Russian Journal of Electrochemistry最新文献

{"title":"Anodic Formation and Photoelectrochemical Characteristics of Ag(I) Oxide on the Ag–Pd-System Alloys","authors":"I. A. Belyanskaya,&nbsp;M. Yu. Bocharnikova,&nbsp;S. N. Grushevskaya,&nbsp;O. A. Kozaderov,&nbsp;A. V. Vvedenskii,&nbsp;S. V. Kannykin","doi":"10.1134/S1023193524700046","DOIUrl":"10.1134/S1023193524700046","url":null,"abstract":"<p>Silver(I) oxide is considered as one of the promising materials for photoelectrochemical technologies because it has an optimal band gap, relatively low cost, and a wide variety of production methods. However, its characteristics such as quantum efficiency, morphology, and crystal structure parameters require optimization, which can be achieved by applying the most suitable method for the obtaining of the material. One of the fairly simple methods is the anodic oxidation of silver or its alloys in alkaline media, which allows obtaining oxide phases with a controlled composition and predictable properties by varying the concentration of the alloy components and electrolysis mode. The purpose of this work is to reveal the features of anodic formation and to determine the photoelectrochemical characteristics of silver(I) oxide on silver–palladium alloys in deaerated 0.1 M KOH solution. The regularities of the anodic formation of Ag(I) oxide on alloys of the Ag–Pd-system with the palladium atomic fraction from 0.05 to 0.20 in deaerated 0.1 M KOH solution were studied by non-stationary electrochemical methods of cyclic voltammetry, chronoamperometry with synchronous recording of photocurrent, and photopotential measurements. The phase composition of the alloys (alpha phase) was determined from the results of X-ray diffractometry. Chemical composition was determined by energy dispersive microanalysis. Photoelectrochemical parameters were calculated from the results of the photocurrent and photopotential measurements. It was established that the Ag(I) oxide anodically formed on silver–palladium alloys is characterized by <i>n</i>-type conductivity and the predominance of donor defects. On the alloys with a relatively low palladium concentration (5 and 10 at %), Ag(I) oxide with a higher concentration of defects is formed, while on alloys with a relatively high palladium concentration (15 and 20 at %), with a lower concentration of defects than on pure silver.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 6","pages":"468 - 477"},"PeriodicalIF":1.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503915","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}

{"title":"Nanocomposite of Graphene–Phosphorene Structures with Cobalt Phosphide as an Effective Electrocatalyst for Hydrogen Evolution in Acidic Medium","authors":"V. K. Kochergin,&nbsp;R. A. Manzhos,&nbsp;E. N. Kabachkov,&nbsp;I. I. Khodos,&nbsp;A. G. Krivenko","doi":"10.1134/S1023193524700095","DOIUrl":"10.1134/S1023193524700095","url":null,"abstract":"<p>Materials containing cobalt phosphide nanoparticles are among the most promising electrocatalysts for the hydrogen evolution reaction in terms of compromise between activity, cost, and durability. A simple and effective approach to fabricating a nanocomposite of graphene–phosphorene structures decorated with CoP nanoparticles 2–5 nm in size is proposed. The nanocomposite was fabricated by the electrochemical exfoliation of black phosphorus followed by the solvothermal synthesis. The synthesis was carried out in the presence of few-layer graphene structures doped with nitrogen atoms in the solution containing Co²⁺ ions. The electrocatalyst exhibited high activity and stability towards hydrogen evolution reaction in the acidic medium. In order to achieve a current density of 10 mA cm^–2, an overpotential of ~220 mV was required, and the Tafel slope was ~63 mV dec^–1. It is suggested that this result is due to both the synergistic effect of the interaction between graphene and phosphorene structures and the electrocatalytic activity of CoP nanoparticles, which are located at the edges of phosphorene structures.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 6","pages":"421 - 428"},"PeriodicalIF":1.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503909","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}

{"title":"Synthesis, Ionic Mobility, and Conductivity of Composites Based on Tin and Lead Difluorides According to the 19F NMR and Impedance Spectroscopy Data","authors":"A. B. Slobodyuk,&nbsp;I. A. Telin,&nbsp;M. M. Polyantsev,&nbsp;N. F. Uvarov,&nbsp;V. Ya. Kavun","doi":"10.1134/S1023193524700058","DOIUrl":"10.1134/S1023193524700058","url":null,"abstract":"<p>The ionic mobility and conductivity of composites and compounds of the eutectic and close composition obtained by different methods in the PbF₂–SnF₂ system are studied based on the ¹⁹F NMR and impedance data. The stages of transformation of the ¹⁹F NMR spectra of these samples, their connection with the types of ionic movements, and the possible factors determining their ionic conductivity are considered. It is shown that the composition of the majority of composites includes the fluorite phase characterized by the high values of ionic mobility and conductivity. In the region close to the eutectic, a single-phase sample with the fluorite structure is obtained for the first time. The conductivity of this phase (5 × 10^–3 S/cm at 390 K) makes it possible to consider it as the basis for synthesizing functional materials.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 6","pages":"459 - 467"},"PeriodicalIF":1.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503914","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}

{"title":"Electrodeposition of Photosensitive Layers Based on Conducting Polymers and Zinc Phthalocyaninate, Their Structure and Photoelectrical Properties","authors":"O. L. Gribkova,&nbsp;V. A. Kabanova,&nbsp;I. D. Kormshchikov,&nbsp;A. R. Tameev,&nbsp;A. A. Nekrasov","doi":"10.1134/S102319352470006X","DOIUrl":"10.1134/S102319352470006X","url":null,"abstract":"<p>Photosensitive hybrid layers are obtained by electrochemical polymerization of pyrrole and 3,4‑ethylenedioxythiophene in the presence of water-soluble sodium salt of zinc octa(3′,5′-dicarboxyphenoxy)phthalocyaninate containing 16 ionogenic carboxylate groups. The process of the hybrid layer electrodeposition was found to occur most effectively in galvanostatic and potentiostatic modes on the sublayer of poly-3,4-ethylenedioxythiophene–polyacid complex. The electronic and chemical structure and morpho-logy of the hybrid layers of polypyrrole obtained in the presence of zinc octa(3′,5′-dicarboxyphenoxy)phthalocyaninate were studied. Possible reasons are considered why the measured values of photosensitivity and external quantum yield of charge-carrier generation in polypyrrole–zinc octa(3′,5′-dicarboxyphenoxy)phthalocyaninate are several times higher than in poly-3,4-ethylenedioxythiophene–zinc octa(3′,5′-dicarboxyphenoxy)phthalocyaninate.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 6","pages":"448 - 458"},"PeriodicalIF":1.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503913","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}

{"title":"Voltammetric Sensor Based on Modified Carbon Paste Electrode for Determination of Vitamin B6","authors":"Hadi Soltani-Nejad,&nbsp;Hadi Beitollahi,&nbsp;Fariba Garkani Nejad","doi":"10.1134/S1023193524700034","DOIUrl":"10.1134/S1023193524700034","url":null,"abstract":"<p>In this work, the vitamin B₆ detected by using a voltammetric sensor based on the use of MoS₂ nanosheets and ionic liquid-modified carbon paste electrode (MoS₂-IL/CPE). Electrochemical performance in the detection of vitamin B₆ at the MoS₂-IL/CPE was investigated by using cyclic voltammetry (CV), chronoamperometry (CHA), and differential pulse voltammetry (DPV). Compared with the bare CPE, the oxidation peak current of vitamin B₆ at the MoS₂-IL/CPE was significantly increased. A good linear relationship between the oxidation peak current and the vitamin B₆ concentration was found in the range of 5.0–900.0 µM, with a detection limit of 1.5 µM. In addition, MoS₂-IL/CPE was successfully used for determination of vitamin B₆ in the real samples, and was demonstrated to be an effective and sensitive method.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 6","pages":"478 - 485"},"PeriodicalIF":1.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503916","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}

{"title":"Mixed-Alkali Effect in Glasses of Different Classes in the Framework of a Microinhomogeneous-Glass-Structure Model","authors":"A. Yu. Dobosh,&nbsp;I. A. Sokolov,&nbsp;N. N. Khimich","doi":"10.1134/S1023193524700071","DOIUrl":"10.1134/S1023193524700071","url":null,"abstract":"<p>By example of the silicate glasses with the compositions (33.3 – <i>x</i>)Li₂O·<i>x</i>Na₂O·66.7SiO₂ and (33.3 – <i>x</i>)K₂O·<i>x</i>Na₂O·66.7SiO₂ with purely cationic conductivity and chalcogenide glasses (Ag–Cu)_0.33AsSe_1.5 and (Ag–Cu)_0.61AsSe_1.5 with mixed ionic–electronic conductivity, consideration has been given to the describing of the mixed-alkali effect in bimetallic glasses in the framework of a microinhomogeneous-glass-structure model using additive schemes involving concentration dependences of conductivity of monometallic glasses with the monovalent metal content equal to that in the mixed glass. A satisfactory agreement between experimental and calculated data is demonstrated. Herein, in the alkaline silicate glasses the non-linear variation of the conductivity parameters is connected with the migration of two alkaline cations and sequential replacement of the conductivity mainly involving an ion by that involving another ion. In the studied chalcogenide glasses, a similar varying of electrical parameters is connected with the replacement of the majority current carrier upon the equivalent substituting of copper for silver in the glass bulk: the mixed, predominantly ionic conductivity is replaced by purely electronic one.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 6","pages":"435 - 447"},"PeriodicalIF":1.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503911","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}

{"title":"Boosting the Capacitive Property of Ti3C2Tx MXene by Using Mechanochemical Activation Approach","authors":"Mingli Ding,&nbsp;Xinyue Zhang,&nbsp;Wu Zhang","doi":"10.1134/S1023193524700010","DOIUrl":"10.1134/S1023193524700010","url":null,"abstract":"<p>We demonstrated a mechanochemically-assisted approach to synthesize Ti₃C₂T_<i>x</i> MXene with crinkled morphology with enhanced energy storage performance. The fabrication efficiency and capacitive property of the resulting Ti₃C₂T_<i>x</i> MXene was significantly promoted under the aid of a high-energy ball mill: (i) removal of Al from pristine Ti₃AlC₂ powder was achieved after 8 h of etching in 2% hydrochloric acid, while 18 h was sufficient in 5% hydrochloric acid for conventional experimental as reported in previous literature; (ii) the capacitive property of the as-prepared samples increases with etching time, the 8-h mechanochemically etched sample showed a specific capacitance of 129 F/g at 10 mV/s in 1 M H₂SO₄ electrolyte, while no typical energy storage behavior was found for the sample without mechanochemical aid. The contribution of double layer, pseudocapacitive and diffusion-limited capacitance for the total specific capacitance was quantitively analyzed for the first time. The as-prepared sample exhibits higher specific capacitance than the previously reported MXene and MXene-based composites. The mechanochemically-assisted approach showed good capability in preparing Ti₃C₂T_<i>x</i> MXene with enhanced capacitive property.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 6","pages":"495 - 506"},"PeriodicalIF":1.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141405606","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}

{"title":"A Novel Detection Method of Fe(II) Based on Nanopore Sensor","authors":"H. L. Wang,&nbsp;T. Li,&nbsp;Q. Q. He,&nbsp;C. Y. Cao,&nbsp;X. Chen","doi":"10.1134/S1023193524050082","DOIUrl":"10.1134/S1023193524050082","url":null,"abstract":"<p>A novel Fe(II) detection method was developed on nanopore platform in this work. The incubation mixture of dumbbell DNA and Bleomycin (BLM) wounld produce blockage signals on nanopore sensor. The addition of Fe(II) would generate BLM·Fe(II) to destroy the dumbbell DNA molecules and release short-strand oligonucleotide fragments which can produce spiked current signals on nanopore sensor. The statistical analysis shows the intervals between adjacent blockage signals decrease with elevated concentration of Fe(II), and a linear relationship between the event intervals versus the Fe(II) concentration is confirmed in the range of 0.1 to 500 nM with detection limit as low as 0.12 nM. Varied kinds of metal ions were examined for comparison, demonstrating high selectivity for Fe(II) detection. The proposed method may be potentially applied for qualitative and quantitative detection of Fe(II) due to its high sensitivity and selectivity.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 5","pages":"386 - 391"},"PeriodicalIF":1.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141143002","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}

{"title":"The Effect of Decalin and Perfluorodecalin on Dendrite Formation at Metallic Lithium Anodes during Their Operation","authors":"S. S. Alpatov,&nbsp;F. A. Vasiliev,&nbsp;O. A. Semenikhin","doi":"10.1134/S1023193524050045","DOIUrl":"10.1134/S1023193524050045","url":null,"abstract":"<p>In this work, we studied the effect of additions of decahydronaphthalene (decalin) and its derivative, perfluorodecalin (octadecafluorodecalin) on the lithium metal deposition and dissolution, in particular, the dendrite formation, at the anodes of lithium secondary power sources in an electrolyte based on lithium hexafluorophosphate in the mixture of ethylene carbonate and diethyl carbonate. The study was carried out using the methods of current transients and electrochemical impedance. The results showed that, in contrast to traditional cationic surfactants cetyltrimethylammonium bromide and hexadecylpyridinium bromide, which we have studied earlier, the decalin and perfluorodecalin demonstrated specific interaction with the surface of the lithium electrode. Moreover, the interaction with decalin is so strong that it actually blocks the processes of both lithium deposition and anodic dissolution at the surface of the lithium electrode. The interaction of perfluorodecalin with the lithium surface turned out to be weaker. As a result, perfluorodecalin does not interfere with the cycling of the lithium-metal anode, but at the same time shows an inhibitory effect on the dendrite formation. In the electrolyte added with perfluorodecalin, the lithium anode was able to undergo more than 80 charging–discharging cycles with a Coulomb efficiency of 70–80%, while without the additive, the number of cycles was less than 40, and the Coulomb efficiency was 60% or lower.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 5","pages":"376 - 385"},"PeriodicalIF":1.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141145722","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}

{"title":"Selective Detection of Glucose by Linear Sweep Voltammetry Using a Copper–Polyaniline Modified Glassy Carbon Electrode","authors":"P. Mirzavand,&nbsp;B. Zargar,&nbsp;N. Pourreza","doi":"10.1134/S1023193524050069","DOIUrl":"10.1134/S1023193524050069","url":null,"abstract":"<p>Cu-doped polyaniline (Cu–PA) was prepared by chemical oxidation aniline in the presence of Cu ions. By cyclic voltammetry (CV), the electrochemical behavior of glassy carbon electrode modified with Cu–PA was studied in NaOH solution. Since the hydrolysis of glucose occurs in an alkaline solution and the redox peak of Cu–PA depends on the concentration of OH^– concentration, here, a new and cost-effective strategy for the non-enzymatic determination of glucose was proposed based on the inhibitory effect of glucose on the electrical activity of the Cu–PA composite. The cathodic current decreased directly after the addition of glucose and demonstrated that the Cu–PA was sensitive to glucose in an alkaline medium. Using linear sweep voltammetry and under optimal condition, the sensor exhibited a linear calibration graph in the concentration range of 0.11–1.66 mM with a limit of detection (LOD) of 0.044 mM (S/N = 3). In addition, the sensor showed desirably accurate selectivity for detecting and recovering glucose in humans serum samples, good reproducibility, and good stability.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 5","pages":"400 - 410"},"PeriodicalIF":1.1,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141130064","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}