Log in

Relevant bibliographies by topics / Rotating Electrode / Journal articles

To see the other types of publications on this topic, follow the link: Rotating Electrode.

Journal articles on the topic 'Rotating Electrode'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Rotating Electrode.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Liu, Yong, Xiaodong Xu, Chunsheng Guo, and Huanghai Kong. "Analysis on Machining Performance of Nickel-Base Superalloy by Electrochemical Micro-milling with High-Speed Spiral Electrode." Micromachines 10, no. 7 (July 16, 2019): 476. http://dx.doi.org/10.3390/mi10070476.

Full text

Abstract:

As one of the most promising micro-machining methods, electrochemical micro-machining is widely used in the field of metal micro-structures. The electrochemical micro-milling on Nickel-base superalloy by using high-speed spiral electrode was studied in detail. Firstly, the electric field and flow field models of micro-electrochemical milling are established and analyzed by the finite element method. Then, the milling profile was predicted and the effect of high-speed rotation of electrodes on electrolyte promotion and secondary electrolysis prevention were analyzed. Secondly, the influence of the main machining parameters, such as rotating speed, electrical parameters, and feed rate on machining precision and efficiency was analyzed experimentally. Finally, by optimizing the machining parameters, a series of micro-graphic structures with a width of about 150 μm were obtained on Nickel-base superalloy 718 by using the spiral electrode with a diameter of 100 μm. The experimental and simulation results show that the high-speed rotation of electrodes can greatly improve the machining efficiency and stability. It was proved that micro-electrochemical milling with the high-speed rotating electrode technique is an effective method for machining micro-metal parts.

APA, Harvard, Vancouver, ISO, and other styles

2

Zdunek, A. D., and J. R. Selman. "A Novel Rotating Disk Electrode Cell Design: The Inverted Rotating Disk Electrode." Journal of The Electrochemical Society 139, no. 9 (September 1, 1992): 2549–51. http://dx.doi.org/10.1149/1.2221261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Goiogana, Manu, and Ahmed Elkaseer. "Self-Flushing in EDM Drilling of Ti6Al4V Using Rotating Shaped Electrodes." Materials 12, no. 6 (March 26, 2019): 989. http://dx.doi.org/10.3390/ma12060989.

Full text

Abstract:

This article reports an experimental investigation of the efficacy of self-flushing in the Electrical Discharge Machining (EDM) process in terms of tool wear rate (TWR), hole taper angle and material removal rate (MRR). In addition to a plain cylindrical shape, electrodes of different cross sections (slotted cylindrical, sharp-cornered triangular, round-cornered triangular, sharp-cornered square, round-cornered square, sharp-cornered hexagonal and round-cornered hexagonal) were designed as a means of inducing debris egress and then fabricated in graphite. EDM drilling trials using the rotating shaped electrodes were carried out on a Ti6Al4V workpiece. The results revealed that, although a low TWR and minimum hole taper angle were achieved using a plain cylindrical electrode, the usage of rotating shaped electrodes provided self-flushing of the dielectric fluid during the EDM process, which led to an improvement in MRR compared to that achieved with a plain cylindrical electrode. Besides, in general, the electrodes with rounded corners are associated with a lower TWR, a lower hole taper angle and a higher MRR when compared to the electrodes with sharp corners. Considering these results, it was concluded that different process attributes, i.e., TWR, hole taper angle and MRR, are all greatly affected by the electrode shape, and thus, the proper selection of the electrode shape is a precondition to attain a specific response from the EDM process.

APA, Harvard, Vancouver, ISO, and other styles

4

Xiong, Qiuju, Huali Wang, Xueliang Wang, Shihui Deng, Yong Liu, and Zhen Lv. "Experimental Investigation on Rotating Electrochemical Etching of a Micro Spiral Cylindrical Electrode." Micromachines 10, no. 10 (October 16, 2019): 704. http://dx.doi.org/10.3390/mi10100704.

Full text

Abstract:

To realize the electrochemical etching of a micro spiral cylindrical electrode, a new method of rotating electrochemical etching is proposed, and its process is further studied. First, according to the electrochemical etching principle, the machining mechanism of rotating electrochemical etching of a micro spiral cylindrical electrode is introduced. Second, based on the spiral vortex theory in the Taylor-Couette system, the effect of the high-speed rotating cylindrical microelectrode on its external flow field is analyzed. Third, the effects of rotation direction, rotation speed, machining voltage, and machining time on the thread structure are analyzed by experiments. Finally, a spiral cylindrical microelectrode with good surface thread shape is fabricated within two minutes by using the optimized machining parameters. It is proved that the rotating electrochemical etching method is an easy way to fabricate a micro spiral cylindrical electrode with high efficiency and low cost.

APA, Harvard, Vancouver, ISO, and other styles

5

Pinheiro, Jose Paulo, Luciana S. Rocha, Danielle Goveia, and Raewyn M. Town. "Scanned stripping chronopotentiometry at bismuth film rotating disc electrodes: a method for quantitative dynamic metal speciation." Environmental Chemistry 11, no. 2 (2014): 150. http://dx.doi.org/10.1071/en13147.

Full text

Abstract:

Environmental context Electroanalytical methods have found wide application in trace metal speciation analysis in environmental systems. The need to find functional alternatives to mercury electrodes for in situ speciation studies has encouraged the use of bismuth as a solid-state electrode substrate. We demonstrate the utility of bismuth electrodes for quantitative dynamic speciation analysis. Abstract Bismuth film electrodes are employed for dynamic metal speciation analysis of PbII complexes by stripping chronopotentiometry at scanned deposition potential (SSCP). Their performance is found to be comparable to that of mercury-film electrodes. The quantitative SSCP expressions that describe the thermodynamic and kinetic complexation parameters are straightforwardly applicable to this solid electrode.

APA, Harvard, Vancouver, ISO, and other styles

6

Araminaitė, Rūta, Rasa Garjonytė, and Albertas Malinauskas. "Rotating disk electrode study of electrocatalytic oxidation of ascorbate at Prussian blue modified electrode." Open Chemistry 7, no. 4 (December 1, 2009): 739–44. http://dx.doi.org/10.2478/s11532-009-0061-8.

Full text

Abstract:

AbstractElectrooxidation of ascorbate has been studied with the use of a rotating disk electrode. The results obtained show an efficient electrocatalytic oxidation of ascorbate at the Prussian blue (PB) modified electrode to proceed in solutions of pH 5.5 and 7.3. Depending on solution pH, the onset potential for ascorbate electrooxidation at PB modified electrode appears shifted by 0.1–0.2 V to lower values, as compared to an unmodified glassy carbon electrode. Within the electrode potential window of 0.3 to 0.5 V vs. Ag/AgCl, and electrode rotation velocity of 50–2000 rpm, the catalytic current obeys Koutecky-Levich equation at a submillimolar ascorbate concentration. Kinetic current densities, obtained from the data treatment, are higher for a pH 5.5 solution, and also at higher electrode potential.

APA, Harvard, Vancouver, ISO, and other styles

7

Kolmakov, Konstantin M., and Alexander E. Zverovshchikov. "Technology for Producing Fine Tungsten Carbide Powders." Materials Science Forum 1037 (July 6, 2021): 111–18. http://dx.doi.org/10.4028/www.scientific.net/msf.1037.111.

Full text

Abstract:

The article shows the advantage of electric arc synthesis and subsequent centrifugal spraying of tungsten carbide to obtain a high-quality highly dispersed powder. A tungsten electrode (anode) is fed to the surface of a rotating graphite electrode (cathode) until an electric arc occurs between the electrodes, and the cathode is made in the form of a ring. The angular speed of rotation of the annular graphite electrode is set in accordance with the calculated ratio, which provides fine-dispersed centrifugal atomization of the molten product particles. To prevent intense evaporation of tungsten and the formation of an excessive amount of fine particles, the power of the electric arc for melting the anode is limited to a set value.As a result, the uniformity of the powder increases and the dispersion of the particles of the main fraction decreases.

APA, Harvard, Vancouver, ISO, and other styles

8

Nemtoi, Gh, Ig Cretescu, Iuliana Breaban, P. C. Verestiuc, and Oana-Maria Tucaliuc. "Voltammetric characterization of Hg2+ ion behaviour in acid media on different electrodes." Acta Chemica Iasi 22, no. 2 (December 1, 2014): 135–44. http://dx.doi.org/10.2478/achi-2014-0011.

Full text

Abstract:

Abstract This article presents some aspects related to the cathodic discharge of the mercuric ion provided from HgCl2 into an aqueous solution of 0.1 M H2SO4 on different types of electrodes: gold disc electrode (GDE), carbon paste electrode (CPE) and platinum-disk electrode (PDE). Using the rotating disk electrode technique applied on PDE it was established that the cathodic discharge mechanism for the mercuric ion is based on both process types: mass transport, achieved by diffusion and charge transfer, achieved by electron transfer from cathode to mercury ion

APA, Harvard, Vancouver, ISO, and other styles

9

Cheggou, Rabi, N. Gabouze, and A. Kadoun. "Effect of the Electrode Geometry on the Diffusion-Current Problem of the Rotating Porous Silicon Electrode in HF Solution." Materials Science Forum 609 (January 2009): 149–54. http://dx.doi.org/10.4028/www.scientific.net/msf.609.149.

Full text

Abstract:

The basic voltammetric data of silicon/ fluoride-electrolyte interfaces available in the literature appear to be rather divers because of the large number of experimental parameters like semiconductor type, crystallographic orientation, fluoride acid concentration CF, pH and electrode rotation rate. In the present work we have studied the effects of parameters such as electrode rotating rate upon the voltammograms in order to show the electrode geometry effects on current transport through Si/HF interface. The decrease of the current experimentally observed after the initial current peak (Si/HF current-potential curve) is investigated. The origin of this behaviour lies in substitution of Si-H surface bond by SiO2 in the first seconds following the potential jump. The diffusion current problem of a rotating porous silicon electrode has been analysed based on the mass transfer equations for partially blocked electrode. The blocking parameter is calculated.

APA, Harvard, Vancouver, ISO, and other styles

10

Akagami, Y., K. Asari, B. Jeyadevan, T. Fujita, and N. Umehara. "ER Fluid Finishing Using Rotating Electrode." Journal of Intelligent Material Systems and Structures 10, no. 9 (September 1999): 753–56. http://dx.doi.org/10.1106/g4qq-16g6-cklr-xwuc.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Maksimenko, V. G. "Rotating Electrode in Electric-Field Sensor." Journal of Communications Technology and Electronics 66, no. 5 (May 2021): 561–66. http://dx.doi.org/10.1134/s1064226921040070.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Cieplak, Tomasz, Chobei Yamabe, Satoshi Ihara, Saburoh Satoh, Joanna Pawlat, Joanna Cieplak, and Iwo Polio. "Ozone Generation Using Plate Rotating Electrode Ozonizer- Effect Of Electrode Rotation And Discharge Analysis Method." Ozone: Science & Engineering 22, no. 6 (December 2000): 563–74. http://dx.doi.org/10.1080/01919510009408799.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Diacu, Elena, Adinuta Paun, Veronica Anastasoaie, Georgiana-Luiza Arnold-Tatu, Liviu Birzan, and Eleonora-Mihaela Ungureanu. "Electroactive properties of a new azulene thioxo-imidazolidin-4-one ligand for modified electrodes." Journal of Electrochemical Science and Engineering 10, no. 2 (March 9, 2020): 209–17. http://dx.doi.org/10.5599/jese.727.

Full text

Abstract:

The electrochemical characterization of a new synthesized azulene compound (Z)-5-((5-isopropyl-3,8-dimethylazulen-1-yl)methylene)-2-thioxoimidazolidin-4-one (L) using cyclic voltammetry, differential pulse voltammetry and rotating disk electrode is presented. Chemically modified electrodes were obtained by successive scanning or by controlled potential electrolysis using different electrode potentials or charges. The new modified electrodes were tested in solutions containing different concentrations of the following heavy metals: cadmium, lead, mercury and copper. A good analytical response was obtained for Pb2+.

APA, Harvard, Vancouver, ISO, and other styles

14

Loučka, Tomáš, and Jaroslav Němec. "Reduction of Eu(III) on rotating disc Pt and Cu electrodes." Collection of Czechoslovak Chemical Communications 56, no. 2 (1991): 306–8. http://dx.doi.org/10.1135/cccc19910306.

Full text

Abstract:

The reduction of Eu(III) on rotating disc Pt and Cu electrodes was studied in the medium of chlorides containing some other rare earth elements. The rate constants of the electrode reaction Eu3+ ⇆ Eu2+ were determined and compared with the values obtained earlier by cyclic voltammetry.

APA, Harvard, Vancouver, ISO, and other styles

15

Chumanov, I. V., M. A. Matveeva, and D. V. Sergeev. "INFLUENCE OF CONSUMABLE ELECTRODE ROTATION ON ANISOTROPY OF PROPERTIES OF THE BILLET OBTAINED BY ELECTROSLAG REMELTING." Izvestiya. Ferrous Metallurgy 62, no. 2 (March 30, 2019): 91–96. http://dx.doi.org/10.17073/0368-0797-2019-2-91-96.

Full text

Abstract:

The article presents theoretical substantiation of the influence of electroslag remelting technology with rotation of consumable electrode on physicomechanical properties of the formed casting (billet). The technology of electroslag remelting with rotation of consumable electrode around its own axis leads to formation of upward flow of heat in the slag bath, making hydrodynamic environment in mold more rational from the point of using generated heat. During rotation of consumable electrode, centrifugal forces act on liquid metal film formed at the end of the electrode, providing radial flow of molten metal droplets. Subsequent separation occurs from the outer perimeter of electrode. Thus, drops of electrode metal fall into the metal bath closer to the wall of the mold, aligning temperature front of the bath. Decrease in temperature gradient of bath over the cross section leads to a flatter crystallization front. Studied technology of electroslag remelting with rotation of consumable electrode should have an impact on physical and mechanical properties of resulting casting (billet). In order to establish effect of rotation of consumable electrode during electroslag remelting on properties of metal obtained, experimental remelting was carried out. The article presents data on experimental electroslag remelting of electrodes of 20Kh13 grade steel using various technologies at A-550 unit. In course of experiment, influence of rotation technology of consumable electrode on conditions of remelting process, billet crystallization, changes in mechanical and physical properties was established. The influence of remelting method on complex properties of resulting billet was analyzed. As the main research tool, processing of the obtained data on microhardness, density, dendritic cell size of experimental samples was used. Analysis of the research results of billets in transverse direction showed an increase in microhardness uniformity in implementation of electroslag remelting technology with rotation of consumable electrode along the course of smelting. It is also shown that use of the rotation technology reduces size of dendritic cell of billet and increases density of the ingot formed in comparison with traditional technology without rotating electrode.

APA, Harvard, Vancouver, ISO, and other styles

16

Lin, Andrew S., Jerry Chen, and Trav Huang. "Electrochemical Oxidation of Dissolved Carbon Monoxide on Rotating Disk Electrodes and Micro-Electrodes." Advanced Materials Research 1101 (April 2015): 144–48. http://dx.doi.org/10.4028/www.scientific.net/amr.1101.144.

Full text

Abstract:

This work was to study the dissolved CO in solution phase by using rotating disk electrodes and the solution phase CO demonstrate the limiting currents dependence of rotating speeds. Gold and gold-platinum metals clusters are used in glassy carbon supported rotating disk electrode for electrochemical oxidation of the solution phase CO. Small metal clusters and Au-Pt alloy effects are observed in the measurements. The comparison of microelectrode and RDE study of solution phase CO electrochemical oxidation is confirmed the limiting currents dependence of the boundary layers concentrations.

APA, Harvard, Vancouver, ISO, and other styles

17

Weng, Fang-Bor, Ay Su, Yasuhiro Kamotani, and Simon Ostrach. "Gas Evolution in Rotating Electrochemical Cells Under Reduced and Normal Gravity Conditions." Journal of Mechanics 19, no. 3 (September 2003): 349–55. http://dx.doi.org/10.1017/s1727719100003191.

Full text

Abstract:

AbstractElectrochemical experiments in microgravity are essential for the optimum design of advanced life support systems and power storage systems in space. In the absence of gravity, the evolved gas bubbles will clog the electrode and slow the reaction. Here, a rotating cell concept is introduced as a plan for improving mass transfer and bubble removal in a microgravity environment. A primary experimental study of bubble behavior in rotating water electrolysis cells has been done in reduced gravity through KC-135 parabolic flight. The results show that the cell resistance decreases with increasing rotation rate. Without rotation, the bubbles stick on the electrode surface during reduced gravity period, thus, the cell efficiency degrades. Mass transfer enhanced by bubble generation is investigated in ground-based work at high rotation rate of test cells, so that gravitational effects are minimized.

APA, Harvard, Vancouver, ISO, and other styles

18

BAUNE, M., V. BREUNIG-LYRITI, and P. J. PLATH. "INVARIANT HYDRODYNAMIC PATTERN FORMATION: FAST ROTATING DISK ELECTRODE UNDER DISSOLUTION CONDITIONS." International Journal of Bifurcation and Chaos 12, no. 12 (December 2002): 2835–45. http://dx.doi.org/10.1142/s0218127402006242.

Full text

Abstract:

During the dissolution of stainless steel in a highly concentrated iron(III) chloride (3.5 M) solution, patterns in the micrometer range can be observed on the surface of the rotating disk. These patterns are formed by convection vortices in the direction of hydrodynamic flow. At fast rotational speeds (2000–6000 rpm), the etched patterns are spiral in shape. By digitizing the observed patterns, the mathematical equation for the spirals can be determined and a description obtained for their invariant logarithmic shape, with an aspect ratio of [Formula: see text] for the radial and tangential velocity. A comparison with classical hydrodynamic equations for the rotating disk electrode and the analysis of previous investigations of patterns formed on slowly rotating disk electrodes provides an explanation for chemically induced invariant hydrodynamic pattern formation.

APA, Harvard, Vancouver, ISO, and other styles

19

Huang, Shao Fu, Di Zhu, Yong Bin Zeng, Wei Wang, and Yong Liu. "Micro-Hole Machined by Electrochemical Discharge Machining (ECDM) with High Speed Rotating Cathode." Advanced Materials Research 295-297 (July 2011): 1794–99. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1794.

Full text

Abstract:

Electrochemical discharge machining (ECDM), based on electrochemical machining (ECM) and electrodischarge machining (EDM), is an unconventional micro-machining technology. In this paper, with the use of water, the process of micro hole on ANSI 304 stainless steel machined by micro-ECDM with high speed rotating cathode is studied. The effects of machining conditions such as the cathode rotating speed and cathode diameter on the surface quality and accuracy of the shape are investigated. The results indicate that a relatively higher electrode rotating speed can improve the machining accuracy of the micro-holes and reduce the electrodes wear.

APA, Harvard, Vancouver, ISO, and other styles

20

Глебова, Н. В., А. О. Краснова, and А. А. Нечитайлов. "Эволюция массотранспортных свойств структурно-модифицированных электродов для топливных элементов и электролизеров воды." Журнал технической физики 91, no. 11 (2021): 1689. http://dx.doi.org/10.21883/jtf.2021.11.51530.107-21.

Full text

Abstract:

The method of a disk electrode (stationary and rotating) was used to study the regularities of changes in the mass transport properties of composite electrodes containing platinum nanoparticles on carbon black, the addition of carbon material with various forms of structural elements (three-dimensional and pseudo-one-dimensional carbon nanotubes with different length-to-diameter ratios), and the proton-exchange polymer Nafion. The transport of molecular oxygen inside a porous electrode to the platinum surface is investigated. Mechanisms for changing the mass transport properties of structurally modified electrodes in the course of electrochemical action are proposed.

APA, Harvard, Vancouver, ISO, and other styles

21

Mota de Oliveira, Ana F. S., S. R. F. Soares, P. S. D. Brito, and César A. C. Sequeira. "Metals Recovery using a Rotating-Cylinder Electrode." Key Engineering Materials 230-232 (October 2002): 365–68. http://dx.doi.org/10.4028/www.scientific.net/kem.230-232.365.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Boxall, Colin. "Photoelectrochemistry with the optical rotating disc electrode." Journal of Photochemistry and Photobiology A: Chemistry 148, no. 1-3 (May 2002): 375–86. http://dx.doi.org/10.1016/s1010-6030(02)00065-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Qi, Liming, Fan Yuan, Fengxia Wu, Xiangui Ma, Christian Amatore, and Guobao Xu. "3D Printed Rotating Acentric Binary-Disk Electrode." Analytical Chemistry 90, no. 22 (October 19, 2018): 13217–21. http://dx.doi.org/10.1021/acs.analchem.8b03393.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Kumagae, Ryohei. "Operation Technique of Plasma Rotating Electrode Process." Materia Japan 37, no. 6 (1998): 488–94. http://dx.doi.org/10.2320/materia.37.488.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Melville, James L., and Richard G. Compton. "Pulse voltammetry at the rotating disc electrode." Journal of Electroanalytical Chemistry 501, no. 1-2 (March 2001): 114–27. http://dx.doi.org/10.1016/s0022-0728(00)00513-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Morrison, B., K. Striebel, P. N. Ross, and P. C. Andricacos. "Kinetic studies using a rotating cylinder electrode." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 215, no. 1-2 (December 1986): 151–60. http://dx.doi.org/10.1016/0022-0728(86)87012-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Yabe, Hideki, Keiko Ema, and Yasuhiko Ito. "Rotating ring disk electrode in molten chloride." Electrochimica Acta 34, no. 10 (October 1989): 1479–83. http://dx.doi.org/10.1016/0013-4686(89)87191-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Tellenbach, J. M., and D. Landolt. "Rotating disk electrode studies in cryolitic melts." Electrochimica Acta 33, no. 2 (February 1988): 221–25. http://dx.doi.org/10.1016/0013-4686(88)80006-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Otero, T. F., and J. Rodríguez. "Polythiophene electrogeneration on a rotating disk electrode." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 310, no. 1-2 (July 1991): 219–37. http://dx.doi.org/10.1016/0022-0728(91)85263-o.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Li, Xiao Hai, Li Ping Zhao, Ying Chun Shi, and Li Jie Zhao. "Study on Micro Electrochemical Machining Technology and its Influencing Factors." Applied Mechanics and Materials 395-396 (September 2013): 1062–65. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.1062.

Full text

Abstract:

Electrochemical machining (ECM) is an anodic dissolution process of metal as anode ion by ion, and micro-ECM is a promising micromachining method at micro to meso-scale. Thus, a micro-ECM setup was developed to fabricate micro parts and explore the feasibility of micro-ECM at micro to meso-scale, including the design of high-frequency micro-energy pulse power supply. By using the detection unit of machining state and optical encoder, a closed loop control system for micro-ECM was developed. Under low concentration of passivating electrolyte, low machining voltage, micro rotating electrode and high-frequency short-pulse current, the machining gap can be reduced to about 10μm. The influence factors of the additives and the rotation of micro electrode on micro ECM were analysed by experiments. A micro-hole about 30μm in diameter was drilled by the rotating micro electrode.

APA, Harvard, Vancouver, ISO, and other styles

31

Amayreh, Mohammad, and Mohammed Khair Hourani. "Determination of Iron in Spinach Using Linear Sweep Voltammetry at Iodine-Coated Platinum Rotating Disk Electrode." Journal of AOAC INTERNATIONAL 102, no. 2 (March 1, 2019): 666–68. http://dx.doi.org/10.5740/jaoacint.18-0267.

Full text

Abstract:

Abstract Background: In contrast to the hyper-reactive platinum electrode, iodine-coated platinum electrode shows remarkable inertness toward adsorption and surface processes. For this reason, iodine-coated platinum electrode lends itself to interesting voltammetric applications. Hydrodynamic voltammetric analysis, one of the voltammetric techniques family, has many advantages over stationary voltammetric techniques inter aliathe steady state current and the higher sensitivity. Objective: The present work is aimed at utilization of iodine-coated platinum rotating disk electrode for analysis of iron in spinach.Methods: The developed method is based on a voltammetric sweep at an iodine-coated rotating-disk platinum electrode. The optimized experimental parameters included a potential scan from –0.20 to 0.85 V versus Ag/AgCl/[Cl-] = 1.0 M, 50 mV/s scan rate, and a rotation rate of 1000 rpm. Results: Oxidation of iron at the iodine-coated platinum rotating disk electrode was manifested by a wave at E1/2 = +0.72 V. The limiting current was found to exhibit an excellent linearity with the concentration of iron (R2 = 0.996). The detection limit was 0.0 7 ppm. A comparative analytical study on determination of iron content in spinach samples was conducted by the voltammetric method and ICP-OES method. Application of the paired t-test to the results indicated that the null hypothesis is valid at P = 0.05. Conclusions: A sensitive and selective validated method was developed for determination of iron content in spinach. Highlights: A simple, fast, and reliable voltammetric methodwas developed for iron analysis in spinach. The main feature of the developed method is removing the effect of cationic interferences.

APA, Harvard, Vancouver, ISO, and other styles

32

Cserey, Andrea, and Miklós Gratzl. "Rotating Sample System: An Equivalent of a Rotating Electrode for Microliter Samples." Analytical Chemistry 69, no. 18 (September 1997): 3687–92. http://dx.doi.org/10.1021/ac9703156.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Barek, Jiri. "How to Improve the Performance of Electrochemical Sensors via Minimization of Electrode Passivation." Chemosensors 9, no. 1 (January 6, 2021): 12. http://dx.doi.org/10.3390/chemosensors9010012.

Full text

Abstract:

It follows from critical evaluation of possibilities and limitations of modern voltammetric/amperometric methods that one of the biggest obstacles in their practical applications in real sample analysis is connected with electrode passivation/fouling by electrode reaction products and/or matrix components. This review summarizes possibilities how to minimise these problems in the field of detection of small organic molecules and critically compares their potential and acceptability in practical laboratories. Attention is focused on simple and fast electrode surface renewal, the use of disposable electrodes just for one and/or few measurements, surface modification minimising electrode fouling, measuring in flowing systems, application of rotating disc electrode, the use of novel separation methods preventing access of passivating particles to electrode surface and the novel electrode materials more resistant toward passivation. An attempt is made to predict further development in this field and to stress the need for more systematic and less random research resulting in new measuring protocols less amenable to complications connected with electrode passivation.

APA, Harvard, Vancouver, ISO, and other styles

34

Low, C. T. John, Carlos Ponce de Leon, and Frank C. Walsh. "The Rotating Cylinder Electrode (RCE) and its Application to the Electrodeposition of Metals." Australian Journal of Chemistry 58, no. 4 (2005): 246. http://dx.doi.org/10.1071/ch05034.

Full text

Abstract:

The application of rotating cylinder electrodes (RCEs) to electrodeposition has progressed significantly over the last decade. New tools for theoretical and experimental investigations have been developed in academia and in industry, with some RCE devices being commercially developed. This paper reviews the continued application of RCEs to quantitative electrodeposition studies of single metals, alloys, and composite, multilayered, and nanostructured electrodeposits with a constant or controlled range of current densities along the RCE under turbulent flow conditions. Rotating cylinder electrode electrochemical reactors, enhanced mass transport, rotating cylinder Hull cell, and uniform and non-uniform current and potential distributions are considered. The applications of ultrasound, porous reticulated vitreous carbon cathodes, expanded metal/baffles, and jet flow around the RCE are also included. The effects of electrolyte flow and cathode current density on electrodeposition have been rationalized. Directions for future RCE studies are proposed.

APA, Harvard, Vancouver, ISO, and other styles

35

Simard, Stéphan, and Danick Gallant. "A study of the electrochemical behaviour of cobalt in aqueous H2CO3/HCO3/CO32 solutions at pH 79." Canadian Journal of Chemistry 82, no. 5 (May 1, 2004): 583–94. http://dx.doi.org/10.1139/v04-033.

Full text

Abstract:

The electrochemical behaviour of a cobalt rotating electrode in H2CO3/HCO3/CO32 aqueous solutions was investigated in the pH region from 7 to 9. The effects of H2CO3/HCO3/CO32 concentration, pH, and the presence of phosphates as inhibitors was explored using a rotating disc electrode at 1000 rpm. Some potentiodynamic experiments indicate that for pH 8.5 and higher, carbonate and bicarbonate species play a key role on the rate of electrooxidation of cobalt. For pH lower than 8.5, the electrochemical behaviour of cobalt changes drastically and very aggressive corrosion is observed. The involvement of carbonic acid must be considered in the corrosion process of cobalt in this pH region. The study of passive film potential decay under open circuit potential and galvanostatic reduction was performed on preanodized cobalt electrodes in solutions of various compositions. These experiments indicated the phenomena occurring at the electrodesolution interface during the corrosion process. A mechanism involving competitive adsorption of different species is suggested on the basis of the experimental evidence.Key words: cobalt, bicarbonate, phosphate, carbonic acid, corrosion.

APA, Harvard, Vancouver, ISO, and other styles

36

Pop, Maria Daniela, Veronica Anastasoaie, Mariana Apostoiu Popescu, Alexandra Oprisanu, Eleonora Mihaela Ungureanu, and Mihaela Cristea. "New Azulene Modified Electrodes for Heavy Metal Sensing." Revista de Chimie 68, no. 9 (October 15, 2017): 2172–75. http://dx.doi.org/10.37358/rc.17.9.5850.

Full text

Abstract:

The electrochemical characterization of 2,6-bis((E)-2-(furan-2-yl)vinyl)-4-(5-isopropyl-3,8-dimethylazulen-1-yl) pyridine has been performed by cyclic voltammetry, differential pulse voltammetry and rotating disk electrode. Modified electrodes were obtained by cycling the potential in the anodic scans or by controlled potential electrolysis (CPE) at different potentials and charges. The modified electrodes have been tested for mercury, cadmium, copper and lead ions detection.

APA, Harvard, Vancouver, ISO, and other styles

37

Gopal, R., K. R. Thangadurai, and K. Thirunavukkarasu. "Electrical Discharge Machining Characteristics of ECAP Copper Electrode." Materials Science Forum 969 (August 2019): 738–43. http://dx.doi.org/10.4028/www.scientific.net/msf.969.738.

Full text

Abstract:

Enormous research work has done on the electrode wear in spark erosion machining such as hybrid electrical discharge machining process, introducing various methods such as ultrasonic vibration in electrode, rotating the electrode, developing new electrode material (alloys and composites) and surface coated electrode etc,. Equal Channel Angular pressing is one such technique which makes tool material harder through grain refinement and ultimately enhances the tool life. The work material is AISI H13. For this research work, two copper electrodes are prepared, out of which one copper electrode has undergone equal channel angular pressing process. The most influencing parameters of spark machining like current, pulse on time and pulses off time are chosen for this study. The experiments are conducted using bare copper electrode and equal channel angular pressed copper electrode based on the box Behnken approach. The observations are analyzed for the machining characteristics in terms of rate of machining, rate of tool erosion and surface coarseness. Finally, it is found that ECAP processed copper electrode has lesser wear rate and better surface finish than bare copper electrode.

APA, Harvard, Vancouver, ISO, and other styles

38

Uchida, M., M. Uda, T. Iwadachi, M. Nakamichi, and H. Kawamura. "Elemental development of beryllide electrode for pebble production by rotating electrode method." Journal of Nuclear Materials 329-333 (August 2004): 1342–46. http://dx.doi.org/10.1016/j.jnucmat.2004.04.195.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Potvin, E., M. Drogowska, H. Ménard, and L. Brossard. "La dissolution anodique du cuivre en présence d'ions F− dans des solutions aqueuses acides." Canadian Journal of Chemistry 65, no. 9 (September 1, 1987): 2109–13. http://dx.doi.org/10.1139/v87-350.

Full text

Abstract:

The influence of F− ions on the anodic dissolution of copper in aqueous acidic solutions (pH 1.6–6), mainly at pH 5 with 0.1 M KF, has been studied. The nature of the changes that occur on the electrode during the oxidation has been examined by cyclic voltamperometry as well as by different techniques of surface analysis (SEM, XPS, AES). To determine the mechanism of the electrochemical oxidation of copper at pH 5, studies with rotating disk electrodes have been carried out under conditions giving rise to a general dissolution of copper. At pH 1.6–6, the copper electrode dissolves uniformly, i.e., without preferential zones on the surface, when it is submitted to a potentiodynamic polarization (10 mV s−1) at potentials above 0 VECS. At slightly acidic pH (pH 5, KF0.1 M), with a sweep of potential up to +0.5 V, the oxidation of copper begins with a generalized corrosion of the electrode and it is followed by the formation of a film of Cu2O that is not passivating; as the oxidation proceeds, the current drops and the electrode becomes passivated. One model for the anodic dissolution is presented for the results obtained at pH 5. When a uniform corrosion develops on the rotating electrode, the copper is oxidized to Cu2+ ions. When ω → 0, the rate of dissolution of the electrode is limited by the diffusion of the Cu2+ ions from the electrode to the solution, whereas when ω → ∞ the process of charge transfer is the limiting factor to the kinetics of the dissolution. [Journal translation]

APA, Harvard, Vancouver, ISO, and other styles

40

Barek, Jiří, Antonín Berka, Marion Müller, and Jiří Zima. "Determination of 4-nitrobiphenyl and 4-aminobiphenyl by controlled-potential coulometry, differential pulse polarography and differential pulse voltammetry." Collection of Czechoslovak Chemical Communications 50, no. 12 (1985): 2853–62. http://dx.doi.org/10.1135/cccc19852853.

Full text

Abstract:

Conditions were sought for the determination of 4-nitrobiphenyl by controlled-potential coulometry based on its reduction on a mercury pool electrode and for its polarographic determination on a dropping mercury electrode, with detection limits of 0.7 μmol l-1 for TAST polarography and 0.06 μmol l-1 for DP polarography. The reduction of this compound on a glassy carbon electrode was employed for its determination with detection limits of 10 μmol l-1 for DC voltammetry on a rotating electrode and 1 μmol l-1 for DP voltammetry on a stationary electrode. For 4-aminobiphenyl, its oxidation on a glassy carbon electrode was employed for the determination; the detection limits were 10 μmol l-1 for DC voltammetry on a rotating electrode and 0.5 μmol l-1 for DP voltammetry on a stationary electrode.

APA, Harvard, Vancouver, ISO, and other styles

41

Y., Gerasymchuk,, Adamenko, O., Lavrishchev, A., and Novoselytskiy, Y. "Determination parameters of the precipitating electrode of the electrotechnical means for cleaning air of livestock buildings from harmful gases and bacterial contamination." Mehanization and electrification of agricultural, no. 9(108) (2019): 141–48. http://dx.doi.org/10.37204/0131-2189-2019-9-17.

Full text

Abstract:

Purpose. Get dependence to determine the mass of the chemical adsorbent which is contained on the rotating precipitating electrode of the electrotechnical means, taking into account the kinetics of the process of air purification of livestock buildings from harmful gases and bacterial contamination with the complex use of electrophysical and chemical methods of decontamination and air purification. Methods. Analysis of the influence of chemical adsorbent and crown discharge field on the efficiency of air purification of livestock buildings from harmful gases and bacterial contamination. Experimental researches for determination of basic parameters of a precipitating electrode of an electrotechnical means. Results. Scheme of the electrotechnical means with the complex using of electrophysical and chemical methods of purification and disinfection of recirculation air of ventilation emissions from ammonia, carbon dioxide, hydrogen sulfide and bacterial contamination. Polynomial dependence for determining the mass of a chemical adsorbent which is contained on a rotating depositing electrode. Conclusions. Complex using of the electrotechnical means for air purification from harmful gases and bacterial contamination of the recirculation air flow and the utilization heat of ventilation emissions with the implementation anti-icing protection heat exchange surface of the recuperative heat utilizers allows to reduce the level of air exchange and significantly reduce energy costs to provide regulatory airspace of livestock buildings in the cold season. On the disks of precipitating electrodes of an electrotechnical mean for cleaning and disinfection of recirculation air of ventilation emissions, it is necessary to fix a polymer mesh with an area of cellules of 16 mm2, and the frequency rotation of the discs to support within the range from 0.25 s-1 to 1 s-1. Keywords: microclimate, heat utilizer, recuperate, air purification, corona discharge, precipitating electrode.

APA, Harvard, Vancouver, ISO, and other styles

42

Ye, Qingshan, and Mark E. Meyerhoff. "Rotating Electrode Potentiometry: Lowering the Detection Limits of Nonequilibrium Polyion-Sensitive Membrane Electrodes." Analytical Chemistry 73, no. 2 (January 2001): 332–36. http://dx.doi.org/10.1021/ac000756g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Xu, Yun Lan, and Jin Ping Jia. "TiO₂/Ti Electrode Preparation, Characterization and its Photoelectrocatalytic Stability." Advanced Materials Research 393-395 (November 2011): 1579–82. http://dx.doi.org/10.4028/www.scientific.net/amr.393-395.1579.

Full text

Abstract:

TiO2/Ti electrode, photoelectrocatalysis (PEC), rotating disk reactor, dye. Abstract: In this work, TiO2/Ti electrode was prepared by sol-gel method and its character was investigated by ﬁeld emission scanning electron microscope (FESEM), X-ray reﬂection diffraction (XRD) spectra, UV-Vis diffuse reflection absorption spectra and photoelectro-response analysis. FESEM and XRD analysis demonstrates the TiO2 particles were uniform, about 50 nm and almost anatase, UV-Vis diffuse reflection analysis demonstrates the absoption fringe of TiO2 was 400 nm, and photoelectro-response analysis demonstrates the photoelectro-response capability of the photocatalyst was evident and decreased with the dye solution concenstrate increased. The results of stability and reproducibility of TiO2/Ti electrode demonstrates repetition of both multi-runs of mono-electrode and mono-run of multi-electrodes was excellent, which indicates TiO2/Ti electrode prepared by sol-gel method can degrade dye wastewater high-effectively and stably.

APA, Harvard, Vancouver, ISO, and other styles

44

Глебова, Н. В., А. О. Краснова, and А. А. Нечитайлов. "Исследование транспорта кислорода в структурно-модифицированных электродах методом вращающегося дискового электрода." Журнал технической физики 91, no. 7 (2021): 1148. http://dx.doi.org/10.21883/jtf.2021.07.50956.354-20.

Full text

Abstract:

The features of the transfer of molecular oxygen in platinum-carbon electrodes with mixed conductivity containing structural-modifying additives with structural elements of different types: short and long carbon nanotubes with elongated structural elements with different length / diameter ratios and graphene-like materials with almost two-dimensional planes have been investigated using the methods of a stationary and rotating disk electrode.

APA, Harvard, Vancouver, ISO, and other styles

45

Weng, Yu-Ching, Cheng-Jen Ho, Hui-Hsuan Chiao, and Chen-Hao Wang. "Pt3Ni/C and Pt3Co/C cathodes as electrocatalysts for use in oxygen sensors and proton exchange membrane fuel cells." Zeitschrift für Naturforschung B 75, no. 12 (December 16, 2020): 1029–35. http://dx.doi.org/10.1515/znb-2020-0116.

Full text

Abstract:

AbstractThe composites Pt3Ni/C and Pt3Co/C are electrocatalysts for oxygen reduction reactions (ORRs). This study compares the electrocatalytic activity of these electrodes that are used to detect oxygen, and determines their suitability for use in proton exchange membrane fuel cells (PEMFCs). Chemical reduction is used to produce the Pt3Ni/C and Pt3Co/C electrocatalysts. The particle size, elemental composition and crystallinity of the intermetallic electrocatalysts are determined using transmission electron microscopy (TEM) and an energy-dispersive spectrometer (EDX). The ORR activity of the Pt3Ni/C and Pt3Co/C electrocatalysts is determined using cyclic voltammetry (CV), a polarization curve (PC) and a rotating disk electrode (RDE). The Pt3Ni/C electrode registers a greater current for the ORR as compared to the Pt3Co/C electrode. Both electrodes exhibit a linear relationship between response current and oxygen concentration in the detection range from 100 to 1000 ppm. The Pt3Ni/C electrode exhibits a significant sensitivity to oxygen up to 13.4 μA ppm−1 cm−2. A membrane electrode assembly (MEA) that is produced using Pt3Ni/C as a cathodic electrocatalyst in a single PEMFC generates a maximum power density of 1097 mW cm−2.

APA, Harvard, Vancouver, ISO, and other styles

46

Ito, Yasuo, S. Hikino, and K. Ema. "Rotating Ring Disk Electrode in Molten Chloride Systems." Materials Science Forum 73-75 (January 1991): 409–14. http://dx.doi.org/10.4028/www.scientific.net/msf.73-75.409.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Sulaymon, Abbas H., and Ali H. Abbar. "Mass Transfer to Amalgamated Copper Rotating Disk Electrode." Journal of Electrochemical Science and Technology 3, no. 4 (December 31, 2012): 165–71. http://dx.doi.org/10.5229/jecst.2012.3.4.165.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Sulaymon, Abbas H., and Ali H. Abbar. "Mass Transfer to Amalgamated Copper Rotating Disk Electrode." Journal of Electrochemical Science and Technology 3, no. 4 (December 31, 2012): 165–71. http://dx.doi.org/10.33961/jecst.2012.3.4.165.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Bradley, P. E., and D. Landolt. "New Cell Design for Inverted Rotating Disk Electrode." Journal of The Electrochemical Society 144, no. 6 (June 1, 1997): L145—L148. http://dx.doi.org/10.1149/1.1837705.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Kimla, Arnošt, and Jiří Míčka. "The Diffusion Flow to a Rotating Line Electrode." Collection of Czechoslovak Chemical Communications 59, no. 2 (1994): 273–86. http://dx.doi.org/10.1135/cccc19940273.

Full text

Abstract:

A mathematical model for convective diffusion to the so-called line electrode was solved by combination of the analytical and numerical approaches. All terms of the diffusion equation were respected. A semiempirical formula was derived, extending appreciably its applicability with respect to the decisive physical and geometric parameters.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!