Russian Journal of Electrochemistry最新文献

{"title":"Oxygen Mobility of Samarium Doped Neodymium Nickelates Sintered by E-Beams","authors":"V. A. Sadykov,&nbsp;E. M. Sadovskaya,&nbsp;Yu. N. Bespalko,&nbsp;E. A. Smal’,&nbsp;O. A. Bulavchenko,&nbsp;N. F. Eremeev,&nbsp;I. P. Prosvirin,&nbsp;M. A. Mikhailenko,&nbsp;M. V. Korobeynikov","doi":"10.1134/S1023193524601670","DOIUrl":"10.1134/S1023193524601670","url":null,"abstract":"<p>Ruddlesden–Popper phases are known materials for electrochemical devices such as solid oxide fuel cells/electrolyzers, oxygen separation membranes. Doping A-site with lanthanides with less radii can allow increasing the oxygen mobility, however, this problem is still not studied well. This work aims at studying phase composition and transport properties of Sm doped Nd nickelates sintered by radiation-thermal technique using e-beams. Nd_{2 –} _<i>x</i>Sm_<i>x</i>NiO_{4 + δ} (<i>x</i> = 0.2, 0.4) were synthesized by modified Pechini technique and sintered by e-beams at 1150–1250°C. The materials obtained were characterized by X-ray diffraction, X‑ray photoelectron spectroscopy and temperature-programmed isotope exchange of oxygen with C¹⁸O₂ in a flow reactor. The surface oxygen is present in two forms differing in binding energy. According to the temperature-programmed isotope exchange data, the samples exhibit nonuniformity in the oxygen mobility, and slow diffusion channel is present for the sample with <i>x</i> = 0.4. Such an oxygen diffusion features are probably related to the effect of doping and radiation-thermal sintering on the structure with formation of admixed phases, hampering the cooperative migration due to emergence of local defects and variation of the surface and grain boundary composition.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"61 2","pages":"28 - 39"},"PeriodicalIF":1.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845788","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 Role of Iodine and Pyridine Bases in the Alcohol Electrocatalytic Oxidation Mediated by 4-AcNH-TEMPO","authors":"E. N. Shubina,&nbsp;V. P. Kashparova,&nbsp;Ya. A. Ricker,&nbsp;D. V. Steglenko,&nbsp;I. Yu. Zhukova","doi":"10.1134/S1023193524601621","DOIUrl":"10.1134/S1023193524601621","url":null,"abstract":"<p>The role of iodine, pyridine bases, and the nitroxyl radical 4-AcNH-TEMPO in the electrooxidative conversion of alcohols into carbonyl compounds in a two-phase medium CH₂Cl₂/NaHCO₃(aq) is studied. Using cyclic voltammetry, it was established that in a weakly alkaline medium (pH 8.6) the iodide ion is oxidized to active forms of iodine (I₂ and I⁺), which are terminal oxidizing agents converting the nitroxyl radical into oxoammonium cations necessary for the oxidation of alcohol. It has been established spectrophotometrically that the pyridine bases are capable of stabilizing I₂ and I⁺ as [PyI₂], [PyI]⁺ complexes whose formation occurs predominantly in the organic phase. The stabilized forms of iodine effectively convert the nitroxyl radical into oxoammonium cations at the electrode interface. The formation of a catalytic complex between the oxoammonium cations and the pyridine base occurs in the aqueous phase. The cyclic-voltammetry studies showed that the rate of nitroxyl-radical-mediated alcohol oxidation increased up to fourfold in the presence of the pyridine base, as compared to the oxidative transformation in the absence of the pyridine base. This proves the advantages of the nitroxyl radical/pyridine base catalytic system and specifies the role of the pyridine base as a promoter in the alcohol indirect electrooxidation.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"61 2","pages":"17 - 27"},"PeriodicalIF":1.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845787","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 Tremag Co–Ni–Fe Magnetic Films","authors":"R. D. Tikhonov","doi":"10.1134/S1023193525700016","DOIUrl":"10.1134/S1023193525700016","url":null,"abstract":"<p>Magnetic films for the creating of magnetic field amplifiers must have a high magnetic permeability. The magnetization characteristics of electrochemically deposited Co–Ni–Fe films of variable composition are investigated at the nanometer scale using a magnetic force microscope. The difference in the magnetization of the samples is explained proceeding from peculiarities of their local domain and crystallographic structure. The high magnetic permeability in weak magnetic fields is supposed to be determined by the tremag alloy Co₆₀Ni₂₀Fe₂₀ crystal lattice, in which the fcc and bcc cells are neighboring each other.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"61 2","pages":"40 - 48"},"PeriodicalIF":1.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845789","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":"Barrier Layers Based on Refractory Metals Contacting High-Temperature Thermoelements","authors":"E. P. Korchagin,&nbsp;Yu. I. Shtern,&nbsp;I. N. Petukhov,&nbsp;M. Yu. Shtern,&nbsp;M. S. Rogachev,&nbsp;R. M. Ryazanov","doi":"10.1134/S1023193524601232","DOIUrl":"10.1134/S1023193524601232","url":null,"abstract":"<p>An electrochemical method is proposed for the forming of contacts to high-temperature thermoelements with barrier layers based on refractory-metal alloys. The contacts are destined for thermoelements with operating temperatures up to 900 K. The barrier layers have specific resistance of no more than 15.3 × 10⁻⁸ Ω m and specific contact resistance of no more than 1.5 × 10⁻⁹ Ω m². The best results were obtained for barrier layers based on Mo–Ni alloy with a Mo content of 36.5 wt %. Ag films obtained by electrochemical deposition were used as a commutation layer in the contacts. The contacts were shown to be thermally stable at the limiting operating temperatures of the thermoelements and have an adhesive strength of at least 10.3 MPa.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"61 2","pages":"49 - 56"},"PeriodicalIF":1.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845732","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":"Inhibitory Protection of Low-Carbon Steel in a Flow of Phosphoric Acid Solutions Containing Iron(III) Phosphate","authors":"Ya. G. Avdeev,&nbsp;A. V. Panova,&nbsp;T. E. Andreeva","doi":"10.1134/S1023193524601293","DOIUrl":"10.1134/S1023193524601293","url":null,"abstract":"<p>The corrosion of low-carbon steel is studied in a flow of H₃PO₄ solutions containing FePO₄ and also with addition of a mixture of corrosion inhibitors, particularly, a 3-substituted derivative of 1,2,4-triazole (IFKhAN-92) and KNCS. In such solutions, the partial reactions of the iron anodic ionization and the cathodic reduction of H⁺ and Fe(III) cations proceed on steel. The former two reactions are controlled by kinetics, whereas the latter reaction is diffusion-controlled. The accelerating effect of FePO₄ on the steel corrosion in H₃PO₄ solutions is mainly due to the reduction of Fe(III). In acid solutions containing inhibitors, Fe(III) cations continue to accelerate all partial reactions on steel. Despite this accelerating effect, the mixtures of IFKhAN-92 and KNCS still exert a strong inhibitory effect on the electrode reactions on steel, which is noteworthy. The data on the corrosion of low-carbon steel in such flows, obtained based on the mass loss of metal samples, adequately agree with the results acquired when studying the partial electrode reactions. The accelerating effect of FePO₄ on steel corrosion in a flow of H₃PO₄ solutions is observed, including the media containing inhibitors. In these media, the steel corrosion is determined by convection, which is typical of diffusion-controlled reactions. The mixed inhibitors IFKhAN-92 + KNCS are shown to considerably inhibit the steel corrosion in a flow of H₃PO₄ solutions containing FePO₄, which is a result of the efficient suppression of all partial electrode reactions on this metal.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"61 1","pages":"1 - 10"},"PeriodicalIF":1.1,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676213","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":"Anodic Dissolution and Corrosion of Aluminum in KOH Solutions in 90% Ethanol Containing Additives of Gallium and Indium Compounds. Inhibitory Effect of Citric Acid","authors":"K. V. Rybalka,&nbsp;L. A. Beketaeva","doi":"10.1134/S1023193524601542","DOIUrl":"10.1134/S1023193524601542","url":null,"abstract":"<p>The effect of citric acid monohydrate additive on the anodic dissolution and corrosion rate of aluminum in the KOH solutions in 90% ethanol containing additives of gallium and indium compounds is considered. It is shown that an addition of citric acid monohydrate to the solution enables reducing the aluminum corrosion current without decreasing its anodic dissolution rate. When 5 × 10^–4 M citric acid monohydrate is introduced into the solution, its inhibition efficiency is 58%. The discharge galvanostatic curves in this electrolyte contain a discharge plateau up to a current density of 16 mA/cm².</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"61 1","pages":"11 - 16"},"PeriodicalIF":1.1,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676212","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":"Kinetics of Nucleation at the Electrodeposition of Zinc and Nickel from Ammonium Chloride Electrolytes","authors":"A. E. Tinaeva,&nbsp;O. A. Kozaderov","doi":"10.1134/S1023193524700368","DOIUrl":"10.1134/S1023193524700368","url":null,"abstract":"<p>Zinc–nickel coatings based on the zinc-enriched gamma phase exhibit the maximum corrosion resistance and form the basis of the production of highly electrocatalytically active nanoporous nickel by selective dissolution. The electrodeposition of Zn–Ni alloys is the most widely used method of their preparation which proceeds by the mechanism of anomalous codeposition, where the deposition rate of the electropositive component (nickel) is lower as compared with the electronegative component (zinc). To obtain coatings of the particular morphology, chemical and phase composition, it is necessary to know the kinetics of the cathodic deposition of Zn–Ni alloys in the stage of heterogeneous nucleation, which is the goal of this study. The kinetics of this process is studied in non-stirred ammonium chloride electrolytes using the methods of cyclic voltammetry and chronoamperometry. The mechanism of heterogeneous nucleation at the electrodeposition of zinc and nickel is determined using the approach proposed by Palomar-Pardavé et. al which takes into account the contributions to the total cathodic current made by the parallel reaction of hydrogen reduction and the electric double layer charging. The nucleation mechanism for zinc–nickel coatings is described using the model of Scharifker–Hills for the electrodeposition of binary alloys additionally modified by taking into account the experimentally determined dependence of the composition of zinc–nickel coatings on the time in the stage of cathodic nucleation of the deposit. Using the method of energy-dispersive X-ray spectroscopy, the anomalous character of the deposition of Zn–Ni coatings is confirmed, where the ratio of atomic fractions Ni/Zn turns out to be lower than the ratio of concentrations of ions Ni²⁺/Zn²⁺ in the electrolyte. It is found that both during the electrodeposition of zinc and nickel from their individual solutions and during their anomalous codeposition, the nucleation rate constant increases with an increase in the cathodic potential but in average does not exceed 3 s^–1, which points to the predominantly progressive nucleation. The growth of the new phase, regardless of its chemical composition, is limited by the 3D-diffusion of zinc and nickel ions to the electrode surface. The nucleation site density depends weakly on the deposition potential, decreasing with the transition from zinc to nickel and zinc–nickel alloys. As expected, the contribution of the side reaction of hydrogen reduction is the maximum for nickel electrocrystallization and decreases with the transition to Zn–Ni alloys and zinc, increasing with an increase in the cathodic potential, in agreement with the values of current efficiency.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 10","pages":"795 - 806"},"PeriodicalIF":1.1,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434748","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 TiO2 Nanoparticles and the Liquid-Phase Therapy on the Resistance of the Interphase Lithium/Polymer Electrolyte with the Introduction of Ionic Liquid","authors":"G. R. Baymuratova,&nbsp;A. V. Yudina,&nbsp;K. G. Khatmullina,&nbsp;A. A. Slesarenko,&nbsp;O. V. Yarmolenko","doi":"10.1134/S102319352470037X","DOIUrl":"10.1134/S102319352470037X","url":null,"abstract":"<p>It is studied how the treatment of a metal lithium surface with a 1 M LiN(CF₃SO₂)₂ solution in the 1,3-dioxolane/1,2-dimethoxyethane (2 : 1) mixture affects the resistance of the interphases formed by lithium with the polymer and nanocomposite electrolytes based on the 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid. The liquid-phase therapy is shown to reduce the resistance at the Li/electrolyte interphase by a factor of 2.5 at room temperature and extend the working temperature range to –30°C. The introduction of TiO₂ nanoparticles into the polymer electrolyte, along with the liquid-phase therapy of both the cathode and the Li-anode, provides a high and stable discharge capacity of the Li//LiFePO₄ battery for 100 charge–discharge cycles.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 10","pages":"807 - 812"},"PeriodicalIF":1.1,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434749","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":"Role of Nonlocal Electrostatic Effects in the Stabilization of Monovalent Cations in an Aqueous Cavity Surrounded by a Weakly Polar Environment","authors":"A. A. Rubashkin,&nbsp;V. A. Vigont,&nbsp;M. A. Vorotyntsev","doi":"10.1134/S1023193524700393","DOIUrl":"10.1134/S1023193524700393","url":null,"abstract":"<p>Earlier, we developed (<i>Russ. J. Electrochem</i>., 2018, vol. 54, p. 879) a new nonlocal electrostatic method for calculating an electric field distributions in systems containing spatially constrained regions filled with polar media with nonlocal dielectric properties. This method is used for nonlocal electrostatic analysis of the stabilization of a monovalent cation in a spherical cavity filled with water and surrounded by a local dielectric. For one- and three-mode models of the dielectric function, nonlocal electrostatic formulas are obtained for the field distribution inside such a cavity, if the ion is located at its center. The nonlocal electrostatic relations are derived for the change in the cation solvation energy ΔW during its transfer from solution to the center of such a cavity. It is shown that when the correlation length of water in the cavity decreased as compared with the solution (at the same values of the dielectric constant of water in the cavity and in the solution bulk), the amount of work required for the ion transfer from the solution into the cavity (−Δ<i>W</i>) decreased significantly as compared to that calculated by using the local theory used in the work of Roux, B. and MacKinnon, R. (<i>Science</i>, 1999, vol. 285, p. 100).</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 10","pages":"823 - 842"},"PeriodicalIF":1.1,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434743","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":"Dimethylglyoximate Derived Nickel Oxide Nanowires for Trace Level Amperometric Detection of Hydroquinone","authors":"M. Arain,&nbsp;A. Nafady,&nbsp;M. A. U. Haq,&nbsp;H. M. Asif,&nbsp;H. B. Ahmad,&nbsp; Mujeeb-ur-Rehman,&nbsp;R. A. Soomro,&nbsp;A. Balouch,&nbsp;A. Jabbar,&nbsp; Sirajuddin","doi":"10.1134/S102319352470040X","DOIUrl":"10.1134/S102319352470040X","url":null,"abstract":"<p>Here we illustrate the use of dimethylglyoximate (DMG) as shape directing agent for the synthesis of nickel oxide nanowires (NiONWs) via hydrothermal process followed by calcination at elevated temperature. As-prepared NiONWs were characterized through scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) techniques and Fourier Transform Infra-red (FTIR) spectroscopy. The surface area of 27 m² g^–1 and pore diameter of 22 nm was true for the product. The prepared NiONWs were drop casted over the active surface of glassy carbon electrode (GCE) to apply it for the electrochemical sensing of hydroquinone based on cyclic voltammetry (CV) and amperometry techniques. The phosphate buffer solution (PBS) of pH 5.8 was used for the measurement of hydroquinone during electrochemical investigation. The developed sensor displayed a wide linear range of 0.5 to 11 µM for hydroquinone detection with sensitivity of 200 µA mM^–1 cm^–2 and limit of detection (LOD) equal to 0.01 µM. The sensor was further examined and found to be highly stable and extremely selective for the oxidation of hydroquinone. The sensor was successfully applied for amperometric detection of hydroquinone from water samples.</p>","PeriodicalId":760,"journal":{"name":"Russian Journal of Electrochemistry","volume":"60 10","pages":"843 - 851"},"PeriodicalIF":1.1,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434745","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}