Electrochemistry Communications最新文献_第9页

Enhanced electrochemical performance of molten salt synthesized V2CTx MXene@VOx composite in Zn ion aqueous electrolytes 增强熔盐合成的 V2CTx MXene@VOx 复合材料在锌离子水溶液电解质中的电化学性能

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-06-06 DOI: 10.1016/j.elecom.2024.107770

Jinru Wen , Hongyan Dan , Chunyang Li , Chunlong Dai , Zifeng Lin

{"title":"Enhanced electrochemical performance of molten salt synthesized V2CTx MXene@VOx composite in Zn ion aqueous electrolytes","authors":"Jinru Wen , Hongyan Dan , Chunyang Li , Chunlong Dai , Zifeng Lin","doi":"10.1016/j.elecom.2024.107770","DOIUrl":"https://doi.org/10.1016/j.elecom.2024.107770","url":null,"abstract":"<div>The development of MXenes using Lewis acidic salts for etching (MS-MXenes) in molten salts presents a novel, fluorine-free method attracting considerable interest. However, the behavior of various MS-MXenes and their derivatives in aqueous environments remains largely unexplored. Particularly, vanadium-based MXenes demonstrate intriguing properties in Zn ion aqueous electrolytes. Herein, a fluorine-free V2CTx MXene@VOx is synthesized by molten salt etching under an argon atmosphere. The electrochemical properties of V2CTx@VOx are tested in various aqueous electrolytes, including Zn(TFSI)2, ZnSO4, ZnBr2, ZnAc2, and ZnCl2 solutions. The V2CTx@VOx shows high redox capacities in all these Zn ion electrolytes, with the peak performance observed in 1 M ZnBr2, achieving a maximum capacity of 172 mAh g−1 at 1 mV s−1. This performance rivals that of V2CTx MXene prepared through wet-chemical methods. These results underscore the potential of MS-MXenes materials in aqueous energy storage applications.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107770"},"PeriodicalIF":5.4,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124001139/pdfft?md5=8418b9949c6e729a73e55f7e4704d15c&pid=1-s2.0-S1388248124001139-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141294560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic effects of co-doping WO3 with Al and Pt on photoelectrochromic performance WO3 与 Al 和 Pt 的共掺杂对光电变色性能的协同效应

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-28 DOI: 10.1016/j.elecom.2024.107762

Jacinta Akoth Okwako , Seung Han Song , Sunghyoek Park , Hung Van Tran , Bernard O. Aduda , Sebastian Waita , Young-Sik Hong , Sungjun Hong , Chi-Hwan Han

{"title":"Synergistic effects of co-doping WO3 with Al and Pt on photoelectrochromic performance","authors":"Jacinta Akoth Okwako , Seung Han Song , Sunghyoek Park , Hung Van Tran , Bernard O. Aduda , Sebastian Waita , Young-Sik Hong , Sungjun Hong , Chi-Hwan Han","doi":"10.1016/j.elecom.2024.107762","DOIUrl":"https://doi.org/10.1016/j.elecom.2024.107762","url":null,"abstract":"<div>In this work, we conduct a detailed study to understand the photoelectrochromic properties of Al-Pt co-doped tungsten oxide (WO3). Similarly, we support the photoelectrochromic findings with material characterization, providing additional understanding of the photoelectrochromic performance exhibited by the prepared samples. Additionally, we discuss the effects of Al and Pt doping on photoelectrochromic performance in detail, with a focus on X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) combined with EDS, X-ray photoelectron spectroscopy (XPS), and optical transmittance. XRD peaks confirm the presence of hexagonally-structured WO3 in the prepared samples with a polycrystalline nature, and a similar observation is confirmed via TEM analysis. Surface characterizations conducted through SEM and EDS analyses unveil the morphologies and particle sizes. Optical studies show a bandgap of 1.88 eV and 1.95 eV for Al doped and Al-Pt co-doped WO3, indicating bandgap shrinkage in comparison to the optical bandgap of WO3 of 2.36 eV. The Al-Pt co-doping results in a significant enhancement in photoelectrochromic performance, attaining an optical modulation of 43.61 % at 550 nm and consequently 85 % of the initial transmittance recovered after 2 h of bleaching in the dark. This is an improvement in comparison to the Al doped sample which attains a coloration depth of 43.15 % at 550 nm with only 75 % of the original transmittance being recovered after 2 h under dark conditions.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107762"},"PeriodicalIF":5.4,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S138824812400105X/pdfft?md5=2e7905af1837f97b5745fdce157eac03&pid=1-s2.0-S138824812400105X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141243793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Highlighting the operating regimes of microchannel electrodes under laminar flow: Mapping of photoluminescence and electrochemiluminescence through semi-transparent electrodes 突显层流条件下微通道电极的工作状态：通过半透明电极绘制光致发光和电致化学发光图

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-24 DOI: 10.1016/j.elecom.2024.107759

Yumeng Ma, Catherine Sella, Thomas Delahaye, Laurent Thouin

{"title":"Highlighting the operating regimes of microchannel electrodes under laminar flow: Mapping of photoluminescence and electrochemiluminescence through semi-transparent electrodes","authors":"Yumeng Ma, Catherine Sella, Thomas Delahaye, Laurent Thouin","doi":"10.1016/j.elecom.2024.107759","DOIUrl":"10.1016/j.elecom.2024.107759","url":null,"abstract":"<div>Semi-transparent platinum electrodes were designed and optimized to implement photoluminescence (PL) and electrochemiluminescence (ECL) in microchannels under flow conditions. The luminescence properties of tris(2,2′-bipyridyl)ruthenium(II) (Ru(bpy)32+) were used to map steady-state emitted light through semi-transparent microchannel electrodes. Several diffusive-convective regimes were thus imposed in order to experimentally highlight the operating conditions of the electrodes, in particular the active zones at their upstream edges contributing to the Faradaic current. PL and ECL profiles were established on the electrode surfaces as a function of flow rate. The PL profiles confirmed the control of the process by mass transport. The data were validated by numerical simulations within the limits of experimental accuracy. ECL emission in presence of the co-reactant tri-n-propylamine (TPA) was also limited by mass transport. However, in comparison the characteristics of the ECL profiles demonstrated the complexity of the underlying mechanism involving Ru(bpy)32+ regeneration and TPA consumption.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107759"},"PeriodicalIF":5.4,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124001024/pdfft?md5=fe59ae4422c8ca7bd994f85f31fe77ba&pid=1-s2.0-S1388248124001024-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141135202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ion-selective paper-based chromogenic strip and electrochemical sensor for the detection of ammonium ions 用于检测铵离子的离子选择性纸基显色带和电化学传感器

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-23 DOI: 10.1016/j.elecom.2024.107757

Pawankumar Rai , Ashish K. Singh , Srishti Mehrotra , Sandeep K. Sharma

{"title":"Ion-selective paper-based chromogenic strip and electrochemical sensor for the detection of ammonium ions","authors":"Pawankumar Rai , Ashish K. Singh , Srishti Mehrotra , Sandeep K. Sharma","doi":"10.1016/j.elecom.2024.107757","DOIUrl":"10.1016/j.elecom.2024.107757","url":null,"abstract":"<div>The fraudulent practice of adding ammonium salts to milk in order to enhance the nitrogen content has serious health implications including renal failure. Ammonium ion detection has been targeted through the conventional analytical methods however, lack of portability and complex operation limits their use for field applications. In this scenario, paper-based test strips and electrochemical sensors can provide strategies for point-of-test applications. Here, an ion-selective paper-based chromogenic strip and an electrochemical sensor has been developed for detection and quantification of ammonium ions. The developed paper-based chromogenic strip showed detection limit of 0.008 % (w/v) for ammonium ions, whereas, electrochemical sensor showed an LOD of 0.0062 ± 0.0023 % (w/v) with a sensitivity of 1.6 × 10−5 A.% −1.mm−2. The developed paper-based chromogenic strip and electrochemical sensor can be employed by regulatory bodies and dairy industries to ensure the safety and quality of milk.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107757"},"PeriodicalIF":5.4,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124001000/pdfft?md5=7a9c82b18daa08728153ce9665a2fb3d&pid=1-s2.0-S1388248124001000-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141144711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relationship between particle shape and fast-charging capability of a dry-processed graphite electrode in lithium-ion batteries 锂离子电池中干法加工石墨电极的颗粒形状与快速充电能力之间的关系

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-21 DOI: 10.1016/j.elecom.2024.107761

Jun Ho Hwang , Hyundong Yoo , Seungeun Oh , Hansu Kim

{"title":"Relationship between particle shape and fast-charging capability of a dry-processed graphite electrode in lithium-ion batteries","authors":"Jun Ho Hwang , Hyundong Yoo , Seungeun Oh , Hansu Kim","doi":"10.1016/j.elecom.2024.107761","DOIUrl":"https://doi.org/10.1016/j.elecom.2024.107761","url":null,"abstract":"<div>Improving lithium-ion transport in electrodes by controlling electrode microstructure is a promising option for enhancing the fast-charging capability of graphite anodes in lithium-ion batteries. Dry processing of electrodes based on a polytetrafluoroethylene binder has attracted considerable attention as an alternative to solvent-based wet processing. The morphology of graphite particles has a significant impact on electrode microstructure, but few reports have been published on dry-processed graphite anodes. In this work, we found that the morphology of graphite particles is a key factor to determine the fast-charging capability of the dry-processed graphite electrode as well as the microstructure of the dry-processed graphite electrode. X-ray microscopy combined with mercury porosimetry and symmetrical cell electrochemical impedance spectroscopy reveal that the difference in porosity between the top and bottom layers of a dry electrode with spherical graphite particles is greater than that of flake-shaped graphite particles, resulting in enhanced lithium-ion transport in the electrode and improved fast-charging capability at a high charging rate of 5C (17.5 mA cm−2). These findings supply insights into the effective design of dry-processed graphite anodes with an emphasis on fast-charging capability as well as the development of graphite anode materials for dry-processing based lithium-ion batteries.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107761"},"PeriodicalIF":5.4,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124001048/pdfft?md5=b61eeb2b93d84e5dde6463f6ca66baaa&pid=1-s2.0-S1388248124001048-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141083477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rechargeable zinc-air battery with bifunctional electrocatalyst of copper oxide and graphene nanoplatelets 使用氧化铜和石墨烯纳米片双功能电催化剂的可充电锌-空气电池

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-20 DOI: 10.1016/j.elecom.2024.107760

Barbara A.C. Sá , Tatiana S. Andrade , Rafael R. de Souza , Antero R. Santos Neto , Mariandry Rodriguez , Francisco G.E. Nogueira , Márcio C. Pereira

{"title":"Rechargeable zinc-air battery with bifunctional electrocatalyst of copper oxide and graphene nanoplatelets","authors":"Barbara A.C. Sá , Tatiana S. Andrade , Rafael R. de Souza , Antero R. Santos Neto , Mariandry Rodriguez , Francisco G.E. Nogueira , Márcio C. Pereira","doi":"10.1016/j.elecom.2024.107760","DOIUrl":"https://doi.org/10.1016/j.elecom.2024.107760","url":null,"abstract":"<div>Rechargeable zinc-air batteries have been identified as promising technologies for energy storage. However, developing cost-effective electrocatalysts that can efficiently facilitate the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is crucial for their advancement. This work investigates synthesized electrocatalysts composed of graphene-Cu2O deposited on carbon cloth by doctor blading casting method as bifunctional electrodes in a rechargeable Zn-air battery. The battery integrated with graphene-Cu2O as the air-cathode electrocatalyst showed superior performance in terms of cycling stability compared to that without Cu2O. This enhanced performance is attributed to the reversibility of Cu+/Cu2+ species during the redox reactions facilitated by the high electrical conductivity of graphene. Therefore, the results suggest the potential of the synthesized electrodes for advancing the development of rechargeable Zn-air batteries.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107760"},"PeriodicalIF":5.4,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124001036/pdfft?md5=61e8557db164f99c73a3cae11c30d538&pid=1-s2.0-S1388248124001036-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141078670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of an efficient electrochemical sensor based on CuAl-LDH using an electrostatic repulsion approach for the selective determination of dopamine in the presence of uric acid and ascorbic acid species 利用静电排斥方法开发基于 CuAl-LDH 的高效电化学传感器，用于在尿酸和抗坏血酸存在时选择性测定多巴胺

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-19 DOI: 10.1016/j.elecom.2024.107756

Saeedeh Shahparast , Karim Asadpour-Zeynali

{"title":"Development of an efficient electrochemical sensor based on CuAl-LDH using an electrostatic repulsion approach for the selective determination of dopamine in the presence of uric acid and ascorbic acid species","authors":"Saeedeh Shahparast , Karim Asadpour-Zeynali","doi":"10.1016/j.elecom.2024.107756","DOIUrl":"https://doi.org/10.1016/j.elecom.2024.107756","url":null,"abstract":"<div>This study provides a unique electrochemical sensor that exhibits both excellent sensitivity and selectivity, while also being environmentally friendly. The CuAl-LDH/GCE sensor, proposed as the recommended sensor, was synthesized using a straightforward one-step co-precipitation procedure. It was first used to measure dopamine levels using differential pulse voltammetry. At the ideal pH level of 8, dopamine has a positive charge, but ascorbic acid and uric acid have a negative charge. LDH, on the other hand, carries a negative charge and exhibits high electrostatic attraction towards dopamine, but is electrostatically repelled by negatively charged ascorbic acid and uric acid. Hence, CuAl-LDH/GCE has the potential to specifically ascertain the existence of dopamine in the presence of these particular species. The examination of the composition and morphology of CuAl-LDH was conducted using various analytical techniques, including scanner electron microscopy (FESEM), transmission electron microscope (TEM), element mapping (MAP), Fourier transform infrared (FTIR), energy-dispersive X-ray spectroscopy (EDX), Brunauer Emmett Teller (BET), X-ray photoelectron diffraction (XRD), and Raman techniques. Under ideal circumstances, the calibration graph of dopamine was generated using differential pulse voltammetry. A linear range of 4.194–1151.54 μM was achieved for dopamine, with a limit of detection of 0.33 μM. The findings of the study indicate that the sensor created for dopamine determination has exceptional stability, repeatability, and reproducibility. The sensor that was presented was effectively used for the measurement of dopamine in both pharmaceutical ampoules and human plasma samples.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107756"},"PeriodicalIF":5.4,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124000997/pdfft?md5=0dde069cfe05094c61dc0dee01e29700&pid=1-s2.0-S1388248124000997-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141090617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Age- and sex-dependent electrochemistry of Ginkgo biloba leaves 银杏叶电化学的年龄和性别依赖性

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-17 DOI: 10.1016/j.elecom.2024.107758

Antonio Doménech-Carbó , Josefa Prieto-Mossi , Noemí Montoya

引用次数: 0

Isotropic cell design enables low-pressure lithium metal solid-state batteries 各向同性电池设计实现了低压锂金属固态电池

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-13 DOI: 10.1016/j.elecom.2024.107753

William Fitzhugh , Luhan Ye , Xin Li

引用次数: 0

A novel method for improving the electrochemical properties by modifying conductive polymer on 3D printed nanocarbon electrode 通过改性三维打印纳米碳电极上的导电聚合物改善电化学性能的新方法

IF 5.4 3区工程技术

Electrochemistry Communications Pub Date : 2024-05-13 DOI: 10.1016/j.elecom.2024.107754

Meifang Liao , Yaxin Yang , Jing Ou , Honglin Yang , Xuemei Dai , Lian Zhong , Jie Wen , Yanyu Jiang , Lujun Wang

{"title":"A novel method for improving the electrochemical properties by modifying conductive polymer on 3D printed nanocarbon electrode","authors":"Meifang Liao , Yaxin Yang , Jing Ou , Honglin Yang , Xuemei Dai , Lian Zhong , Jie Wen , Yanyu Jiang , Lujun Wang","doi":"10.1016/j.elecom.2024.107754","DOIUrl":"https://doi.org/10.1016/j.elecom.2024.107754","url":null,"abstract":"<div>The technology of 3D printing has emerged as a potent tool for the preparation of 3D-printed electrode. Using commercial graphene/polylactic acid (PLA) composite filaments as printed materials, fused deposition modeling as 3D-printed technique, 3D printed electrodes (3DEs) were created in this work. Gold nanoparticles (AuNPs) and the composites of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) were used to modify the activated 3DEs for constructing a novel electrode (SACP@Au@3DE), and in this work chlorogenic acid (CGA) was regarded as a probe for testing the performance of SACP@Au@3DE. The surface physicochemical properties of the prepared 3DEs were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The electrochemical properties of the prepared 3DEs were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) methods. The constructed SACP@Au@3DE can be used to determine CGA at concentrations ranging from 10 to 400 μM with a limit of detection (LOD) of 4.13 μM. Ultimately, the SACP@Au@3DE sensor was used for CGA detection in coffee powder sample to explore the potential for real sample analysis. This work opens the novel avenue of using conductive polymer modified 3D-printed electrode in the field of sensor.</div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"165 ","pages":"Article 107754"},"PeriodicalIF":5.4,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124000973/pdfft?md5=98bedb23e90980176b5688ad3d1135a7&pid=1-s2.0-S1388248124000973-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140952452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0