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Journal articles on the topic 'Cathodic reaction mechanism'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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1

Diao, Zhuo, Takaaki Imaizumi, Keita Mizuno, et al. "Investigation on Reaction Mechanism in an SOFC Composite Cathode by Using Patterned Thin Film Electrodes." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 176. http://dx.doi.org/10.1149/ma2023-0154176mtgabs.

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Introduction For the further commercial use of solid oxide fuel cells (SOFCs), operating at intermediate temperatures is demanded. When reducing the operating temperature, the degradation of cathodic activity occupies the largest part of degradation of cell performance. Therefore, to improve the performance of SOFCs at intermediate temperature, the activity of cathodic reaction has to be improved. The cathodic reaction of SOFCs proceeds not only at triple phase boundaries (TPBs) of electrode, electrolyte and gas but also at double phase boundaries (DPBs) of electrode and gas, when a mixed ioni
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2

Diao, Zhuo, Takaaki Imaizumi, Keita Mizuno, et al. "Investigation on Reaction Mechanism in an SOFC Composite Cathode by Using Patterned Thin Film Electrodes." ECS Transactions 111, no. 6 (2023): 1145–52. http://dx.doi.org/10.1149/11106.1145ecst.

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The reaction mechanism in an SOFC composite cathode was investigated by using patterned thin film model electrodes. In this work, we proposed new types of model electrodes, which could reproduce SOFCs cathodic reactions in a composite electrode of a mixed conducting electrode and an electrolyte. Then the model electrode was fabricated by choosing La0.6Sr0.4CoO3-δ (LSC) and Ce0.9Gd0.1O1.95 (GDC) as the electrode and the electrolyte, respectively. From the DC polarization measurements of the model electrode, it was found that making a composite of LSC and GDC can improve the cathodic performance
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3

Amezawa, Koji, Katsuya Nishidate, Zhuo Diao, et al. "(Invited) Mechanism of Cathodic Reaction in Proton-Conducting Ceramic Fuel Cells Investigated By Patterned Model Electrodes." ECS Meeting Abstracts MA2022-02, no. 47 (2022): 1737. http://dx.doi.org/10.1149/ma2022-02471737mtgabs.

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Proton-conducting ceramic fuel cell (PCFCs) is one type of solid oxide fuel cell using a solid-state proton-conductor, typically BaZrO3-based and BaCeO3-based ceramics, as an electrolyte. PCFC is expected to operate at intermediate temperatures with high energy conversion efficiency. One of technological challenges for realization of PCFC is the development of high performace cathode. Cathodic reaction in PCFC is electrochemical reduction of oxygen gas foriming water vapor. Since protons, electrons, and oxygen gas molcules exist in the electrolyte, electrode and gas phase, respectively, the el
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4

Li, Xia, Sixu Deng, and Xueliang Andy Sun. "(Digital Presentation) Understanding the Chemistry and Microstructure Evolution of Cathodic Interface in All-Solid-State Batteries." ECS Meeting Abstracts MA2022-01, no. 2 (2022): 236. http://dx.doi.org/10.1149/ma2022-012236mtgabs.

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All-solid-state lithium-ion batteries (SSLIBs) are promising candidates to meet the requirement of electric vehicles due to the intrinsic safety characteristics and high theoretical energy density. A stable cathodic interface is critical for maximizing the performance of SSLIBs. In our study, operando X-ray absorption near-edge spectroscopy (XANES) combined with transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) is employed to investigate the interfacial behavior between the Li-ion cathodes and sulfide solid-state electrolyte. Constructing a uniform interlayer
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Sunarya, Yayan. "3-Mercaptopropionic Acid as Corrosion Inhibitor for Carbon Steel in CO2 Aerated 1% NaCl Solution with Buffer Control-pH." Molekul 13, no. 2 (2018): 98. http://dx.doi.org/10.20884/1.jm.2018.13.2.340.

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In this research, 3-Mercaptopropionic acid (MPA) as corrosion inhibitor of carbon steel in CO2 aerated 1% NaCl solution with buffer pH adjustment has been studied by means of electrochemical impedance (EIS) and polarization (Tafel plot). MPA was found to be an effective carbon steel inhibitor. Percentage inhibition efficiency (IE %) calculated by both Tafel plot and EIS, ranged from 85% to 90%. MPA was found to affect the cathodic processes and act as cathodic-type inhibitors. Mechanism of inhibit corrosion by adsorption mechanism leads to the formation of a protective chemisorbed film on the
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6

ENDO, A. "Cathodic reaction mechanism for dense Sr-doped lanthanum manganite electrodes." Solid State Ionics 86-88 (July 1996): 1191–95. http://dx.doi.org/10.1016/0167-2738(96)00286-x.

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7

Ju, Hong, and Yan Li. "Coulostatic-Based Research on Corrosion Inhibition Mechanism of Three Inhibitors for Hot Dipped Coating Steels." Applied Mechanics and Materials 229-231 (November 2012): 87–90. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.87.

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The corrosion inhibition mechanism of three inhibitors for hot dipped coating steels in HCl acid was studied by coulostatic method. The results showed that the anodic Tafel slope ba and cathodic Tafel slope bc significantly increased with increasing of corrosion inhibitor concentration. While the corrosion current density Icorr decreases with the corrosion inhibition concentration increasing. And the inhibition efficiency increased with the inhibitor concentration. The inhibiting action of these compounds were attributed to blocking of the electrode surface by adsorption through its active cen
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8

Kuzminykh, Maria M., Victoria V. Panteleeva, and Anatoliy B. Shein. "CATHODIC HYDROGEN EVOLUTION ON IRON DISILICIDE. I. ALKALINE SOLUTION." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, no. 1 (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 irreversibl
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9

Tada, Eiji, Akiyoshi Saito, Takumi Kosaba, and Azusa Ooi. "Hydrogen Evolution Reaction Mechanism of Steel in Aqueous Solution Containing Thiocyanate Ions." ECS Meeting Abstracts MA2025-01, no. 20 (2025): 1360. https://doi.org/10.1149/ma2025-01201360mtgabs.

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The purpose of this study is to elucidate the effect of thiocyanate ions on the hydrogen evolution reaction on steel using electrochemical measurements. The material used in this study was cold-rolled steel sheet. The steel plate surface was polished with SiC waterproof abrasive paper up to JIS#2000 grit and then with diamond paste to 1 um. The steel surface was then ultrasonically cleaned with acetone and ultrapure water before being used for the experiments. Buffer solutions containing ammonium thiocyanate (NH4SCN) at different pH were used as test solutions. Electrochemical measurements wer
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10

Ambrosioni, Brice, Anthony Barthelemy, Dorin Bejan, and Nigel J. Bunce. "Electrochemical reduction of aqueous nitrate ion at tin cathodes." Canadian Journal of Chemistry 92, no. 3 (2014): 228–33. http://dx.doi.org/10.1139/cjc-2013-0406.

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The remediation of nitrate-contaminated water using electrochemical reduction at a tin cathode has previously been shown to give almost quantitative denitrification (removal of dissolved nitrogen species) under highly cathodic polarization. A particular focus of this project was to identify specific role(s) for tin in the reaction in the context of the previous literature. The current efficiency for denitrification was enhanced in alkaline solution, and the reaction was accelerated by the presence of small concentrations of Sn(II) salts, which are in a dynamic exchange between cathodic deposit
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11

Kuzminykh, Maria М., Viktoria V. Panteleeva, and Anatoliy B. Shein. "CATHODIC HYDROGEN EVOLUTION ON IRON DISILICIDE. II. ACIDIC SOLUTION." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, no. 2 (2019): 59–64. http://dx.doi.org/10.6060/ivkkt.20196202.5750.

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The kinetics of hydrogen evolution reaction on FeSi2-electrode in 0.5 M H2SO4 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 sulfuric acid solution proceeds along the discharge - electrochemical desorption route, where desorption is the rate-determining stage. Both stages are irrevers
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12

Iwase, Sadanobu, Shinsuke Inagi, and Toshio Fuchigami. "Cathodic generation of reactive (phenylthio)difluoromethyl species and its reactions: mechanistic aspects and synthetic applications." Beilstein Journal of Organic Chemistry 18 (July 20, 2022): 872–80. http://dx.doi.org/10.3762/bjoc.18.88.

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The cathodic reduction of bromodifluoromethyl phenyl sulfide (1) using o-phthalonitrile as a mediator generated the (phenylthio)difluoromethyl radical, which reacted with α-methylstyrene and 1,1-diphenylethylene to provide the corresponding adducts in moderate and high yields, respectively. In contrast, chemical reduction of 1 with SmI2 resulted in much lower product yields. The detailed reaction mechanism was clarified based on the cathodic reduction of 1 in the presence of deuterated acetonitrile, CD3CN.
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13

Perevezentseva, D. O., and E. V. Gorchakov. "Electrochemical Response of Gold Nanoparticles at a Graphite Electrode." Advanced Materials Research 1040 (September 2014): 297–302. http://dx.doi.org/10.4028/www.scientific.net/amr.1040.297.

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The electrochemical activity of gold nanoparticles at graphite electrodes by the method of cyclic voltammetry is studied. In this article the nature of the supporting electrolyte, modification time of graphite electrode by gold nanoparticles and the potential range on the value of the “inverse” cathodic peak are investigated. The “inverse” cathodic peak of gold nanoparticles formed in the reaction mixture HAuCl4:Na3C6H5O7:NaBH4=1:1:4 is observed on the cathodic branch of cyclic voltamperegram at Ec = 0.05 V at graphite electrode. The mechanism of stepwise electrochemical oxidation and reductio
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14

Czelej, Kamil, Karol Cwieka, Juan C. Colmenares, and Krzysztof J. Kurzydlowski. "Atomistic insight into the electrode reaction mechanism of the cathode in molten carbonate fuel cells." Journal of Materials Chemistry A 5, no. 26 (2017): 13763–68. http://dx.doi.org/10.1039/c7ta02011b.

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The O-terminated octopolar NiO(111) is predicted to facilitate cathodic transformation of CO<sub>2</sub> to CO<sub>3</sub><sup>2−</sup> through sequential Mars-van Krevelen and Eley-Rideal mechanisms.
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15

He, Xiang Zhu, Wen Jun Zhang, and Yong Xiu Wang. "Electrodepositon and Properties of Ni-Diamond Composite Coatings." Advanced Materials Research 702 (May 2013): 176–80. http://dx.doi.org/10.4028/www.scientific.net/amr.702.176.

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Ni-diamond composite coatings are conducted by electrodepositon. The crystal structure and surface morphology of the composite coatings were examined with X-ray diffraction (XRD) and scanning electron microscopy (SEM) and the mechanism of Ni-diamond co-deposition is conducted by catholic polarization and cyclic voltammetry method. The result reveals that diamond particles are successfully embed in Ni matrix and the coatings have an amorphous structure. Cyclic voltammetry indicate that nickel deposition process is an irreversible electrode reaction and cathode polarization curve shift towards p
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16

Garcia-Costa, Alicia L., Andre Savall, Juan A. Zazo, Jose A. Casas, and Karine Groenen Serrano. "On the Role of the Cathode for the Electro-Oxidation of Perfluorooctanoic Acid." Catalysts 10, no. 8 (2020): 902. http://dx.doi.org/10.3390/catal10080902.

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Perfluorooctanoic acid (PFOA), C7F15COOH, has been widely employed over the past fifty years, causing an environmental problem because of its dispersion and low biodegradability. Furthermore, the high stability of this molecule, conferred by the high strength of the C-F bond makes it very difficult to remove. In this work, electrochemical techniques are applied for PFOA degradation in order to study the influence of the cathode on defluorination. For this purpose, boron-doped diamond (BDD), Pt, Zr, and stainless steel have been tested as cathodes working with BDD anode at low electrolyte conce
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17

Wang, Shao Qing, Fa Qin Xie, Xiao Fei Yao, and Xiang Qing Wu. "Mechanism of Cathodic Plasma Electrolytic Deposition on Ti6Al4V Alloy in Al(NO3)3 Ethanol-Aqueous Solution." Advanced Materials Research 1145 (March 2018): 54–58. http://dx.doi.org/10.4028/www.scientific.net/amr.1145.54.

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Barrier layer was prepared by Micro-arc oxidation(MAO) technique in silicate solution, and cathodic plasma electrolytic deposition (CPED) technique was used to fabricate Al2O3 ceramic coatings on Ti6Al4V alloy in Al(NO3)3(30g/L) and ethanol-aqueous solutions. Surface morphology and elemental of the coatings were investigated by scanning electron microscope (SEM) and energy disperse spectroscopy (EDS). Reaction phenomena were recorded and products of reactions were analyzed by infrared absorption spectrum KBr compression method. Furthermore, mechanisms of different electrolytes were evaluated.
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18

Asmara, Yuli Panca. "Simulation of CO2 Corrosion of Carbon Steel in High Pressure and High Temperature Environment (HPHT)." Journal of Integrated and Advanced Engineering (JIAE) 2, no. 1 (2022): 63–70. http://dx.doi.org/10.51662/jiae.v2i1.41.

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In HPHT environments, the mechanism of CO2 corrosion faces a challenge as an effect of chemical-physical reactions on the metal surface. The presence of other elements in the CO2 system complicates corrosion behavior. To provide a realistic mechanism for corrosion process, some corrosion prediction models have developed software using fundamental theories such as electrochemical reactions and thermodynamics theories. Existing methods to predict corrosion rate models in HPHT environments have shown reasonable results. This paper reviews software of corrosion predictions which calculate corrosio
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19

Strebl, Michael P., Mark P. Bruns, and Sannakaisa Virtanen. "(Corrosion Division Morris Cohen Graduate Student Award) Respirometric Monitoring of Corrosion." ECS Meeting Abstracts MA2024-02, no. 15 (2024): 1641. https://doi.org/10.1149/ma2024-02151641mtgabs.

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Accurate measurement of the corrosion rate of metals and alloys under realistic exposure conditions is crucial for the elucidation of corrosion mechanisms, the development of new corrosion protection measures, and for reliable corrosion prediction. A respirometric approach to monitor corrosion rates based on quantifying the rates of the main cathodic reactions during corrosion is presented. With the proposed gravimetric, manometric, or flow cell experimental setups it is possible to follow the rates of the H2 evolution reaction (HER), the O2 reduction reaction (ORR), or both cathodic reactions
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20

Shein, Anatoly B., and Vladimir I. Kichigin. "The kinetics of the hydrogen evolution reaction on CeM2Ge2 (M = Fe, Co, Ni) electrodes in alkaline solutions." Вестник Пермского университета. Серия «Химия» = Bulletin of Perm University. CHEMISTRY 12, no. 3 (2022): 170–85. http://dx.doi.org/10.17072/2223-1838-2022-3-170-185.

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The kinetics of hydrogen evolution reaction on the intermetallic compounds CeM2Ge2 (M = Fe, Co, Ni) in 0.5–2.0 M KOH solutions were studied using polarization measurements and electrochemical impedance spectroscopy. For 1 M KOH, the Tafel constants vary in the intervals: а = 0.46–0.57 V; b = 0.082–0.096 V. The catalytic activity in the hydrogen evolution reaction increases in the sequence CeFe2Ge2 – CeNi2Ge2 – CeCo2Ge2. The cathodic process was shown to be the combination of the hydrogen evolution reaction and hydrogen absorption reaction; the reaction of H2 evolution proceeds through the Volm
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21

Sakaki, M., and T. Sakakibara. "Excitation, ionization, and reaction mechanism of a reactive cathodic arc deposition of TiN." IEEE Transactions on Plasma Science 22, no. 6 (1994): 1049–54. http://dx.doi.org/10.1109/27.370251.

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22

Zhou, JiaYu, Zili Li, JianGuo Liu, et al. "Effect of AC interference on hydrogen evolution reaction of x80 steel." Anti-Corrosion Methods and Materials 67, no. 2 (2020): 197–204. http://dx.doi.org/10.1108/acmm-11-2019-2216.

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Purpose The purpose of this paper is to quantify the influence of alternating current (AC) interference on hydrogen evolution reaction of X80 steel. Design/methodology/approach The hydrogen evolution potential was obtained by cathodic potentiodynamic polarization curve. The instantaneous potential under AC interference was obtained by high-frequency acquisition with three-electrode system. Electrochemical impedance spectroscopy and Tafel polarization curves were used to study the influence mechanism of AC interference on instantaneous potential. Findings It was concluded that the hydrogen evol
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23

Fang, Xiao Jun, Li Liu, Zhi Gang Yang, and Yong Qiang Zhang. "Corrosion Behavior and Mechanism of Oil Casing Steel in CO2 Salt Solution." Materials Science Forum 1035 (June 22, 2021): 534–38. http://dx.doi.org/10.4028/www.scientific.net/msf.1035.534.

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The influence of temperature, flow rate, PH value, and oxygen content on the corrosion law in the carbon dioxide salt solution of J55 oil casing was investigated by the corrosion weight loss method. The results showed that with the increase of temperature, the corrosion rate of J55 steel first increased and then decreased and the corrosion rate reached the maximum at 100°C. The corrosion rate was closely related to the formation of corrosion products. The increase of the flow rate speeded up the transfer rate of the corrosive medium to the metal surface and hindered the formation of FeCO3 on t
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24

Miskovic-Stankovic, Vesna. "The mechanism of cathodic electrodeposition of epoxy coatings and the corrosion behaviour of the electrodeposited coatings." Journal of the Serbian Chemical Society 67, no. 5 (2002): 305–24. http://dx.doi.org/10.2298/jsc0205305m.

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The model of organic film growth on a cathode during electrodeposition process proposes the current density-time and film thickness-time relationships and enables the evaluation of the rate contents for the electrochemical reaction of OH? ion evolution and for the chemical reaction of organic film deposition. The dependencies of film thickness and rate constants on the applied voltage, bath temperature and resin concentration in the electrodeposition bath have also been obtained. The deposition parameters have a great effect on the cathodic electrodeposition process and on the protective prope
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25

Angelin Thangakani J, Johnson Raja S, and Afrose H. "Corrosion inhibition of mild carbon steel in well water medium L-TRYPTOPHAN - Zn2+ System." Kongunadu Research Journal 11, no. 2 (2024): 21–33. https://doi.org/10.26524/krj.2024.11.

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The environmentally friendly inhibitor system, L-Tryptophan-Zn2+, was investigated using the weight loss method. A synergistic effect was observed between L-Tryptophan and Zn2+ system. The formulation comprising 250 ppm of L-Serine and 50 ppm of Zn2+ demonstrated an impressive inhibition efficiency of 91%. UV-Visible spectroscopy revealed the formation of a protective film on the metal surface. FTIR analysis suggested that the Zn2+-L-Tryptophan complex formed at the anodic sites of the metal surface, which inhibited the anodic reaction, while Zn(OH)2 formed at the cathodic sites, controlling t
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26

Malapit, Christian. "Electrosynthesis for the Invention of New Organic Reactions." ECS Meeting Abstracts MA2024-02, no. 53 (2024): 3641. https://doi.org/10.1149/ma2024-02533641mtgabs.

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Electrosynthesis has emerged as a versatile and powerful tool in organic chemistry, facilitating the discovery and advancement of novel organic reactions. By harnessing electricity, this cutting-edge method generates reactive intermediates, driving chemical transformations to produce intricate organic compounds. This talk will present significant breakthroughs from our research group, showcasing the innovative use of electrochemistry in uncovering transformative reactions. Highlighted discoveries include (a) a site-selective arene C–H functionalization reaction, utilizing nitrogen radical inte
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27

Nesic, Srdjan, Negar Moradighadi, Huiru Wang, et al. "Combined EIS/Tof/SIMS Investigation of Iron Dissolution Mechanisms in CO2 Saturated Chloride Solutions." ECS Meeting Abstracts MA2024-02, no. 27 (2024): 2108. https://doi.org/10.1149/ma2024-02272108mtgabs.

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Aqueous corrosion of mild steel is one of the major problems in the oil and gas industry. The current understanding of corrosion mechanisms, mainly focused to the cathodic reaction, was used to build electrochemical models to predict the corrosion rate of mild steel. However, the effect of aqueous CO2 on the anodic iron dissolution reaction was less studied. In contrast, the mechanism of iron dissolution in strong acidic environments has been thoroughly investigated over many decades. Among the proposed mechanisms in the literature, a broadly applicable multi-path mechanism was identified that
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28

Ranka, Karnamohit, Richard Kang, Prabhat Prakash, et al. "Modeling Stochastic Kinetics of Cathodic Cu Surface Corrosion and Ionic Interaction in Nanoscopic Water Pools." ECS Meeting Abstracts MA2024-01, no. 47 (2024): 2616. http://dx.doi.org/10.1149/ma2024-01472616mtgabs.

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Cathodic Cu corrosion has been reported to occur in both the presence and absence of carbon dioxide in aqueous electrolytes and while the mechanism is not understood well it implies carbide-, hydride- and hydroxide-formation mediated pathways. Corrosion leads to roughening, which creates local pockets of electrolyte that are somewhat disconnected from the bulk. In this talk, we describe a combination of theoretical studies to identify reaction pathways, and kinetics modeling of them to obtain a working description of corrosion in water. Corrosion at metal surfaces is both influenced by and inf
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29

Endo, A. "Cathodic reaction mechanism of dense La0.6Sr0.4CoO3 and La0.81Sr0.09MnO3 electrodes for solid oxide fuel cells." Solid State Ionics 135, no. 1-4 (2000): 353–58. http://dx.doi.org/10.1016/s0167-2738(00)00466-5.

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30

Koizumi, Toshio, Toshio Fuchigami, Zaghloul El-Shahat Kandeel, Norio Sato, and Tsutomu Nonaka. "Reaction Mechanism of Cathodic Crossed Coupling of Acetone with Unsaturated Compounds in Acidic Solution." Bulletin of the Chemical Society of Japan 59, no. 3 (1986): 757–62. http://dx.doi.org/10.1246/bcsj.59.757.

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31

Kichigin, Vladimir I., and Anatoliy B. Shein. "The kinetics of the hydrogen evolution reaction on LnNi2Ge2 (Ln = lanthanide) electrodes in alkaline solution." Вестник Пермского университета. Серия «Химия» = Bulletin of Perm University. CHEMISTRY 13, no. 2 (2023): 92–100. http://dx.doi.org/10.17072/2223-1838-2023-2-92-100.

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The kinetics of hydrogen evolution reaction on the intermetallic compounds LnNi2Ge2 (Ln = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Lu) in 1 M KOH solution were studied using polarization measurements and electrochemical impedance spectroscopy. The Tafel constants vary in the intervals: а = 0.475–0.52 V; b = 0.070–0.078 V. The cathodic process was shown to be the combination of the hydrogen evolution reaction and hydrogen absorption reaction; the reaction of H2 evolution proceeds through the Volmer – Heyrovsky mechanism with the rate-determining Heyrovsky reaction. The values of the rate constants o
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32

Han, Yu Mei, and X. Grant Chen. "Corrosion Characteristics of Al-B4C Metal Matrix Composites in Boric Acid Solution." Materials Science Forum 877 (November 2016): 530–36. http://dx.doi.org/10.4028/www.scientific.net/msf.877.530.

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The corrosion behavior of Al-B4C metal matrix composites in H3BO3 solutions with different Cl- contents was investigated using potentiodynamic polarization and zero resistance ammetry techniques. Results show that the corrosion of Al-B4C composites in H3BO3 solution increases with increasing B4C volume fraction in the composites. The main corrosion characteristic of Al-B4C composites in H3BO3 solution is the galvanic corrosion between Al matrix and B4C particles. In the galvanic couple, B4C particle acts as cathode and Al matrix acts as anode. The cathodic reaction is hydrogen revolution react
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33

Joseph, Rosaline Vimala, Vimala S., Nivetha. S., Devadharshini Amala., A Stella Bharathy.M, and Agila. A. "Adhutodavasica nees leaf extract as corrosion inhibitorfor mild steel in acid medium." Zastita Materijala 66, no. 2 (2025): 429–39. https://doi.org/10.62638/zasmat1219.

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Sustainable corrosion control methods have emerged due to stringent environmental laws and growing ecological awareness. This study explores the inhibition efficiency of Adhatoda vasica Nees ethanolic leaf extract on mild steel corrosion in HCl. Using data from mass-loss methods, potentiodynamic polarization, AC impedance, UV-visible spectra, FTIR, and SEM analyses, the corrosion inhibition mechanism was evaluated. The extract achieved a maximum inhibition efficiency of 79.72% at 95 ppm, with no significant improvement beyond this concentration. The adsorption activation energy was 36.6275 kJ/
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34

POLKOVNIKOV, I. S., V. V. PANTELEEVA, and A. B. SHEIN. "CATHODIC EVOLUTION OF HYDROGEN ON IRON DISILICIDE IN ALKALINE ELECTROLYTE." Chemistry for Sustainable Development 31, no. 3 (2023): 324–30. http://dx.doi.org/10.15372/csd2023473.

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The kinetics and mechanism of hydrogen evolution on the FeSi2 electrode in 0.25-1.0 M NaOH solutions have been studied by polarisation and impedance measurements. The cathodic polarisation curves of iron disilicide in the studied solutions are characterized by a Tafel region with constants α and β equal to (-0.78)-(-0.72) and (-0.133)-(-0.128) V, respectively. The impedance spectra of FeSi2 at the potentials of the Tafel region represent a capacitive semicircle with a displaced centre, which corresponds to an asymmetric maximum in the graph of phase angle dependence on the logarithm of the alt
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35

Sarkar, N. K., and J. R. Park. "Mechanism of Improved Corrosion Resistance of Zn-containing Dental Amalgams." Journal of Dental Research 67, no. 10 (1988): 1312–15. http://dx.doi.org/10.1177/00220345880670101301.

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The aim of this study was to determine the mechanism of improved corrosion resistance of Zn-containing dental amalgams. Two Zn-containing conventional amalgams, their Zn-free counterparts, and three experimental amalgams (SnHg, ZnHg, and SnZnHg) were evaluated by the potentiodynamic polarization technique in 1% NaCl solution. The main difference between the two types of amalgams was found in their respective breakdown potentials at which passivity was destroyed. The breakdown potential of Zn-containing amalgams was about 200 mV more positive than that of the Zn-free amalgams. The improved stab
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Sdanghi, G., L. Yefsah, F. Mauvy та ін. "Reaction Mechanisms of La2NiO4+δ Oxygen Electrodes Operated in Electrolysis and Fuel Cell Mode". Journal of The Electrochemical Society 169, № 3 (2022): 034518. http://dx.doi.org/10.1149/1945-7111/ac58c3.

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The reaction mechanisms governing the electrochemical behavior of La2NiO4+δ (LNO) oxygen electrodes for Solid Oxide Cells have been investigated through a coupled experimental and modeling approach. In this frame, a set of experiments was performed on a symmetrical cell using a three-electrode setup. A micro-scale electrode model considering two reaction pathways, i.e. bulk and surface paths, has been developed to describe the experimental results. The microstructural parameters of the electrode were obtained by FIB-SEM tomography. The model was calibrated using the experimental polarization c
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37

Dean, Sheldon W., Richard Derby, and Glenn T. Von Dem Buzssche. "Inhibitor Types." Materials Performance 57, no. 4 (2018): 32–37. https://doi.org/10.5006/mp2018_57_4-32.

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Four major categories of corrosion inhibitors have been identified, based on the mechanism of operation, including barrier layer formers, neutralizers, scavengers, and miscellaneous types. The barrier formers have been further classified into oxidizers, adsorbed layer formers, and conversion layer formers. The barrier layer formers are generally effective in reducing both the cathodic and anodic reaction rates except for the oxidizing inhibitors which rely upon driving the metal potential in the positive (oxidizing) direction to take advantage of a passive layer which is stable at higher poten
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38

Ye, Xiatong, Hongyi Li, Norihiko L. Okamoto, and Tetsu Ichitsubo. "Design Guidelines for Cathode/Electrolyte Interface of Room-Temperature Rechargeable Magnesium Batteries with MnO2 Cathodes." ECS Meeting Abstracts MA2024-02, no. 9 (2024): 1436. https://doi.org/10.1149/ma2024-0291436mtgabs.

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Rechargeable magnesium batteries (RMBs) are strong candidates for large-scale energy storage systems due to their high theoretical energy density, high safety, and low production costs. However, the sluggish solid-state diffusion of Mg2+ in cathode materials and surface passivation of Mg metal anode in organic electrolytes are the main reasons for the stagnant development of RMBs. Since 2015, we have first reported the reversible Mg2+ insertion in a series of oxide cathode materials (MgCo2O4, etc.) at 150 ℃.[1] To explore suitable host structures at room temperature (RT), we have been comprehe
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39

Birss, V. I., C. Bock, and H. Elzanowska. "Hydrous Ir oxide films: the mechanism of the anodic prepeak reaction." Canadian Journal of Chemistry 75, no. 11 (1997): 1687–93. http://dx.doi.org/10.1139/v97-601.

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The origin and significance of the anodic prepeak (peak A0), seen in cyclic voltammetric studies of hydrous Ir oxide films in acidic solution just prior to the large Ir(III)/(IV) redox peaks (A1/C1), has been examined in this work. By also studying only very thin films, a corresponding cathodic feature (peak C0) has also been identified. The pH dependence of the A0/C0 peaks, assumed to also depict the Ir(III)/(IV) process, has been examined in sulfuric acid solutions, indicating that a ca. −80 mV shift per pH unit applies to this reaction. By also taking into consideration the measured in situ
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40

Liu, Pingli, Yanhua Zhu, and Liqiang Zhao. "New corrosion inhibitor for 13Cr stainless steel in 20% HCl solution." Anti-Corrosion Methods and Materials 67, no. 6 (2020): 557–64. http://dx.doi.org/10.1108/acmm-12-2019-2228.

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Purpose A novel compound was synthesized by cyclohexylamine, acetophenone and cinnamaldehyde through Mannich reaction in laboratory to use as corrosion inhibitor for steel in acidification process. Design/methodology/approach The corrosion and inhibition of 13Cr stainless steel in conventional acidification solution were investigated by electrochemical measurements and soaking experiments. The corrosion appearance was observed with scanning electron microscope on the whole surface of 13Cr stainless steel in 20% HCl solution, and the protection film was confirmed on the surface in presence with
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41

Krebs, Moritz Lukas, and Ferdi Schüth. "Electrochemical Production of Nitrite and Nitrate via Cathodic Oxygen Activation in Liquefied Ammonia." ECS Meeting Abstracts MA2024-02, no. 56 (2024): 3767. https://doi.org/10.1149/ma2024-02563767mtgabs.

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Nitrite and nitrate play pivotal roles in industrial applications, being utilized in the synthesis of pharmaceuticals, nylon precursors, explosives, and especially as fertilizer compounds. However, their synthesis primarily relies on the energy-intensive Ostwald process, which operates at high temperatures. Recently, there has been growing interest in producing nitrite and nitrate through the electrooxidation of ammonia. This method shows promise for enabling decentralized small-scale production under mild conditions while directly utilizing renewable energy sources.[1] However, production is
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42

Lang, Kamil, Jiří Vondrák, and Dana M. Wagnerová. "Interaction of Mn(III)Tetraphenylporphyrin with Superoxide; The Reaction Mechanism and Evidence for a Peroxo Complex." Collection of Czechoslovak Chemical Communications 59, no. 5 (1994): 1059–65. http://dx.doi.org/10.1135/cccc19941059.

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Cathodic one-electron reduction of Mn(III)TPP and O2 in an aprotic solvent yields Mn(II)TPP and the superoxide anion radical O2-. The Mn(II)TPP and O2- react in solution to the side-on peroxo complex Mn(III)TPP-O22-, which is oxidized at the electrode at a peak potential of Epa = 0.40 V vs NHE (k ≈ 104 dm3 mol-1 s-1). The rate-determining step of the overall two-electron oxidation is the transfer of the first electron coupled with a structure rearrangement of the peroxo complex to a superoxo complex.
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43

Kahyarian, Aria, Bruce Brown, and Srdjan Nešić. "The Unified Mechanism of Corrosion in Aqueous Weak Acids Solutions: A Review of the Recent Developments in Mechanistic Understandings of Mild Steel Corrosion in the Presence of Carboxylic Acids, Carbon Dioxide, and Hydrogen Sulfide." Corrosion 76, no. 3 (2020): 268–78. http://dx.doi.org/10.5006/3474.

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The recent developments in mechanistic understandings of mild steel corrosion in the presence of carboxylic acids, carbon dioxide, and hydrogen sulfide, when place side by side, reveal a simple, universal mechanism despite all the differences conventionally presumed for these corroding systems. These findings are recast into a generic mechanistic view of corrosion in aqueous weak acid solutions herein. In this mechanism, the buffering effect resulting from the chemical dissociation reaction inside the boundary layer, is highlighted as an inherent property of all weak acids. The validity of thi
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44

Mukerjee, Sanjeev, Kevin Yang, Ian Kendrick, and Ariel Friedman. "(Invited) Engendering Non-Noble Metal Catalysts for Electrolyzers: From Fundamentals to Devices." ECS Meeting Abstracts MA2024-01, no. 1 (2024): 27. http://dx.doi.org/10.1149/ma2024-01127mtgabs.

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In memory of Prof. Sri Narayanan, this presentation will showcase the electrocatalysis of hydrogen evolution reaction (HER) and oxygen reduction in the context of oxygen depolarization cathode (ODC) for electrolyzer applications. Fundamentals of HER/HOR in alkaline pH will be presented in the context of various theories proposed to rationalize pH, cations, and structure effects. It will be shown that none of them can effectively explain all observations. In this presentation, four schools of thought for HER/HOR will be discussed, focusing on the strengths and shortcomings of each hypothesis an
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45

McEvoy, Todd M., and Keith J. Stevenson. "Elucidation of the electrodeposition mechanism of molybdenum oxide from iso- and peroxo-polymolybdate solutions." Journal of Materials Research 19, no. 2 (2004): 429–38. http://dx.doi.org/10.1557/jmr.2004.19.2.429.

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The cathodic electrodeposition of molybdenum oxide thin films prepared from aqueous solutions containing iso-polymolybdates and peroxo-polymolybdates is described. Chronocoulometry, x-ray photoelectron spectroscopy, spectroelectrochemistry, and electrochemical quartz crystal microgravimetry were used to establish corresponding reaction mechanisms for films grown at different deposition potentials. Electrodeposition from acidified iso-polymolybdate solutions proceeds by the reduction of molybdic acid, whereas deposition from aqueous peroxo-based solutions involves the graded reduction of severa
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46

Takenaka, T., H. Okada, R. Shimokawa, and T. Morishige. "Influence of bath composition on Ti metal deposition in molten CaCl2 containing calcium titanate." MATEC Web of Conferences 321 (2020): 07010. http://dx.doi.org/10.1051/matecconf/202032107010.

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The dependence of the cathodic behavior of a Ti ion on the molar ratio of CaO to TiO2 (RCaO/TiO2) was investigated in molten CaCl2 above 1373 K, and the influence of RCaO/TiO2 on Ti metal deposition was discussed. The reduction mechanism changed at RCaO/TiO2 = 1.5; a three-step reduction of Ti was suggested in the melt of RCaO/TiO2 &lt; 1.5, while a two-step reduction seemed to occur above RCaO/TiO2 = 1.5. Titanium metal deposition was also affected by RCaO/TiO2 as well as by the cathode potential, and the suitable RCaO/TiO2 was likely 1.5. Since this value was the same as the suitable value i
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47

García, M. A., F. Ginez, and S. A. Gamboa. "Oxygen Reduction Reaction on Pt-ZrO2/C during the Alcohol Crossover in Experimental Direct Alcohol Fuel Cells." Journal of New Materials for Electrochemical Systems 21, no. 1 (2018): 057–62. http://dx.doi.org/10.14447/jnmes.v21i1.524.

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Pt–ZrO2/C composite was synthesized by chemical reduction process. ZrO2 precursor was obtained by sol-gel at room temperature. The synthesis allowed the formation of Pt-ZrO2/C nanoparticles. The nanoparticles were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and transmission electron microscopy (TEM) techniques. The electrochemical experiments were carried out for investigating the electro-catalytic properties of the synthesized composite to promote the cathodic reaction in direct alcohol fuel cells (DAFC). The results indicated that Pt-ZrO2/C showed more tolerance th
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48

Sainis, Salil, and Caterina Zanella. "A Study of the Localized Ceria Coating Deposition on Fe-Rich Intermetallics in an AlSiFe Cast Alloy." Materials 14, no. 11 (2021): 3058. http://dx.doi.org/10.3390/ma14113058.

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Corrosion inhibiting conversion coating formation is triggered by the activity of micro-galvanic couples in the microstructure and subsequent local increase in pH at cathodic sites, which in the case of aluminium alloys are usually intermetallics. Ceria coatings are formed spontaneously upon immersion of aluminium alloys in a cerium conversion coating solution, the high pH gradient in the vicinity of intermetallics drives the local precipitation of ceria conversion compounds. Cu-rich intermetallics demonstrate a highly cathodic nature and have shown the local precipitation reaction to occur re
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49

Takara, Yuya, and Takahiro Ozawa. "Application of Scanning Probe Microscopy Towards Clarifying the Mechanism of Localized Corrosion." ECS Meeting Abstracts MA2024-02, no. 15 (2024): 1628. https://doi.org/10.1149/ma2024-02151628mtgabs.

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Aluminum alloys are applied to transportation equipment due to their lightweight and excellent mechanical properties, making a significant contribution to reducing CO2 emissions. In the material structure, intermetallic compounds, such as μm-order or nm-order precipitates, are formed by unavidable impurities or components added for the purpose of improving mechanical properties. On the other hand, these precipitates cause localized corrosion around themselves, which lead to the formation of large pits. Localized corrosion is well known to be caused through a mechanism where potential differenc
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50

Wu, Donghai, Yuexian Li, Guanghua Lu, Qiuhong Lin, Lei Wei, and Pei Zhang. "Removal of Aqueous Para-Aminobenzoic Acid Using a Compartmental Electro-Peroxone Process." Water 13, no. 21 (2021): 2961. http://dx.doi.org/10.3390/w13212961.

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The presence of emerging contaminant para-aminobenzoic acid (PABA) in the aquatic environment or drinking water has the potential to harm the aquatic ecosystem and human health. In this work, the removal of aqueous PABA by a compartmental electro-peroxone (E-peroxone) process was systematically investigated from the kinetic and mechanism viewpoints. The results suggest that single electrolysis or ozonation was inefficient in PABA elimination, and the combined E-peroxone yielded synergistic target pollutant degradation. Compared to the conventional E-peroxone oxidation, the sequential cathodic
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