Journal of electrochemical science and technology最新文献_第5页

Simple and Sensitive Electrochemical Sandwich-type Immunosensing of Human Chorionic Gonadotropin based on b-cyclodextrin Functionalized Graphene 基于b-环糊精功能化石墨烯的人绒毛膜促性腺激素简单灵敏的电化学三明治免疫传感

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-11-23 DOI: 10.33961/jecst.2022.00556

Lin‐Fen Xu, Ling Liu, Xiaoyan Zhao, Jinyu Lin, Shaohan Xu, Jinlian He, Debin Jiang, Yong Xia

引用次数: 0

Design and Analysis of Spider Bionic Flow Field for Proton Exchange Membrane Fuel Cell 质子交换膜燃料电池蜘蛛仿生流场设计与分析

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-11-23 DOI: 10.33961/jecst.2022.00479

Jian Yao, Fa-yi Yan, Xu Pei

引用次数: 2

Electroanalytical Determination of Copper(II) Ions Using a Polymer Membrane Sensor 聚合物膜传感器电分析测定铜(II)离子

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-11-23 DOI: 10.33961/jecst.2022.00661

Oguz Özbek, M. Gürdere, Caglar Berkel, Ö. Isildak

{"title":"Electroanalytical Determination of Copper(II) Ions Using a Polymer Membrane Sensor","authors":"Oguz Özbek, M. Gürdere, Caglar Berkel, Ö. Isildak","doi":"10.33961/jecst.2022.00661","DOIUrl":"https://doi.org/10.33961/jecst.2022.00661","url":null,"abstract":"In this study, a new potentiometric sensor selective to copper(II) ions was developed and characterized. The developed sensor has a polymeric membrane and contains 4.0% electroactive material (ionophore), 33.0% poly(vinyl chloride) (PVC), 63.0% bis(2–ethylhexyl)sebacate (BEHS) and 1.0% potassium tetrakis( p –chlorophenyl)borate (KT p ClPB). This novel cop-per(II)–selective sensor exhibits a Nernstian response over a wide concentration range from 1.0×10 -6 to 1.0×10 -1 mol L -1 with a slope of 29.6 (±1.2) mV decade -1 , and a lower detection limit of 8.75×10 -7 mol L -1 . The sensor, which was pro-duced economically by synthesizing the ionophore in the laboratory, has a good selectivity and repeatability, fast response time and stable potentiometric behaviour. The potential response of the sensor remains unaffected of pH in the range of 5.0–10.0. Based on the analytical applications of the sensor, we showed that it can be used as an indicator electrode in the quantification of Cu 2+ ions by potentiometric titration against EDTA, and can also be successfully utilized for the determination of copper(II) ions in different real samples.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41824734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3

Effect of Edge-Chemistry on Graphene-Based Hybrid Electrode Materials for Energy Storage Device 边缘化学对储能装置用石墨烯基混合电极材料的影响

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-11-21 DOI: 10.33961/jecst.2022.00619

Hyo-Young Kim, Ji-Woo Park, Seo Jeong Yoon, In‐Yup Jeon, Young-Wan Ju

{"title":"Effect of Edge-Chemistry on Graphene-Based Hybrid Electrode Materials for Energy Storage Device","authors":"Hyo-Young Kim, Ji-Woo Park, Seo Jeong Yoon, In‐Yup Jeon, Young-Wan Ju","doi":"10.33961/jecst.2022.00619","DOIUrl":"https://doi.org/10.33961/jecst.2022.00619","url":null,"abstract":"Owing to the rapid climate change, a high-performance energy storage system (ESS) for efficient energy consumption has been receiving considerable attention. ESS, such as capacitors, usually has issues with the ion diffusion of electrode materials, resulting in a decrease in their capacitance. Notably, appropriate pore diameter and large specific surface area (SSA) may result in an effective ion diffusion. Therefore, graphene and multi-walled carbon nanotube (graphene@MWCNT) hybrid nanomaterials, with covalent bonds between the graphene and MWCNT, were prepared via an edge-chemistry reaction. The properties of these materials, such as high porosity, large SSA, and high electroconductivity, make them suitable to be used as electrode materials for capacitors. The optimal ratio of graphene to MWCNT can affect the electrochemical performance of the electrode material based on its physical and electrochemical properties. The supercapacitor using optimal graphene-based hybrid electrode material exhibited highest specific capacitance value as 158 F/g and excellent cycle stability.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48307363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The Ways for Bi on Pt to Enhance Formic Acid Oxidation 铋在铂上促进甲酸氧化的途径

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-10-12 DOI: 10.33961/jecst.2022.00514

Hyein Lee, Young Jun Kim, Young-Dong Sohn, C. Rhee

{"title":"The Ways for Bi on Pt to Enhance Formic Acid Oxidation","authors":"Hyein Lee, Young Jun Kim, Young-Dong Sohn, C. Rhee","doi":"10.33961/jecst.2022.00514","DOIUrl":"https://doi.org/10.33961/jecst.2022.00514","url":null,"abstract":"This work presents a correlation between the behavior of formic acid oxidation (FAO) on various Bi-modified Pt(poly) disk electrodes and their morphologies observed on Bi-modified Pt(111) disk electrodes using electrochemical scanning tunneling microscopy (EC-STM) to understand the effects of Bi on Pt. To distinguish the FAO activities of Bi on Pt and plain Pt around Bi, additional Pt was intentionally deposited using two different routes: direct route and iodine route. In direct route, Pt was directly deposited on Bi islands and plain Pt sites around Bi islands, while in iodine route, Pt was exclusively deposited on Bi islands by protecting plain Pt sites with adsorbed iodine. Thus, a comparison of FAO performances on the two Bi-modified Pt electrodes with additional Pt (deposited in the different ways) disclosed a difference in FAO performances on plain Pt sites and Bi islands. When Bi coverage was ~0.04, the Bi deposits were scattered Bi islands enhancing FAO on Pt(poly). The additional Pt deposits using direct route increased FAO efficiency, while the ones using iodine route slightly decreased FAO current. The EC-STM observations indicated that Pt deposits around Bi islands, not on Bi islands, were responsible for the FAO current increase on Bi-modified Pt(poly). The FAO efficiency on Bi-modified Pt(poly) with a Bi coverage of ~0.25 increased by a factor of 2. However, the additional Pt deposits using the two Pt deposition routes notably decreased the FAO current. The dependency of FAO on Bi coverage was discussed in terms of electronic effect and ensemble effect.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41634521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Synthesis of Silver Nanoparticles using Pulse Electrolysis in 1-n-butyl-3-methylimidazolium Chloride Ionic Liquid 1-正丁基-3-甲基氯化咪唑离子液体中脉冲电解合成银纳米粒子

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-10-12 DOI: 10.33961/jecst.2022.00570

J. Jang, Jihee Kim, Churl-Kyoung Lee, K. Kwon

{"title":"Synthesis of Silver Nanoparticles using Pulse Electrolysis in 1-n-butyl-3-methylimidazolium Chloride Ionic Liquid","authors":"J. Jang, Jihee Kim, Churl-Kyoung Lee, K. Kwon","doi":"10.33961/jecst.2022.00570","DOIUrl":"https://doi.org/10.33961/jecst.2022.00570","url":null,"abstract":"Ionic liquids are considered as a promising, alternative solvent for the electrochemical synthesis of metals because of their high thermal and chemical stability, relatively high ionic conductivity, and wide electrochemical window. In particular, their wide electrochemical window enables the electrodeposition of metals without any side reaction of electrolytes such as hydrogen evolution. The electrodeposition of silver is conducted in 1-n-butyl-3-methylimidazolium chloride ([C4mim]Cl) ionic liquid system with a silver source of AgCl. This study is the first attempt to electrodeposit silver nanoparticles without using co-solvents other than [C4mim]Cl. Pulse electrolysis is employed for the synthesis of silver nanoparticles by varying applied potentials from -3.0 V to -4.5 V ( vs. Pt-quasi reference electrode) and pulse duration from 0.1 s to 0.7 s. Accord-ingly, the silver nanoparticles whose size ranges from 15 nm to ~100 nm are obtained. The successful preparation of silver nanoparticles is demonstrated regardless of the kinds of substrate including aluminum, stainless steel, and carbon paper in the pulse electrolysis. Finally, the antimicrobial property of electrodeposited silver nanoparticles is confirmed by an antimicrobial test using Staphylococcus aureus.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42085675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Oxygen Evolution Reaction on NixFe3-xO4 (0 ≤ x ≤ 1.0) in Alkaline Medium at 25ºC NixFe3-xO4（0≤x≤1.0）在25℃碱性介质中的电化学析氧反应

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-09-29 DOI: 10.33961/jecst.2022.00395

Pankaj Chauhan, B. Lal

{"title":"Electrochemical Oxygen Evolution Reaction on NixFe3-xO4 (0 ≤ x ≤ 1.0) in Alkaline Medium at 25ºC","authors":"Pankaj Chauhan, B. Lal","doi":"10.33961/jecst.2022.00395","DOIUrl":"https://doi.org/10.33961/jecst.2022.00395","url":null,"abstract":"Spinel ferrites (Ni x Fe 3-x O 4 ; x = 0.25, 0.5, 0.75 and 1.0) have been prepared at 550ºC by egg white auto-combustion route using egg white at 550ºC and characterized by physicochemical (TGA, IR, XRD, and SEM) and electrochemical (CV and Tafel polarization) techniques. The presence of characteristic vibration peaks in FT-IR and reflection planes in XRD spectra confirmed the formation of spinel ferrites. The prepared oxides were transformed into oxide film on glassy carbon electrodes by coating oxide powder ink using the nafion solution and investigated their electrocatalytic performance for OER in an alkaline solution. The cyclic voltammograms of the oxide electrode did not show any redox peaks in oxygen overpotential regions. The iR-free Tafel polarization curves exhibited two Tafel slopes (b 1 = 59–90 mV decade -1 and b 2 = 92– 124 mV decade -1 ) in lower and higher over potential regions, respectively. Ni-substitution in oxide matrix significantly improved the electrocatalytic activity for oxygen evolution reaction. Based on the current density for OER, the 0.75 mol Ni-substituted oxide electrode was found to be the most active electrode among the prepared oxides and showed the highest value of apparent current density (~9 mA cm -2 at 0.85 V) and lowest Tafel slope (59 mV decade -1 ). The OER on oxide electrodes occurred via the formation of chemisorbed intermediate on the active sites of the oxide electrode and follow the sec-ond-order mechanism.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48655226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Compatibility of Lithium ion Phosphate Battery in Solar off Grid Application 磷酸锂电池在太阳能离网应用中的兼容性

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-09-14 DOI: 10.33961/jecst.2022.00423

L. Sathishkumar, Vetrivel Dhanapal, S. Ravi, R. Saratha, N. Sugumaran

{"title":"Compatibility of Lithium ion Phosphate Battery in Solar off Grid Application","authors":"L. Sathishkumar, Vetrivel Dhanapal, S. Ravi, R. Saratha, N. Sugumaran","doi":"10.33961/jecst.2022.00423","DOIUrl":"https://doi.org/10.33961/jecst.2022.00423","url":null,"abstract":"Solar energy harvesting is practiced by various nations for the purpose of energy security and environment preservation in order to reduce overdependence on oil. Converting solar energy into electrical energy through Photovoltaic (PV) module can take place either in on-grid or off-grid applications. In recent time Lithium battery is exhibiting its presence in on-grid applications but its role in off-grid application is rarely discussed in the literature. The preliminary capacity and Peukert’s study indicated that the battery quality is good and can be subjected for life cycle test. The capacity of the battery was 10.82 Ah at 1 A discharge current and the slope of 1.0117 in the Peukert’s study indicated the reaction is very fast and inde-pendent on rate of discharge. In this study Lithium Iron Phosphate battery (LFP) after initial characterization was subjected to life cycle test which is specific to solar off-grid application as defined in IEC standard. The battery has delivered just 6 endurance units at room temperature before its capacity reached 75% of rated value. The low life of LFP battery in off-grid application is discussed based on State of Charge (SOC) operating window. The battery was operated both in high and low SOC’s in off-grid application and both are detrimental to life of lithium battery. High SOC operation resulted in cell-to-cell variation and low SOC operation resulted in lithium plating on negative electrode. It is suggested that to make it more suitable for off-grid applications the battery by default has to be overdesigned by nearly 40% of its rated capacity.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46247645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Highly Active Electrocatalyst based on Ultra-low Loading of Ruthenium Supported on Titanium Carbide for Alkaline Hydrogen Evolution Reaction 碳化钛负载钌超低负荷高活性碱性析氢电催化剂

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-09-14 DOI: 10.33961/jecst.2022.00178

Jung-Hyeun Kim, Sang‐Mun Jung, Kyu-Su Kim, Sang-Hoon You, Byung-Jo Lee, Yong‐Tae Kim

引用次数: 1

Rate Capability of LiFePO4 Cathodes and the Shape Engineering of Their Anisotropic Crystallites LiFePO4阴极的速率性能及其各向异性晶体的形状工程

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2022-08-23 DOI: 10.33961/jecst.2022.00248

A. Bobyl, Sangsoo Nam, J. Song, Alexander Ivanishchev, A. Ushakov

{"title":"Rate Capability of LiFePO4 Cathodes and the Shape Engineering of Their Anisotropic Crystallites","authors":"A. Bobyl, Sangsoo Nam, J. Song, Alexander Ivanishchev, A. Ushakov","doi":"10.33961/jecst.2022.00248","DOIUrl":"https://doi.org/10.33961/jecst.2022.00248","url":null,"abstract":"For cuboid and ellipsoid crystallites of LiFePO 4 powders, by X-ray diffraction (XRD) and microscopic (TEM) studies, it is possible to determine the anisotropic parameters of the crystallite size distribution functions. These parameters were used to describe the cathode rate capability within the model of averaging the diffusion coefficient D over the length of the crystallite columns along the [010] direction. A LiFePO 4 powder was chosen for testing the developed model, consisting of big cuboid and small ellipsoid crystallites (close to them). When analyzing the parts of big and small rate сapabilities, the fitting values D = 2.1 and 0.3 nm 2 /s were obtained for cuboids and ellipsoids, respectively. When analyzing the results of cyclic voltammetry using the Randles-Sevcik equation and the total area of projections of electrode crystallites on their (010) plane, slightly different values were obtained, D = 0.9 ± 0.15 and 0.5 ± 0.15 nm 2 /s, respectively. We believe that these inconsistencies can be considered quite acceptable, since both methods of determining D have obvious sources of error. However, the developed method has a clearly lower systematic error due to the ability to actually take into account the shape and statistics of crystallites, and it is also useful for improving the accuracy of the Randles-Sevcik equation. It has also been demonstrated that the shape engineering of crystallites, among other tasks, can increase the cathode capacity by 15% by increasing their size correlation coefficients.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42480547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3