Bibliografías temáticas / Alkaline Iron Electrode

Literatura académica sobre el tema "Alkaline Iron Electrode"

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Publicado: 6 de septiembre de 2023

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Artículos de revistas sobre el tema "Alkaline Iron Electrode"

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Oliveira, João Pedro Jenson de, Acelino Cardoso de Sá y Leonardo Lataro Paim. "Electrocatalysis of Ethanol and Methanol Electrooxidation by Composite Electrodes with NiOOH/FeOOH Supported on Reduced Graphene Oxide onto Composite Electrodes". Chemistry Proceedings 2, n.º 1 (9 de noviembre de 2020): 2. http://dx.doi.org/10.3390/eccs2020-07523.

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This paper presents graphite/paraffin composite electrodes modified with microparticles of nickel (Ni) and Ni-Fe alloy anchored in reduced graphene oxide (rGO); these electrodes were made by electrosynthesis. Firstly, the electrodeposition of reduced graphene oxide was made by cyclic voltammetry (CV) onto the graphite/paraffin electrodes’ surface. After electrodeposition of the rGO, iron and nickel were electrodeposited by CV with successive scans. Finally, the formation of iron-nickel oxyhydroxide on the electrode surface was performed by cyclic voltammetry in alkaline medium. The composites were investigated by field emission gun scanning electron microscopy (FEG-SEM); it was observed that the Ni microparticles had spherical shapes, while the Ni-Fe alloy did not present a defined shape. The composite electrodes were used to analysis ethanol and methanol electrooxidation in an alkaline medium of 0.10 mol L−1 of NaOH in a potential range of from −0.20 to 1.0 V (vs. Ag/AgCl) at 50 mV s−1 by CV. The electrodes were able to make the electrooxidation of ethanol at a potential of around 0.57 V for the electrode constituted by the Ni-Fe alloy and around 0.61 V for the electrode modified with Ni, and for methanol in a potential around 0.57 V for the Ni-Fe alloy and around 0.66 V for the Ni electrode. The Ni-Fe alloy electrodes showed the electrocatalysis of the alcohols in relation to Ni electrodes.
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Popczyk, Magdalena y B. Łosiewicz. "The Hydrogen Evolution Reaction on Fe Electrode Material in 1 M NaOH Solution". Solid State Phenomena 228 (marzo de 2015): 252–57. http://dx.doi.org/10.4028/www.scientific.net/ssp.228.252.

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Kinetics of hydrogen evolution reaction (HER) was investigated in 1 M NaOH solution at room temperature on a polycrystalline Fe electrode material which was electrochemically activated and unactivated. Studies of the HER were carried out using steady-state polarization and electrochemical impedance spectroscopy (EIS) measurements. It was found that for the Fe electrode material after activation atj= -320 mA cm-2for 24 h, the increase in the catalytic activity towards the HER was observed in comparison with that on the unactivated iron electrode material.Acimpedance behavior of the Fe electrode changed from a typical for smooth electrodes before activation (one time constant in the circuit) to that being characteristic for porous electrodes after activation (two time constants in the circuit). The reason for that is formation of solid products of the iron corrosion in alkaline solution which can cause passivation of the electrode surface and catalyse the HER.
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Weinrich, Henning, Markus Gehring, Hermann Tempel, Hans Kungl y Rüdiger-A. Eichel. "Electrode thickness-dependent formation of porous iron electrodes for secondary alkaline iron-air batteries". Electrochimica Acta 314 (agosto de 2019): 61–71. http://dx.doi.org/10.1016/j.electacta.2019.05.025.

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Kuzminykh, Maria M., Victoria V. Panteleeva y Anatoliy B. Shein. "CATHODIC HYDROGEN EVOLUTION ON IRON DISILICIDE. I. ALKALINE SOLUTION". IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, n.º 1 (30 de diciembre de 2018): 38–45. http://dx.doi.org/10.6060/ivkkt.20196201.5745.

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The kinetics of hydrogen evolution reaction on FeSi2-electrode in 1.0 M NaOH solution has been studied using methods of polarization and impedance measurements. With the help of diagnostic criteria for the hydrogen evolution reaction mechanisms based on the analysis of the dependence of the parameters of the equivalent electric circuit on overvoltage, it was established that the reaction of hydrogen evolution on iron disilicide in the alkaline electrolyte proceeds along the discharge - electrochemical desorption route, where desorption is the rate-determining stage. Both stages are irreversible, the transfer coefficients of the stages are equal (α1 = α2 = α), simultaneously the hydrogen absorption reaction by the electrode material proceeds in the diffusion mode (in the whole investigated range of potentials). It was found that the adsorption of atomic hydrogen is described by the equation of the Langmuir isotherm. The influence of various methods of modifying of the surface of FeSi2-electrode on the kinetics and mechanism of the cathodic process has been studied. It was found that the modification of the disilicide surface by hydrogenation at a current density of i = 30 mA/cm2, an anodic etching in 0.5 M H2SO4 at the potential E = 0.4 V relative to the standard hydrogen electrode, an anodic etching in 1.0 M NaOH at the potential E = 0.1 V, chemical etching in 5.0 M NaOH at 70 °C reduce the overvoltage of hydrogen evolution, but the mechanism of the cathodic process does not change as a result of the modification. Reduction of the overvoltage of hydrogen evolution on iron disilicide is due to the action of two factors: the development of the surface and the change in the composition of the surface layer of the electrode. It has been concluded that FeSi2 in the alkaline electrolyte is a promising electrode material that exhibits activity in the electrolytic hydrogen evolution reaction.
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YAMAMOTO, Yoshifumi. "Electrochemical Behavior of Iron Electrodes in Alkaline Solution II. Activation of Electrode". Denki Kagaku oyobi Kogyo Butsuri Kagaku 60, n.º 8 (5 de agosto de 1992): 725–28. http://dx.doi.org/10.5796/electrochemistry.60.725.

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Vijayamohanan, K., A. K. Shukla y S. Sathyanarayana. "Kinetics of electrode reactions occurring on porous iron electrodes in alkaline media". Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 295, n.º 1-2 (noviembre de 1990): 59–70. http://dx.doi.org/10.1016/0022-0728(90)85005-p.

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Tang, Hongwei, Mengyue Liu, Lingna Kong, Xiaoyan Wang, Yue Lei, Xige Li, Yan Hou, Kun Chang y Zhaorong Chang. "The Synergistic Effect of MoS2 and NiS on the Electrical Properties of Iron Anodes for Ni-Fe Batteries". Nanomaterials 12, n.º 19 (4 de octubre de 2022): 3472. http://dx.doi.org/10.3390/nano12193472.

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In this paper, a series of Fe3O4/MoS2/NiS composite electrodes were synthesized by a simple coprecipitation method. The influence of different ratio additives (MoS2 and NiS) on the performance of iron anodes for Ni-Fe batteries was systematically investigated. In this paper, the mixed alkaline solution of 6 mol/L NaOH and 0.6 mol/L LiOH was used as electrolyte, and sintered Ni(OH)2 was used as counterelectrode. The experimental results show that the MoS2 and NiS additives can effectively eliminate the passivation phenomena in iron electrodes, reduce the electrode polarization, and increase the reversibility capacity. As a result, the Fe3O4/MoS2/NiS composite electrodes exhibit a high specific capacity, good rate performance, and long cycling stability. Especially, the Fe3O4/MoS2 (5%)/NiS (5%) electrode with a suitable ratio of additives can provide excellent electrochemical performance, with high discharge capacities of 657.9 mAh g−1, 639.8 mAh g−1, and 442.1 mAh g−1 at 600 mA g−1, 1200 mA g−1, and 2400 mA g−1, respectively. This electrode also exhibits good cycling stability.
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Černý, J. y K. Micka. "Voltammetric study of an iron electrode in alkaline electrolytes". Journal of Power Sources 25, n.º 2 (febrero de 1989): 111–22. http://dx.doi.org/10.1016/0378-7753(89)85003-7.

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Rajan, Aravamuthan Sundar, Srinivasan Sampath y Ashok Kumar Shukla. "An in situ carbon-grafted alkaline iron electrode for iron-based accumulators". Energy & Environmental Science 7, n.º 3 (2014): 1110. http://dx.doi.org/10.1039/c3ee42783h.

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Sun, Jianrui, Saisai Li, Qiaoqiao Zhang y Jingqi Guan. "Iron–cobalt–nickel trimetal phosphides as high-performance electrocatalysts for overall water splitting". Sustainable Energy & Fuels 4, n.º 9 (2020): 4531–37. http://dx.doi.org/10.1039/d0se00694g.

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Tesis sobre el tema "Alkaline Iron Electrode"

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Siong, Victor [Verfasser]. "Research and optimizations of iron composites as negative electrode materials for aqueous alkaline batteries / Victor Siong". Ulm : Universität Ulm, 2019. http://d-nb.info/1183099711/34.

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Bekka, Ahmed. "Etude cristallographique et magnétique de nouveaux ferrites de type [béta]" [A(y)B(n+)((1-y)/n)] (1+x) Zn (x) Fe(11-x) O17 (x [à peu près égal à] 0,9) avec A,B = Li, Na, K, Ag, Ca, Sr, Ba, Pb". Grenoble 1, 1986. http://www.theses.fr/1986GRE10138.

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Preparation sous forme de monocristaux et de polycristaux de na::(4,2) k::(1,8) fe::(30) me::(3) o::(51) (me = zn, mg, cu). Determination de la structure cristalline, et mesures de conductivite ionique, d'aimantation, determination des temperatures de curie et des constantes d'anisotropie magnetocristalline. Substitution partielle des cations na et k par li, na, k, ag, ca, sr, ba, pb. Caracterisation par diffraction rx, microscopie a balayage et a transmission
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Caignaert, Vincent. "Non-stoechiometrie par creation de lacunes anioniques : oxydes mixtes de manganese et de fer, de structure apparentee a la perovskite". Caen, 1986. http://www.theses.fr/1986CAEN2007.

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Etude des possibilites d'ecarts a la stoechiometrie sur le sous reseau anionique des perovskites amn::(1-x) fe::(x)o::(3-y) (a=ca, sr, ba) par diffraction x et neutron, microscopie electronique haute resolution, spectre moessbauer et mesures magnetiques. Caracterisation de plusieurs types d'ordre des lacunes oxygene en fonction du cation a et du taux de mn
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Boudouvas, Denis. "Effet du potassium sur un catalyseur composite Fe-Co-C en synthèse d'hydrocarbures". Grenoble INPG, 1989. http://www.theses.fr/1989INPG0092.

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Etude de la promotion par le potassium du catalyseur composite fe-co-c, c'est-a-dire de l'amelioration de son activite catalytique et de sa selectivite en alcenes. L'addition de potassium est realisee soit par impregnation par une solution aqueuse de k#2co#3, soit par la formation intermediaire d'un compose d'insertion avec le carbone de formule kc#3#2. L'evolution de la selectivite des catalyseurs promus et non promus par le potassium est etudiee a des conversions en monoxyde de carbone analogues a celles d'un procede industriel. Des tests catalytiques a faible conversion et des mesures de chimisorption de gaz reagissants sont effectues
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Libros sobre el tema "Alkaline Iron Electrode"

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Rayment, George E. y David J. Lyons. Soil Chemical Methods - Australasia. CSIRO Publishing, 2010. http://dx.doi.org/10.1071/9780643101364.

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Soil Chemical Methods – Australasia describes over 200 laboratory and field chemical tests relevant to Australasia and beyond. The information and methodology provided across 20 chapters is comprehensive, systematic, uniquely coded, up-to-date and designed to promote chemical measurement quality. There is guidance on the choice and application of analytical methods from soil sampling through to the reporting of results. In many cases, optional analytical ‘finishes’ are provided, such as flow-injection analysis, electro-chemistry, multiple flame technologies, and alternatives to chemical testing offered by near-range and mid-range infrared diffuse reflectance spectroscopy. The book supersedes and updates the soil chemical testing section of the 1992 Australian Laboratory Handbook of Soil and Water Chemical Methods of Rayment and Higginson, while retaining method codes and other strengths of that Handbook. Chapters cover soil sampling, sample preparation and moisture content; electrical conductivity and redox potential; soil pH; chloride; carbon; nitrogen; phosphorus; sulphur; gypsum; micronutrients; extractable iron, aluminium and silicon; saturation extracts; ion-exchange properties; lime requirements; total miscellaneous elements; miscellaneous extractable elements; alkaline earth carbonates and acid sulfate soils. In addition, there are informative Appendices, including information on the accuracy and precision of selected methods. This book targets practising analysts, laboratory managers, students, academics, researchers, consultants and advisors involved in the analysis, use and management of soils for fertility assessments, land use surveys, environmental studies and for natural resource management.
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Capítulos de libros sobre el tema "Alkaline Iron Electrode"

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Dandekar, Sneha, Kavita Pande y Dilip Peshwe. "Extraction of Boron from Tourmaline Ore: Mechanism of Thermal Analysis of the Schorl". En Pyrometallurgy - New Perspectives [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.111595.

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Tourmaline is the chief boron-bearing mineral on the earth and is present in an excess amount in the crustal rocks. However, schorl is an iron-rich alkali that forms a solid solution with the magnesium-rich, alkali tourmaline, dravite. In this work, tourmaline (schorl variety) was treated along with soda ash, and its behavior was analyzed using electron probe microanalysis (EPMA), x-ray diffraction (XRD), scanning electron microscope, and energy dispersive spectrometer (SEM-EDS) analyses, thermogravimetric analysis (TGA), differential thermal analysis (DTA), in order to annotate the soda-ash activation of boron within the tourmaline ore. To extract boron from the sample, sodium carbonate powder was mixed with the schorl in 20% of the total weight of schorl powder. When the sample was treated with sodium carbonate, the sodium gets combined with the boron to form sodium borate at 566°C along with aegirine and aluminum oxides. This sodium borate can be treated with hydrochloric acid to get boron-oxide along with NaCl.
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Golden, Teresa D., Jeerapan Tientong y Adel M. A. Mohamed. "Electrodeposition of Nickel-Molybdenum (Ni-Mo) Alloys for Corrosion Protection in Harsh Environments". En Research Perspectives on Functional Micro- and Nanoscale Coatings, 369–95. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0066-7.ch014.

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Electrodeposition of only molybdenum onto substrates is difficult, therefore molybdenum is typically deposited with iron-based alloys such as nickel. The deposition of such alloys is known as an induced codeposition mechanism. The electrodeposition of nickel-molybdenum alloys using alkaline plating solutions is covered in this chapter. The mechanism for deposition of nickel-molybdenum is reviewed, as well as the influence of the plating parameters on the coatings. Characterization of the coatings by scanning electron microscopy and x-ray diffraction is discussed and how deposition parameters affect morphology, composition, and crystallite size. Nickel-molybdenum alloys offer enhanced corrosion protection and mechanical properties as coatings onto various substrates. A survey of the resulting hardness and Young's modulus is presented for several research studies. Corrosion parameters for several studies are also compared and show the percentage of molybdenum in the coatings affects these values.
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Actas de conferencias sobre el tema "Alkaline Iron Electrode"

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K, Tarantseva, Korostelyova A, Polyanskova E y Tarantsev K. "Catalytic Activity of Copper Electrodes Coated with Nickel Foam, Iron and Cobalt Oxides and Hydroxides in Highly Alkaline Alcoholic Media". En 2023 Third International Conference on Advances in Electrical, Computing, Communication and Sustainable Technologies (ICAECT). IEEE, 2023. http://dx.doi.org/10.1109/icaect57570.2023.10117976.

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Ultarakova, А., N. Lokhova y A. Yessengaziyev. "Silica removal from waste of ilmenite concentrate pyrometallurgical processing". En Challenges of Science. Institute of Metallurgy and Ore Beneficiation, Satbayev University, 2021. http://dx.doi.org/10.31643/2021.12.

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The article presents the study results for alkaline leaching of fine ilmenite concentrate dusts from electric smelting. The physical and chemical properties of the dusts were studied using chemical and instrumental analysis methods. The dust composition was determined, X-ray phase analysis showed that the dust sample substance is in the X-ray amorphous state, iron is present in the trivalent state, and silicon is bound to magnesium. The dust sample study using a scanning electron microscope showed that part of the titanium is bound in a hard-to-disclose anasovite encapsulated in amorphous silicon oxide. The leaching study of electric smelting dust with sodium hydroxide solutions included the study of the effect of sodium hydroxide concentration, process duration, temperature, S: L ratio. The optimal conditions for dust leaching from electric smelting of ilmenite concentrate have been established: temperature 80-90 °C, duration 90-120 min, ratio S: L = 1: 5, the concentration of sodium hydroxide solution 110-115 g/dm3. The silicon extraction degree into the solution under these conditions was 77.7%. The behavior of accompanying components of chromium, zinc, iron, and manganese during dust leaching was also studied. X-ray phase analysis of the cake after leaching shows almost complete amorphization of the leached product, the main phase is a solid solution of Fe2O3·TiO2.
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