Russian Journal of Electrochemistry最新文献_第6页

Ascorbic Acid Sensor Using Modified Pencil Graphite Electrodes: A Preliminary Study 使用改性铅笔石墨电极的抗坏血酸传感器：初步研究

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-21 DOI: 10.1134/S1023193524050094

S. F. F. S. Yaacob, S. N. M. Din, F. B. M. Suah

{"title":"Ascorbic Acid Sensor Using Modified Pencil Graphite Electrodes: A Preliminary Study","authors":"S. F. F. S. Yaacob, S. N. M. Din, F. B. M. Suah","doi":"10.1134/S1023193524050094","DOIUrl":"10.1134/S1023193524050094","url":null,"abstract":"This study aimed to develop an electrochemical sensor based on a derivative of graphene oxide (GO) and a molecularly imprinted polymer (MIP) on a pencil graphite electrode (PGE) for the detection of ascorbic acid (AA). MIP was fabricated onto the surface of the electrode by electropolymerization technique using cyclic voltammetry with a scan rate of 10 mV/s consisting of template molecule (ascorbic acid), functional monomer (polypyrrole), cross-linker (LiClO4) and citrate buffer at pH 4. Then, the template removal process was conducted to create the imprinted cavities for detecting the analyte. Differential pulse voltammetry (DPV) and cyclic voltammetry (CV) methods were used to perform quantitative analyses of the modified electrodes. CV analysis was performed at the optimum scan rate of 10 mV/s, and the electrolyte concentration at 1.0 mM K3[Fe(CN)6] in 0.1 M KCl. MIP-PGE (2) produced the best performance by having the highest redox peak current response when scanning with the CV compared to other modified electrodes. The optimum parameters for DPV measurement are 100 mV pulse amplitude, 200 ms pulse period, and 10 mV/s scan rate. The straightforward instrumentation and easy preparation of the proposed sensor make it a valuable system for constructing simple devices for determining ascorbic acid.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 5","pages":"392 - 399"},"PeriodicalIF":1.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141130212","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}

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The Changes in the Conductance of Bilayer Lipid Membranes Caused by Pluronics L61 and F68: Similarities and Differences 多元醇 L61 和 F68 引起的双层脂膜传导性变化：异同

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-21 DOI: 10.1134/S1023193524050057

A. A. Anosov, E. D. Borisova, O. O. Konstantinov, E. Yu. Smirnova, E. A. Korepanova, V. A. Kazamanov, A. S. Derunets

{"title":"The Changes in the Conductance of Bilayer Lipid Membranes Caused by Pluronics L61 and F68: Similarities and Differences","authors":"A. A. Anosov, E. D. Borisova, O. O. Konstantinov, E. Yu. Smirnova, E. A. Korepanova, V. A. Kazamanov, A. S. Derunets","doi":"10.1134/S1023193524050057","DOIUrl":"10.1134/S1023193524050057","url":null,"abstract":"The effect of pluronics L61 and F68 containing hydrophobic poly(propylene oxide) blocks of the same length and hydrophilic poly(ethylene oxide) blocks of different lengths on the conductance of planar bilayer lipid membranes made of azolectine is investigated. The conductance of these membranes increases as the concentration of both pluronics increases. For the same concentration of pluronics in solution, the conductance is higher for L61. Based on the literature data, the concentration of pluronics bound with the bilayer is calculated. For the close concentration of membrane-bound pluronics, the conductance of membranes is also close. It is concluded that in the first approximation, the appearance of the same hydrophobic parts of pluronics L61 and F68 in a membrane is accompanied by the same increase in its conductance. The conductance vs. concentration curves are superlinear for L61 and sublinear for F68. In the presence of either of these pluronics, the conduction spikes with the amplitude from 10 to 300 pSm and higher are observed for approximately 40% of membranes. These surges of conductance are associated with the appearance of conductive pores or defects in the membrane. The number of pores observed in the membrane is a random variable with a large scatter and does not correlate with the pluronic concentration. The difference between the average pore conductivities for membranes containing L61 and F68 is statistically insignificant.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 5","pages":"339 - 347"},"PeriodicalIF":1.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141136031","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}

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Analysis of the Electrochemical Impedance Spectra and the Structure of the Solid Electrolyte Interphase at the Electrodeposited Metallic Lithium Using the Distribution of Relaxation Times Method 利用弛豫时间分布法分析电沉积金属锂的电化学阻抗谱和固体电解质间相的结构

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-21 DOI: 10.1134/S1023193524050033

S. S. Alpatov, F. A. Vasiliev, V. Kh. Aleshina, T. A. Vagramyan, O. A. Semenikhin

{"title":"Analysis of the Electrochemical Impedance Spectra and the Structure of the Solid Electrolyte Interphase at the Electrodeposited Metallic Lithium Using the Distribution of Relaxation Times Method","authors":"S. S. Alpatov, F. A. Vasiliev, V. Kh. Aleshina, T. A. Vagramyan, O. A. Semenikhin","doi":"10.1134/S1023193524050033","DOIUrl":"10.1134/S1023193524050033","url":null,"abstract":"The goal of this work is to confirm our earlier conclusion that the regularities observed during the electrodeposition of metallic lithium on copper and lithium electrodes can be associated with differences in the properties of the so-called solid electrolyte interphase formed at these electrodes in contact with the electrolyte. To do this, we analyzed the electrochemical impedance spectra measured during the above processes by using the method of the distribution of relaxation times. The electrolyte addition with surfactants (the cetyltrimethylammonium bromide and hexadecylpyridinium bromide) was shown to lead to a significant change in the properties of the solid electrolyte interphase layers and a noticeable increase in the values of the impedance components associated with the Faradaic processes at these electrodes. This indicates an inhibition of the lithium electrodeposition processes and the related process of dendrite formation under these conditions. At the same time, no such impedance components were observed at the fresh-formed deposit, which confirms our earlier conclusion that the effects of surfactants on the dendrite formation are associated with the changes in the properties of the solid electrolyte interphase layers in the presence of the surfactants, rather than the surfactants’ adsorption at lithium and blocking of the dendrite growth.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 5","pages":"365 - 375"},"PeriodicalIF":1.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141142675","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}

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Processes at Platinum Electrodes during the Cathode Polarization in Alcohol Erbium Nitrate Solution 铂电极在硝酸铒酒精溶液中阴极极化的过程

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-21 DOI: 10.1134/S1023193524050070

S. A. Volchek, V. A. Yakovtseva

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Lithium Electrodeposition in the Presence of Surfactants 表面活性剂作用下的锂电沉积

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-21 DOI: 10.1134/S1023193524050021

S. S. Alpatov, F. A. Vasiliev, V. Kh. Aleshina, T. A. Vagramyan, O. A. Semenikhin

{"title":"Lithium Electrodeposition in the Presence of Surfactants","authors":"S. S. Alpatov, F. A. Vasiliev, V. Kh. Aleshina, T. A. Vagramyan, O. A. Semenikhin","doi":"10.1134/S1023193524050021","DOIUrl":"10.1134/S1023193524050021","url":null,"abstract":"The aim of this work is to study the possibility of suppressing the metallic lithium dendrite formation during the operation of lithium secondary batteries, including those with a metallic lithium anode. The electrochemical deposition of lithium on copper and lithium substrates in the presence or absence of two surfactants, cetyltrimethylammonium bromide and hexadecylpyridinium bromide, is studied by the current transient and electrochemical impedance measurements. A typical lithium-ion battery electrolyte based on lithium hexafluorophosphate in the mixture of ethylene carbonate and diethyl carbonate is used. The presence of the so-called SEI (solid electrolyte interphase) layer on the electrode surface is shown to have a significant effect on the electrodeposition process. It is also shown that the mechanism of lithium electrodeposition on copper and lithium substrates is different. It can be assumed that the observed effect of surfactants on the dendrite formation is associated not with the adsorption of surfactants on lithium and blocking the growth of deposits, but with the surfactant effect on the properties of the SEI layer formed at these substrates.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 5","pages":"355 - 364"},"PeriodicalIF":1.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141135584","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}

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Synthesis and Electrochemical Performance of Flexible and Freestanding Graphene-Encapsulated PANi@MnO2/ECNFs Nanoscale Architectures for Electrochemical Supercapacitors 用于电化学超级电容器的柔性独立石墨烯封装 PANi@MnO2/ECNFs 纳米结构的合成及其电化学性能

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Russian Journal of Electrochemistry Pub Date : 2024-05-09 DOI: 10.1134/S1023193524040086

Chao Pan, Li Dong

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A Correlation between the Electrochemical Behavior, and Antibacterial Activity of Some S-Triazino-Benzimidazoles 某些 S-三嗪基苯并咪唑的电化学行为与抗菌活性之间的相关性

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-09 DOI: 10.1134/S1023193524040025

R. Guedouar, W. Tahri, M. Abidi, S. Besbes-Hentati, M. M. Kammoun

{"title":"A Correlation between the Electrochemical Behavior, and Antibacterial Activity of Some S-Triazino-Benzimidazoles","authors":"R. Guedouar, W. Tahri, M. Abidi, S. Besbes-Hentati, M. M. Kammoun","doi":"10.1134/S1023193524040025","DOIUrl":"10.1134/S1023193524040025","url":null,"abstract":"The electrochemical behavior of the biologically active redox chemicals is essential in point of view antibacterial activity. In some cases, the electronic exchanges are coupled to chemical reactions that produce new oxidative or reductive species, which might form electrodeposits. This contribution presents a comparative study of the antibacterial activities and the anodic oxidation of S-triazino-benzimidazole derivatives substituted at the triazine ring with phenyl, 4-fluorophenyl and pentafluorophenyl groups. By combining bactericidal screening against E. coli, P. aeruginosa, S. aureus, and S. typhimurium, to a cyclic voltammetry investigation, it was revealed that the fluorine phenyl substituents in the S-triazine benzimidazole derivatives enhance the electrons ejection to the platinum disk and the subsequent chemical reactions. Additionally, by cycling of potential the non-fluorinated chemical produces a rather passive film on the electrode surface, whereas the fluorinated ones generate electroactive and electrocatalytic coatings. Comparing the results obtained with S-triazino-benzimidazole derivatives to those with 2-aminobenzimidazole, plausible mechanisms of their bactericidal action are suggested.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 4","pages":"303 - 313"},"PeriodicalIF":1.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140927220","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}

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Kinetics of Electrodeposition of Nickel–Cobalt–Alumina Composite Electrochemical Coating 镍-钴-氧化铝复合电化学涂层的电沉积动力学

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-09 DOI: 10.1134/S1023193524040074

K. V. Ovchinnikova, I. G. Bobrikova, I. Yu. Zhukova, A. A. Kuts, L. A. Degtyar

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Surface Degradation of Lithium–Manganese Spinel in Contact with Lithium-Hexafluorophosphate-Containing Electrolyte Solution 锂锰尖晶石与含六氟磷酸锂的电解质溶液接触时的表面降解现象

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-09 DOI: 10.1134/S1023193524040049

A. A. Koshkina, T. V. Yaroslavtseva, A. E. Ukshe, M. V. Kuznetsov, V. T. Surikov, O. V. Bushkova

{"title":"Surface Degradation of Lithium–Manganese Spinel in Contact with Lithium-Hexafluorophosphate-Containing Electrolyte Solution","authors":"A. A. Koshkina, T. V. Yaroslavtseva, A. E. Ukshe, M. V. Kuznetsov, V. T. Surikov, O. V. Bushkova","doi":"10.1134/S1023193524040049","DOIUrl":"10.1134/S1023193524040049","url":null,"abstract":"A set of computational and experimental methods is used in the study of chemical side interactions in the LiMn2O4-based lithium-ion cathodic half-cell over the 25–60°C temperature range. The degradation of LiMn2O4-spinel-based electrodes is shown to start upon the LiMn2O4 granules contacting the standard (basic) electrolyte solution (1 m LiPF6 in a mixture of ethylene carbonate and dimethyl carbonate (1 : 1, by wt)). It is established that under current-less conditions, the degradation of the LiMn2O4-based electrode is caused by the mutual thermodynamic instability between LiMn2O4 and the LiPF6 lithium salt. The equilibrium interaction products are determined, and the mechanism of the critical temperature influence on the degradation of lithium-ion batteries with lithium–manganese spinel is refined. A model is proposed for the primary surface layer at the LiMn2O4/electrolyte interface formation and evolution, which explains the distinctive features of the degradation processes in this system.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 4","pages":"263 - 282"},"PeriodicalIF":1.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140927330","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}

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Carboxymethyl Cellulose Based Biopolymer Electrolyte with Hybrid Fillers for Dye Sensitized Solar Cell 基于羧甲基纤维素的生物聚合物电解质与混合填料用于染料敏化太阳能电池

IF 1.1 4区工程技术

Russian Journal of Electrochemistry Pub Date : 2024-05-09 DOI: 10.1134/S1023193524040098

Neeru Sharma, Ashlesha P. Kawale, Arti Srivastava, Priyanka Chawla, Shivansh Tripathi, Mridula Tripathi

{"title":"Carboxymethyl Cellulose Based Biopolymer Electrolyte with Hybrid Fillers for Dye Sensitized Solar Cell","authors":"Neeru Sharma, Ashlesha P. Kawale, Arti Srivastava, Priyanka Chawla, Shivansh Tripathi, Mridula Tripathi","doi":"10.1134/S1023193524040098","DOIUrl":"10.1134/S1023193524040098","url":null,"abstract":"The aim of the present study is to evaluate the potential of both the use of zinc oxide (ZnO) nanoparticles as primary filler and graphene as secondary filler in carboxy methyl cellulose based polymer electrolyte. The films were characterized structurally and morphologically by X-ray diffraction (XRD), Fourier-transform infra red spectroscopy (FT-IR), scanning electron microscopy (XRD). XRD results showed that ZnO nanoparticles inclusion reduced the crystallinity of the prepared biopolymer electrolyte. Addition of graphene as secondary filler further reduced the crystallinity of the prepared biopolymer electrolyte film. The FTIR technique and SEM images confirmed the complexation of salts with the polymer matrix. Due to graphene’s ability to create conductive layers, the inclusion of a little amount of it as a supplementary filler increased the A.C. conductivity from 1.63 × 10–5 to 2.6 × 10–4 S cm–1. The synergistic effects of both fillers contributed to raising the polymer electrolyte film’s electrical conductivity. Utilizing this polymer electrolyte layer enabled the creation of a solid state DSSC with an efficiency of 2.6%.","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 4","pages":"314 - 320"},"PeriodicalIF":1.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140927203","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