 0

Platinum-modified screen-printed carbon electrode integrated with molecularly imprinted polymer for highly selective electrochemical ethanol sensing 铂修饰网印碳电极与分子印迹聚合物集成用于高选择性乙醇电化学传感

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-25 DOI: 10.1016/j.elecom.2025.107986

Wulan Khaerani , Irkham , Uji Pratomo , Adisyahputra , Yasuaki Einaga , Yeni Wahyuni Hartati

{"title":"Platinum-modified screen-printed carbon electrode integrated with molecularly imprinted polymer for highly selective electrochemical ethanol sensing","authors":"Wulan Khaerani , Irkham , Uji Pratomo , Adisyahputra , Yasuaki Einaga , Yeni Wahyuni Hartati","doi":"10.1016/j.elecom.2025.107986","DOIUrl":"10.1016/j.elecom.2025.107986","url":null,"abstract":"<div><div>Ethanol is a type of alcohol often found in beverages, medicines, and fermented products, so an acceptable ethanol detection method is needed. An accurate ethanol detection method is the chromatography method, but its weaknesses are high operational costs and non-portability. Therefore, in this study, an electrochemical analysis technique was developed that can overcome this problem combined with the development of molecularly imprinted polymers (MIPs) for ethanol. MIPs were synthesized using ethanol as a template, methacrylic acid (MAA) as a monomer, divinylbenzene (DVB) as a crosslinker, and benzoyl peroxide (BPO) as an initiator by cooling and heating with cooling at −5 °C for 1 h, and heating at 80 °C for 7 h. The results of the MIPs synthesis were suspended in distilled water and dropped on a screen-printed carbon electrode (SPCE) for electrochemical sensor applications. Previously, SPCE was modified platinum (Pt) by electrodeposition with optimum parameters at a potential of −0.3 V, electrodeposition time of 300 s, and Pt concentration of 0.15 mM. Testing of MIPs-based ethanol sensors electrochemically resulted in detection limits and quantification limits of 0.16 % and 0.28 % for a linear range of 0.5–10 % ethanol, with the precision represented by repeatability and recovery of 3.39 % and 94.94 %, respectively. The SPCE/Pt/MIPs electrochemical sensor can be used in ethanol detection for various analytical purposes.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107986"},"PeriodicalIF":4.7,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489626","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}

引用次数: 0

One-step atmospheric microplasma synthesis of an NMC-type lithium-ion battery cathode nmc型锂离子电池正极一步大气微等离子体合成

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-23 DOI: 10.1016/j.elecom.2025.107985

Ryan Brow, Chaiwat Engtrakul, Kae Fink, Nicholas McKalip, Maxwell Schulze, Andrew Colclasure

引用次数: 0

Extreme fast charging of Lithium-ion batteries using flash graphene additive 使用闪光石墨烯添加剂的锂离子电池极快充电

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-22 DOI: 10.1016/j.elecom.2025.107984

Ulya Saffanah , Winona Avis , Hendri Widiyandari , Arif Jumari , Agus Purwanto

{"title":"Extreme fast charging of Lithium-ion batteries using flash graphene additive","authors":"Ulya Saffanah , Winona Avis , Hendri Widiyandari , Arif Jumari , Agus Purwanto","doi":"10.1016/j.elecom.2025.107984","DOIUrl":"10.1016/j.elecom.2025.107984","url":null,"abstract":"<div><div>The battery can be charged to 80 % of its state of charge (SOC) within 15 min, which is a significant factor contributing to the widespread adoption of electric vehicles (EVs) due to the alleviation of range anxiety. However, the realization of fast charging batteries is hindered by intricate challenges, including lithium-ion diffusion, lithium plating over the anode, charging protocols, and economic considerations. Graphene, renowned for its exceptional conductivity and facilitating lithium transport, emerges as a promising candidate for incorporation into fast-charging batteries. Cost-effectiveness is a key consideration, and alternative low-cost methods for graphene production are essential for the advancement of fast charging battery development. Flash joule heating emerges as a cost-effective approach to convert amorphous hard carbon into flash graphene (FG) as confirms by Raman characterization. Scanning electron microscopy (SEM) characterization reveals that FG exhibits a multilayer structure and a turbostratic pattern with a substantial surface area. Subsequently, FG is incorporated into the NMC811 cathode to fabricate a fast-charging lithium-ion battery. The FG-NMC battery demonstrates an initial specific capacity of 173.2 mAh.g<sup>−1</sup>. The extreme fast charging (XFC) testing procedure (CC-CV protocol at 5C) results in a charging time of 13 min stores 117.6 mAh.g<sup>−1</sup> (SOC of 80.1 %), meeting the criteria for a fast-charging battery. The capacity retention after 150 cycles under extreme charging (5C) and discharging (5C) is 87.4 % demonstrates that FG possesses the potential to be a cost-effective additive for energy-dense fast charging batteries suitable for electric vehicle applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107984"},"PeriodicalIF":4.7,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365386","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}

引用次数: 0

Electrochemical growth of polyaniline films controlled with light 光控制聚苯胺薄膜的电化学生长

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-21 DOI: 10.1016/j.elecom.2025.107983

Ashleigh K. Wilson, Chantel Johnson, Jaycie Jenkins, Asia Jones, Natalia Noginova

引用次数: 0

A sandwich-type electrochemical immunosensor for cardiac troponin I based on β-cyclodextrin functionalized 3D graphene incorporated with Ag nanoclusters 基于β-环糊精功能化三维石墨烯结合银纳米团簇的三明治型心肌肌钙蛋白I电化学免疫传感器

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-17 DOI: 10.1016/j.elecom.2025.107978

Fang Liu, Yingying Gao, Ying Guo, Jianchun Li, Wei Huo, Weiwei Dai

{"title":"A sandwich-type electrochemical immunosensor for cardiac troponin I based on β-cyclodextrin functionalized 3D graphene incorporated with Ag nanoclusters","authors":"Fang Liu, Yingying Gao, Ying Guo, Jianchun Li, Wei Huo, Weiwei Dai","doi":"10.1016/j.elecom.2025.107978","DOIUrl":"10.1016/j.elecom.2025.107978","url":null,"abstract":"<div><div>Cardiac troponin I (cTnI) detection plays a critical role in the early diagnosis of acute myocardial infarction (AMI). In this study, a sandwich-type electrochemical immunosensor was developed for ultrasensitive quantification of cardiac troponin I (cTnI). The sensor platform utilized silver nanoclusters (AgNCs) incorporated with <span><math><mi>β</mi></math></span>-cyclodextrin functionalized 3D porous graphene (<span><math><mi>β</mi></math></span>-CD@3DG-AgNCs) to enhance electrical conductivity and primary antibody (Ab<span><math><msub><mrow></mrow><mrow><mn>1</mn></mrow></msub></math></span>) immobilization. For signal amplification, ferrocenecarboxylic acid combined with <span><math><mi>β</mi></math></span>-CD@3DG (<span><math><mi>β</mi></math></span>-CD@3DG-Fc-COOH) was employed as the signal probe, which demonstrated excellent secondary antibody (Ab<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>) capture capability. The synthesized nanomaterials were characterized using SEM, TEM, FTIR spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and Thermo-Gravimetric Analysis (TGA). The electrochemical performance of the surface-modified electrodes was systematically investigated through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Under optimized conditions, differential pulse voltammetry (DPV) revealed that the developed sensor exhibited an extensive linear response range (100 fg mL<sup>−1</sup>–100 ng mL<sup>−1</sup>) for cTnI quantification, with an exceptionally low detection limit of 45.5 fg mL<sup>−1</sup>. The recovery rate ranging from 97.39% to 102.83% was achieved in human serum analysis, suggesting the potential applicability of this immunosensor for clinical diagnosis.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107978"},"PeriodicalIF":4.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365385","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}

引用次数: 0

Assessing the performance of novel and sustainable electrochemical sensor based on cobalt sulfide/upcycled reduced graphene oxide from plastic waste 评估基于硫化钴/从塑料废物中升级回收的还原性氧化石墨烯的新型可持续电化学传感器的性能

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-16 DOI: 10.1016/j.elecom.2025.107982

Arafat Toghan , N. Roushdy , Sami A. Al-Hussain , Mohamed S. Elnouby , Samah M. Yousef , A.A.M. Farag , M. Elsayed Youssef , Noha A. Elessawy

{"title":"Assessing the performance of novel and sustainable electrochemical sensor based on cobalt sulfide/upcycled reduced graphene oxide from plastic waste","authors":"Arafat Toghan , N. Roushdy , Sami A. Al-Hussain , Mohamed S. Elnouby , Samah M. Yousef , A.A.M. Farag , M. Elsayed Youssef , Noha A. Elessawy","doi":"10.1016/j.elecom.2025.107982","DOIUrl":"10.1016/j.elecom.2025.107982","url":null,"abstract":"<div><div>Developing electrochemical sensors that are both highly sensitive and environmentally sustainable is a pressing need in modern healthcare and environmental analysis. In this study, a cobalt sulfide/reduced graphene oxide (CoS/rGO) nanocomposite was synthesized via a straightforward, low-cost method that integrates thiourea and cobalt acetate to form CoS, with rGO derived from recycled plastic waste. The structural and electrochemical properties of the composites were systematically investigated using cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The addition of rGO, varied from 0 to 50 wt%, notably enhanced the electrical conductivity and surface activity of the sensing interface. Among the tested formulations, the composite containing 40 wt% rGO exhibited the highest performance, achieving a sensitivity of 12.4 μA mM<sup>−1</sup> cm<sup>−2</sup> and a detection limit of 0.2 μM, which is approximately 7.5 times lower than that of pristine CoS. Kinetic analysis confirmed that the sensing mechanism follows a pseudo-second-order model, indicative of a chemisorption-driven interaction between paracetamol molecules and the sensor surface. The sensor displayed excellent operational stability over 100 consecutive cycles and high repeatability with a relative standard deviation below 2.5 %. This work demonstrates a novel, green strategy for sensor fabrication that effectively combines electronic functionality with environmental sustainability, making the CoS/rGO nanocomposite a viable platform for next-generation sensing technologies.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107982"},"PeriodicalIF":4.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307042","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}

引用次数: 0

Exploration of the structural, optical, and dielectric performance of Mg-doped Sr2FeNbO6 double perovskite for wireless applications 无线应用中掺镁Sr2FeNbO6双钙钛矿结构、光学和介电性能的探索

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-11 DOI: 10.1016/j.elecom.2025.107981

Asif Ullah , Farman Ullah , Kamran Ullah , Fida Rehman , Aiyeshah Alhodaib , Salhah Hamed Alrefaee , Shaxnoza Saydaxmetova , Salah Knani , Vineet Tirth , Ali Algahtani , Abid Zaman

{"title":"Exploration of the structural, optical, and dielectric performance of Mg-doped Sr2FeNbO6 double perovskite for wireless applications","authors":"Asif Ullah , Farman Ullah , Kamran Ullah , Fida Rehman , Aiyeshah Alhodaib , Salhah Hamed Alrefaee , Shaxnoza Saydaxmetova , Salah Knani , Vineet Tirth , Ali Algahtani , Abid Zaman","doi":"10.1016/j.elecom.2025.107981","DOIUrl":"10.1016/j.elecom.2025.107981","url":null,"abstract":"<div><div>This study examined the effects of Mg doping on the structural, optical, photoluminescence, and dielectric properties of a series of double perovskite Sr<sub>2-x</sub>MgₓFeNbO₆ (0.00 ≤ x ≤ 0.40) ceramics that is successfully manufactured by using the mixed oxide route. It was proven by X-ray diffraction that a single-phase monoclinic perovskite (space group P21/c.) had formed, and at increasing Mg concentrations, SEM showed reduced porosity and increased grain uniformity. Tauc analysis and UV–Vis spectroscopy revealed a consistent decrease of the bandgap from 2.77 eV to 2.46 eV, which was ascribed to defect-induced electronic states and lattice distortion. The presence of levels of recombination-active defects was further confirmed by photoluminescence spectra. At high temperatures (∼560 °C), dielectric studies revealed a low loss (tanδ = 2.0) and a high dielectric constant (εᵣ ≈800), which made these materials attractive options for wireless communication components. Mg-doped Sr₂FeNbO₆ ceramics have the potential for advanced applications in microwave electronics and optoelectronics due to their superior dielectric behavior, bandgap tunability, and integrated structural stability.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107981"},"PeriodicalIF":4.7,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279851","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}

引用次数: 0

Measurement of equilibrium potential of Cl2/Cl− redox couple in molten chlorides 熔融氯化物中Cl2/Cl−氧化还原偶对平衡电位的测定

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-10 DOI: 10.1016/j.elecom.2025.107980

Zujian Tang , Qilin Yuan , Shangping Zhu , Osamu Takeda , Hongmin Zhu

引用次数: 0

Influence of lithium salt anions on the interfacial properties of PEO-based solid-state electrolytes 锂盐阴离子对peo基固态电解质界面性能的影响

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-06-09 DOI: 10.1016/j.elecom.2025.107979

Yi-Min Wei , An Qiu , Jingchao Wang , Yu Gu , Jian-Feng Li

{"title":"Influence of lithium salt anions on the interfacial properties of PEO-based solid-state electrolytes","authors":"Yi-Min Wei , An Qiu , Jingchao Wang , Yu Gu , Jian-Feng Li","doi":"10.1016/j.elecom.2025.107979","DOIUrl":"10.1016/j.elecom.2025.107979","url":null,"abstract":"<div><div>The use of poly(ethylene oxide) (PEO)-based solid-state electrolytes have shown potential to improve both the energy density and safety performance of lithium-metal batteries. However, these electrolytes often form unstable interfaces with lithium metal anodes, compromising the durability and sustained performance of solid-state lithium-metal batteries. In this study, three lithium salts, lithium (fluorosulfonyl) (trifluoromethanesulfonyl)imide (LiFTFSI), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), were each mixed in equimolar ratios with tetraethylene glycol dimethyl ether (G4) and introduced as a conductivity enhancer in PEO-based solid-state electrolytes. The effects of the lithium salt anions on the electrolyte properties were systematically investigated. Among the three, the fluorosulfonyl group was found to enhance ionic conductivity, while the trifluoromethanesulfonyl group improved thermal stability. Notably, the synergistic interaction between these two groups in LiFTFSI led to the formation of a stable solid-electrolyte interphase (SEI), characterized by a higher content of inorganic species and reduced organic components. As a result, LiFTFSI/G4-based solid-state electrolytes enabled stable cycling for 200 cycles at a 0.5C rate in LiFePO<sub>4</sub>-based solid-state lithium-metal batteries, achieving a capacity retention of 91 %. This study provides valuable insights into the optimization of high-efficiency solid-state lithium-metal batteries by elucidating the distinct roles of lithium salt anions.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"177 ","pages":"Article 107979"},"PeriodicalIF":4.7,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255150","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}

引用次数: 0