Relevant bibliographies by topics / Electrochemical apparatus

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Electrochemical apparatus'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Electrochemical apparatus"

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Sugano, Karen, Mgcini Keith Phuthi, Pinwen Guan, Venkat Viswanathan, and Yet-Ming Chiang. "Pressure-Electrochemistry as a Pathway to Novel Metal Hydrides." ECS Meeting Abstracts MA2023-01, no. 44 (August 28, 2023): 2387. http://dx.doi.org/10.1149/ma2023-01442387mtgabs.

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We have developed a pressure-electrochemical cell apparatus to electrochemically insert hydrogen into metals at applied pressures of 1GPa. The coupling of pressure and potential (P^2) was motivated by our recent density functional theory calculations that predicted the stability of novel metal hydride phases when both pressure and potential are applied [1]. In this work, we adapted a traditional piston-cylinder pressure apparatus into a pressure-electrochemical cell by replacing the inert pressure transmitting medium with a proton-conducting liquid electrolyte (1M NaOH + polyvinyl alcohol) such that it not only provides hydrostatic pressure but also reduces into hydrogen, which is then absorbed into the metal cathode. The pressure being applied by the electrolyte was verified by measuring an increase in the electrical resistance of manganin alloy with pressure. We then electrochemically hydrogenated yttrium foil under varying pressures ranging from 0.25 to 1GPa, measuring the extent of hydrogenation post-mortem using x-ray diffraction. We find that the application of pressure suppresses hydrogen evolution, improving the current efficiency of hydrogenation of Y into YH3 from 45% at 0.25GPa to 75% at 1GPa. The development of the pressure-electrochemical apparatus unlocks a new pathway in potentially synthesizing novel metal hydrides. [1] P.-W. Guan, R. J. Hemley, V. Viswanathan, Proceedings of the National Academy of Sciences. 118, e2110470118 (2021).
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Cunningham, Larry, and Henry Freiser. "Computer-controlled apparatus for interfacial electrochemical studies." Langmuir 1, no. 5 (September 1985): 537–41. http://dx.doi.org/10.1021/la00065a003.

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El-Hofy, H., and J. A. McGeough. "Evaluation of an Apparatus for Electrochemical Arc Wire-Machining." Journal of Engineering for Industry 110, no. 2 (May 1, 1988): 119–23. http://dx.doi.org/10.1115/1.3187859.

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Electrochemical Arc Machining (ECAM) combines electrochemical dissolution and electro discharge in order to achieve metal removal rates, that can be about five and fifty times greater than those of electrochemical (ECM) and electrodischarge (EDM) machining, respectively. Since ECAM has already been successfully applied to hole-drilling, for this paper the prospects for wire-machining by this process have been explored. An apparatus for wire-ECAM is described, and the results of tests performed to assess the feasibility of the technique are presented. To that end, the effects of mode of electrolyte flushing, wire erosion and machining speed on metal removal rate and accuracy are discussed.
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Chua, Chun Kiang, Zdeněk Sofer, Bahareh Khezri, Richard D. Webster, and Martin Pumera. "Ball-milled sulfur-doped graphene materials contain metallic impurities originating from ball-milling apparatus: their influence on the catalytic properties." Physical Chemistry Chemical Physics 18, no. 27 (2016): 17875–80. http://dx.doi.org/10.1039/c6cp03004a.

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Ball-milling apparatus is a source of metallic impurities in graphene materials. Sulfur-doped graphene obtained from zirconium dioxide-based ball-milling apparatus contains drastically lower amount of metallic impurities than that obtained from stainless-steel based ball-milling apparatus. The metallic impurities exhibit catalytic effects toward the electrochemical catalysis of hydrazine and cumene hydroperoxide.
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Leung, Lam‐Wing H., Thomas W. Gregg, and D. Wayne Goodman. "A new combined ultrahigh vacuum and electrochemical apparatus." Review of Scientific Instruments 62, no. 7 (July 1991): 1857–58. http://dx.doi.org/10.1063/1.1142382.

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Aida, Nur, Kenji Ishibashi, Shouhei Nakamura, Soya Tsuda, and Ima Hayashi. "ELECTROCHEMICAL ANALYSIS ON OUTPUT CURRENTS OF NEUTRINO ANTINEUTRINO-SENSITIVE APPARATUS." AGRIBUSINESS JOURNAL 12, no. 2 (July 15, 2019): 157–65. http://dx.doi.org/10.15408/aj.v12i2.11866.

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We analyze the interaction of antineutrinos with water particle in electrochemical detectors. We postulate that some biological products generate a scalar auxiliary field B0 which breaks low-energy antineutrinos into boson vb and fermion v f particles. Low-energy anti neutrinos are suggested to interact with water molecules and produce output currents. We examine the output current of neutrino interactions in the electrochemical apparatus with chemical-reaction equations and half-cell model under postulated influence of weak interaction. The environmental neutrino is analysed. The output currents are treated to be generated by hydrogen ion and oxygen with the half-cell model with inclusion of weak interaction effect on hydrooxide ion recombination.
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Chen, Ge Hua. "Study on Stability Exponent Apparatus." Key Engineering Materials 531-532 (December 2012): 551–54. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.551.

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The stability index apparatus is presented, which adopts electrochemical principle and microcontroller technology to determine the solution alkalinity of the circulating water processed by CaCO3. Base on it, this apparatus calculates the stability exponent to evaluate whether the measured water is stable, or existing the tendency of fouling or corrosion. The scaling and the corrosion of pipes and equipments are relieved by controlling the quality of the circulating water. This paper presents the new stability exponent apparatus with which the stability of the water quality can be determined accurately and provides the basis for controlling the water quality. The automatic control of water quality is realized by this apparatus with the cooperation of the dosing system, ensuring the circulating water piping to be safe and stable.
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Borkiewicz, Olaf J., Badri Shyam, Kamila M. Wiaderek, Charles Kurtz, Peter J. Chupas, and Karena W. Chapman. "The AMPIX electrochemical cell: a versatile apparatus forin situX-ray scattering and spectroscopic measurements." Journal of Applied Crystallography 45, no. 6 (November 15, 2012): 1261–69. http://dx.doi.org/10.1107/s0021889812042720.

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This article presents a versatile easy-to-use electrochemical cell suitable forin operando,in situmeasurements of battery materials during electrochemical cycling using a variety of X-ray techniques. Argonne's multi-purposein situX-ray (AMPIX) cell provides reliable electrochemical cycling over extended periods owing to the uniform stack pressure applied by rigid X-ray windows and the formation of a high-fidelity hermetic seal. The suitability of the AMPIX cell for a broad range of synchrotron-based X-ray scattering and spectroscopic measurements has been demonstrated with studies at eight Advanced Photon Source beamlines to date. Compatible techniques include pair distribution function analysis, high-resolution powder diffraction, small-angle scattering and X-ray absorption spectroscopy. These techniques probe a broad range of electronic, structural and morphological features relevant to battery materials. The AMPIX cell enables experiments providing greater insight into the complex processes that occur in operating batteries by allowing the electrochemical reactions to be probed at fine reaction intervals with greater consistency (within the charge–discharge cycle and between different methodologies) with potential for new time-dependent kinetic studies or studies of transient species. Representative X-ray and electrochemical data to demonstrate the functionality of the AMPIX cell are presented.
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Schroeder, Chelsea M., Taylor M. Koehler, Kristiane K. Ohlhorst, and Nicholas E. Leadbeater. "Real-time in situ monitoring using visible spectrophotometry as a tool for probing electrochemical advanced oxidation processes for dye decolorisation." RSC Advances 13, no. 48 (2023): 33559–65. http://dx.doi.org/10.1039/d3ra06634g.

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Shestakov, K. V., S. A. Vyazovov, S. I. Lazarev, and P. A. Khokhlov. "Modeling Kinetic and Thermal Processes in an Electrochemical Membrane Apparatus." Chemical and Petroleum Engineering 57, no. 3-4 (July 2021): 246–50. http://dx.doi.org/10.1007/s10556-021-00925-w.

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Dissertations / Theses on the topic "Electrochemical apparatus"

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Wengenack, Nancy L. "Design and testing of a computer-controlled square wave voltammetry instrument /." Online version of thesis, 1987. http://hdl.handle.net/1850/8853.

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Fannon, Terry Michael. "Simultaneous NO/SO[subscript x] removal using an electrochemical concentrator device." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/11198.

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Thomas, Michael B. "Application of a swept-potential electrochemical detector to the HPLC analysis of nitrosamines and carbamate pesticides." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/26978.

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Lao, Zhuo Jin. "Metal oxides as electrode materials for electrochemical capacitors." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060726.101327/index.html.

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Coignet, Philippe. "Transport-reaction modeling of the impedance response of a fuel cell." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0526104-151500/.

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Xu, Fuming, and 許富明. "The distribution and fluctuation of electrochemical capacitance in mesoscopic systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41508737.

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Xu, Fuming. "The distribution and fluctuation of electrochemical capacitance in mesoscopic systems." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41508737.

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Mikkelsen, Susan R. "Electroanalysis in highly resistive media." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75776.

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The objective of this research was to design and evaluate an instrumental method for electroanalysis in highly resistive media. A coulostatic detector for high performance liquid chromatography was designed and constructed. Equations were developed to describe the detector's performance under regenerative and nonregenerative experimental conditions. With mobile phases of high resistance, the detector was found to respond to both electroactive and ionic electroinactive species with the magnitude of the observed signal depending on the recent history of the electrode. Thus, the elimination of iR drop by the coulostatic method does not provide a straightforward method for electroanalysis in highly resistive media. At low electrolyte concentrations, double-layer effects become prominent. A method was devised to quantitate the static double-layer effect at solid electrodes.
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Nasuhoglu, Deniz. "Synthesis of carbon nanotubes on metallic grids for applications in electrochemical capacitors." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112580.

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Recently, there has been a growing demand for electrode materials to serve as electrochemical capacitors (EC). It has been an important issue to come up with environment friendly electric power sources to reduce pollution caused by combustion engines of automotive systems. Even though conventional battery systems and fuel cells supply high energy, they lack the high specific power that would be required for hybrid power sources. The ECs can fill the gap between conventional capacitors and batteries.
Carbon nanotubes (CNTs), discovered by Iijima in 1991, attracted great attention in recent years for their unique properties, such as mesoporous character, excellent conductivity, moderate to high specific surface area as well as chemical and mechanical stability. These properties of CNTs make them useful in a wide of range applications including electrode materials for EC applications.
The preparation of CNT electrodes is accomplished by either pasting them onto metallic current collectors with the use of binder materials such as PVDF or growing them from deposited metal nanoparticles on substrates such as graphite paper. The deposition of metal nanoparticles is achieved via sputtering techniques or lengthy electrochemical deposition methods. The aim of this research was to simplify the preparation step by growing CNTs directly on metallic substrates and to study the relationship between surface area and electrochemical capacitance of CNTs. CNTs were produced on metal-alloy grids via chemical vapor deposition (CVD) of acetylene (C2H2). The physical characterization of the samples was achieved by Field Emission Scanning Electron Microscopy (FE-SEM), Raman spectroscopy and Single point BET surface area. The electrochemical performance of the samples was evaluated by cyclic voltammetry (CV) in a three electrode electrochemical cell with 1M sulfuric acid (H2SO4) solution as the electrolyte.
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Mleczko, Richard R., and mikewood@deakin edu au. "The development of a new versatile computer controlled electrochemical/ESR data acquisition system." Deakin University. School of Sciences, 1990. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20051125.105959.

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A new versatile computer controlled electrochemlcal/ESR data acquisition system has been developed for the Investigation of short-lived radicals with life-times of 20 milliseconds and greater, Different computer programs have been developed to monitor the decay of radicals; over hours or minutes, seconds or milliseconds. Signal averaging and Fourier smoothing is employed in order to improve the signal to noise ratio. Two microcomputers are used to control the system, one home-made computer containing the M6800 chip which controls the magnetic field, and an IBM PC XT which controls the electrochemistry and the data acquisition. The computer programs are written in Fortran and C, and call machine language subroutines, The system functions by having the radical generated by an electrochemical pulse: after or during the pulse the ESR data are collected. Decaying radicals which have half-lives of seconds or greater have their spectra collected in the magnetic field domain, which can be swept as fast as 200 Gauss per second. The decay of the radicals in the millisecond region is monitored by time-resolved ESR: a technique in which data is collected in both the time domain and in the magnetic field domain. Previously, time-resolved ESR has been used (without field modulation) to investigate ultra-short-lived species with life-times in the region of only a few microseconds. The application of the data acquisition system to chemical systems is illustrated. This is the first time a computer controlled system whereby the radical is generated by electrochemical means and subsequently the ESR data collected, has been developed.
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Books on the topic "Electrochemical apparatus"

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R, Unwin Patrick, ed. Instrumentation and electroanalytical chemistry. Weinheim: Wiley-VCH, 2003.

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V, Santhanam K. S., ed. Ion sensing electrodes and electrochemical instrumentation. Singapore: World Scientific, 1990.

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M, Delnick Frank, Tomkiewicz M, Electrochemical Society Battery Division, Electrochemical Society. Energy Technology Division., and Electrochemical Society Meeting, eds. Proceedings of the Symposium on Electrochemical Capacitors. Pennington, NJ: Electrochemical Society, 1996.

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Symposium on Electrochemical Capacitors (2nd 1996 San Antonio, Texas). Proceedings of the Symposium on Electrochemical Capacitors II. Edited by Delnick Frank M, Electrochemical Society Battery Division, Electrochemical Society. Energy Technology Division., and Electrochemical Society. Physical Electrochemical Division. Pennington, NJ: Electrochemical Society, 1997.

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Morrison, Mark M. Electrons are green: Opportunities in electrochemical synthesis. Norwalk, CT: Business Communications Co., 1994.

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J, Rudd Eric, Walton Clifford W, and Electrochemical Society. Industrial Electrolysis and Electrochemical Engineering Division., eds. Environmental aspects of electrochemical technology: Proceedings of the international symposium. Pennington, NJ: Electrochemical Society, 2000.

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1931-, Romankiw Lubomyr T., Electrochemical Society Electrodeposition Division, and International Symposium on Electrochemical Technology Applications in Electronics (3rd : 1999 : Honolulu, Hawaii), eds. Electrochemical technology applications in electronics: Proceedings of the Third International Symposium. Pennington, NJ: Electrochemical Society, 2000.

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Symposium on Electrochemical Technology in Electronics (1987 Honolulu, Hawaii). Proceedings of the Symposium on Electrochemical Technology in Electronics: 1987 international conference. Pennington, N.J. (10 S. Main St., Pennington 08534-2896): Electrochemical Society, 1988.

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International Symposium on Electrochemical Technology Applications in Electronics (2nd 1993 Honolulu, Hawaii). Proceedings of the Second International Symposium on Electrochemical Technology Applications in Electronics. Pennington, NJ (10 S. Main St., Pennington 08534-2896): Electrochemical Society, 1993.

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International Meeting on Modern Ceramics Technologies (12th 2010 Montecatini Terme, Italy). Ceramics and composites in extreme environments & for chemical and electrochemical applications: 12th international ceramics congress, part D. Stafa-Zuerich: Trans Tech Pubs. ltd. on behalf of Techna Group, 2011.

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Book chapters on the topic "Electrochemical apparatus"

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Mukoyama, Izumi, Kenichi Myoujin, Takashi Ogihara, Masao Uede, Hironori Ozawa, and Kazunori Ozawa. "Large-Scale Synthesis and Electrochemical Properties of LiAlXMn2-XO4 Powders by Internal Combustion Type Spray Pyrolysis Apparatus Using Gas Burner." In Electroceramics in Japan IX, 251–54. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-411-1.251.

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"Basic Equipment for Electrochemical Measurements." In Inorganic Electrochemistry Theory, Practice and Application, 155–69. 2nd ed. The Royal Society of Chemistry, 2011. http://dx.doi.org/10.1039/bk9781849730716-00155.

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Chapter 4 illustrates briefly how to set up an electrochemical experiment using the proper electrodes, solvents and supporting electrolytes. Examples of representative laboratory-made electrochemical cells are presented to shed light on the requirements needed to choose commercial electrochemical cells and apparatus.
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Herrera Hernández, Héctor, Adriana M. Ruiz Reynoso, Juan C. Trinidad González, Carlos O. González Morán, José G. Miranda Hernández, Araceli Mandujano Ruiz, Jorge Morales Hernández, and Ricardo Orozco Cruz. "Electrochemical Impedance Spectroscopy (EIS): A Review Study of Basic Aspects of the Corrosion Mechanism Applied to Steels." In Electrochemical Impedance Spectroscopy. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94470.

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AC impedance measurements have been applied for over twenty years in electrochemistry and physics to investigate the electrical properties of conductive materials and their interfaces using an external electrical impulse (VOLTAGE, V or CURRENT, I) as driving force. Furthermore, its application has recently appeared to be destined in the Biotechnology field as an effective tool for rapid microbiologic diagnosis of living organism in situ. However, there is no doubt that the electrochemical impedance spectroscopy (EIS) is still one of the most useful techniques around the world for metal corrosion control and its monitoring. Corrosion has long been recognized as one of the most expensive stumbling blocks that concern many industries and government agencies, because it is a steel destructive phenomenon that occurs due to the chemical interaction with aqueous environments and takes place at the interface between metal and electrolyte producing an electrical charge transfer or ion diffusion process. Consequently, it is experimentally possible to determine through the EIS technique the mechanism and control that kinectics of corrosion reactions encounter. First, EIS data is collected through a potentiostat/galvanostat apparatus. After, it is fitted to a mathematical model (i.e. an equivalent electrical circuit, EEC) for its interpretation and analysis, fundamentally seeking a meaningful physical interpretation. Finally, this review reports some basic aspects of the corrosion mechanism applied to steels through the experimental EIS response using Nyquist or Bode plots. Examples are given for different applied electrochemical impedance cases in which steel is under study intentionally exposed to a corrosive aqueous solution by applying a sinusoidal potential at various test conditions.
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Clark, J. B. "Electrochemical assays: the oxygen electrode." In Enzyme Assays, 141–48. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780199638208.003.0005.

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Abstract Until about 45 years ago the methods of choice for the measurement of oxygen consumption or evolution in biological systems were Warburg manometry or chemical techniques. However, with the development of the membrane-covered, complete polarographic oxygen electrode by L. C. Clark (1) and its subsequent modification, commercially available, robust and sensitive oxygen electrodes became available for general use. Prior to this, the use of oxygen polarography had been limited to the experts who could construct their own electrodes and the specialized recording apparatus to go with them. The advent of a means of measuring oxygen instantaneously and continuously dramatically changed approaches to the study of biological respiratory systems and more recently to those enzyme systems which utilize or produce molecular oxygen. Oxygen electrode systems are now available commercially for a range of applications, from macrotechniques for assessing oxygen content in rivers, sewage, or industrial reactors under high pressure and temperature, to micro systems for measuring oxygen content of body fluids, or oxygen utilized by subcellular organelles, e.g. mitochondria.
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Schmickler, Wolfgang. "Nontraditional techniques." In Interfacial Electrochemistry. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195089325.003.0021.

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The traditional electrochemical techniques are based on the measurement of current and potential, and, in the case of liquid electrodes, of the surface tension. While such measurements can be very precise, they give no direct information on the microscopic structure of the electrochemical interface. In this chapter we treat several methods which can provide such information. None of them is endemic to electrochemistry; they are mostly skillful adaptations of techniques developed in other branches of physics and chemistry. The scanning tunneling microscope (STM) is an excellent device to obtain topographic images of an electrode surface . The principal part of this apparatus is a metal tip with a very fine point, which can be moved in all three directions of space with the aid of piezoelectric crystals. All but the very end of the tip is insulated from the solution in order to avoid tip currents due to unwanted electrochemical reactions. The tip is brought very close, up to a few Ångstroms, to the electrode surface. When a potential bias ΔV, usually of the order of a few hundred millivolts, is applied between the electrode and the tip, the electrons can tunnel through the thin intervening layer of solution, and a tunneling current is observed. The situation is illustrated in Fig. 15.2: A potential energy barrier exists between the tip and the substrate. Application of a bias potential shifts the two Fermi levels of the tip and of the substrate. Electrons can tunnel from the metal with the higher Fermi level through the barrier to empty states on the other metal. Roughly speaking, electrons with energies between the two Fermi levels can be transferred. A detailed calculation shows that the current is proportional to the electronic density of states at the Fermi level of the substrate. The tip is moved slowly in the yz direction parallel to the metal surface, and simultaneously the distance x from the electrode is adjusted in such a way that the tunneling current is constant (constant-current mode).
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Maeda, Yasuhisa. "Photoelectrochemical Process on Semiconductor Electrodes." In Revolutionizing Energy Conversion - Photoelectrochemical Technologies and Their Role in Sustainability [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004844.

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For the purpose of conversion of solar energy to chemical energy and water purification, we have investigated the photoelectrochemical process on semiconductor electrodes. As the electrodes, we focused on TiO2, ZnO, α-Fe2O3, and Cu2O. The TiO2 electrode was prepared from the anodic oxidation of Ti. The sintered ZnO and the electrochemically deposited film were used as ZnO electrodes. The α-Fe2O3 and Cu2O electrodes were prepared from the deposited film by pulse electrolysis. The flat-band potential and photocurrent were checked for these semiconductor electrodes in the solution. The HPLC analysis was carried out for intermediates generated due to the photoelectrochemical reaction of organic materials. The performance of the apparatus for water purification was tested.
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Conference papers on the topic "Electrochemical apparatus"

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Mateev, Valentin, Georgi Ivanov, and Iliana Marinova. "Modeling of Thermally Activated Fe2O3 / Li2CO3 Electrochemical Cell." In 2022 22nd International Symposium on Electrical Apparatus and Technologies (SIELA). IEEE, 2022. http://dx.doi.org/10.1109/siela54794.2022.9845690.

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Bingham, Bruce C., Atanas A. Atanasov, and John P. Parmigiani. "The Design and Fabrication of an Electrochemical Machining Test Apparatus." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66299.

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The removal of residual casting material from gating has traditionally been performed by abrasive grinding techniques. However, high amounts of belt wear can occur when working with high strength alloys, especially those typically seen in the aerospace industry. An alternative machining process called electrochemical machining (ECM) uses electrolysis to precisely remove material at high rates. ECM has many advantages over conventional grinding: no tool wear, no induced mechanical or thermal stresses, and high removal rates independent of material hardness or strength. The industrial application of ECM to residual casting material removal can potentially realize large cost savings and decreased component processing time by eliminating belt wear and increasing material removal rates. The approach taken in this work is the design and fabrication of a laboratory apparatus for the purpose of testing the ECM of casting material. Commercial ECM machines, while more powerful, can be excessively large and cost prohibitive when performing an initial feasibility study. Many times these commercial machines are calibrated to mass produce a specific part, and do not have the level of variability desired for laboratory experimentation. The test apparatus presented provides a robust and relatively low cost method of investigating the applicability of ECM to this purpose. The device is comprised of an electrolyte filtration and delivery system, a stable machining enclosure, and a single axis computer controlled tool. The ECM variables that can be adjusted include electrolyte temperature, mass flow rate, applied voltage, tool feed rate, and electrode gap. Process data from these variables is collected via multiple sensors in the machine and provides real-time feedback to users. A universal tool connection and workpiece fixture allows for different experimental setups to be easily tested. From experimentation with this test apparatus, it will be possible to identify optimum methods for the ECM of these residual casting artifacts.
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Pollot, Beth E., Diane M. Testa, and Robert T. T. Gettens. "Design of an apparatus mimicking in vivo coronary cardiovascular dynamics inducing electrochemical fretting of a stent." In 2009 IEEE 35th Annual Northeast Bioengineering Conference. IEEE, 2009. http://dx.doi.org/10.1109/nebc.2009.4967660.

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Azzi, M., E. Bitar-Nehme, and J. E. Klemberg-Sapieha. "Design of New Multifunctional Galling-Corrosion Testing Apparatus." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39404.

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Galling of materials is a severe surface damage characterized by macroscopic material removal when two solid surfaces experience relative sliding under high load. This mode of wear is of particular interest in applications where design constraints require assembly components to slide against each other without adequate lubrication. Examples are high-pressure ball valve with metal-to-metal seal contact, sheet metal forming process and medical/food processing instruments where lubrication is sometimes non-existent due contamination concerns. In addition to sliding at high load, materials in these applications can be exposed to aggressive environments which lead to combined tribological and corrosive degradation phenomena. Progress in this field depends largely on the understanding of the interaction between corrosion and wear processes. In this paper, we describe a new testing instrument capable of testing galling and sliding wear behavior under dry and wet conditions. Design of this instrument is guided by ASTM standards G98 for galling, G99 for pin-on-disk, G133 for ball-on-flat and G199 for tribocorrosion. Galling configuration consists of two concentrically aligned hollow cylindrical specimen loaded along their longitudinal axis with constant load (max 5000 N). The upper specimen is held stationary while the lower specimen is rotated a number of cycles at a selected speed. During the test, the friction torque is measured using special torque/thrust load cell. For the combined galling/corrosion test, the specimen’s contact surface is submerged in an electrolytic solution and three-electrode type electrochemical cell is set-up using the specimens as working electrode. Galling/corrosion tests can be performed under open circuit potential or under controlled potentials. In the first type, the corrosion potential is monitored before, during and after rubbing, whereas in the second type, the corrosion potential and corrosion current are controlled before, during and after rubbing. In addition to galling, the instrument can also be used to conduct pin-on-disk and ball-on-flat tests under dry and wet conditions.
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Guo, Huang, Gulfam Iqbal, and Bruce S. Kang. "In-Situ Measurement of Surface Deformation and Temperature of SOFC Button Cell as a Function of Current Density." In ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2009. http://dx.doi.org/10.1115/fuelcell2009-85031.

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An experimental technique is developed that can measure in-situ surface deformation and monitor surface temperature of a solid oxide fuel cell (SOFC) anode, along with its electrochemical performance. In this research, a NexTech Probostat™ button cell test apparatus is modified and integrated with Sagnac interferometric optical setup and infrared sensor for anode surface deformation and temperature measurement respectively. The cell surface transient temperature is monitored as a function of applied current densities in hydrogen and simulated syngas environment. The surface deformation is also measured over time to estimate the anode material degradation to predict its structural life. The experimental results are useful to validate the SOFC structural and electrochemical models.
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6

Ando, Yuji, and Tadayoshi Tanaka. "Proposal of Simultaneous Production Method of Hydrogen and Hydrogen Peroxide From Water Using Solar Photo-Electrochemistry." In ASME 2003 International Solar Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/isec2003-44203.

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Authors have proposed a new hydrogen production system that simultaneously synthesizes hydrogen and hydrogen peroxide from water by electrochemical reaction. Experimental apparatus of this system is composed of a hydrogen electrode with platinum mesh, a hydrogen peroxide electrode with carbon material and an electrolyte with Nafion®. In this paper, the superiority of this system is outlined. In addition, the experimental results of electrolytic synthesis of hydrogen and hydrogen peroxide from water are reported. Furthermore, the possibility of the system that synthesizes hydrogen and hydrogen peroxide from water by the photochemical reaction using solar radiation is also discussed.
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7

Koraishy, Babar M., Sam Solomon, Jeremy P. Meyers, and Kristin L. Wood. "Parametric Investigations of Direct Methanol Fuel Cell Electrodes Manufactured by Spraying." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54824.

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Manufacture of fuel cell electrodes by the thin-film method was originally proposed by Wilson et al. [1, 2] for proton-exchange membrane fuel cells (PEMFCs). This technology was subsequently utilized for the manufacture of direct methanol fuel cell (DMFC) electrodes by Ren et al. [3]. Key processing steps in the thin-film process are catalyst ink formulation and its application. The catalyst ink is typically composed of supported or unsupported catalysts, binder (ionomer), solvents and additives. Rheological properties of the ink, amount of binder, and choice of solvents are tuned to match the particular ink application process used to fabricate the electrode, as each coating process has its own unique requirements. Besides affecting the coating process, the choice and ratios of these components can significantly affect the electrochemical performance of the electrode. In this study, catalyst inks are designed and investigated for the spraying process, for utilization in the continuous fabrication of DMFC electrodes. For this purpose, the effect of the binder (ionomer) content on the performance of the electrodes is studied in detail. Decal-transfer electrodes are fabricated on a custom-built automated spraying apparatus with individually specified anode and cathode binder contents, and assembled to form a catalyst coated membrane (CCM) type membrane electrode assembly (MEA). These electrodes are rigorously tested to specifically identify their electrochemical performance, catalyst utilization and electrode morphology.
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Hess, Katherine C., William K. Epting, and Shawn Litster. "In Situ Measurements of Through-Plane, Ionic Potential Distributions in Porous Electrodes." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33169.

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We present a novel apparatus for gathering in situ measurements of through-plane, ionic potential distributions in the porous electrodes of a polymer electrolyte membrane (PEM) fuel cell. Our diagnostic method uses a micro-structured electrode scaffold (MES) that is comprised of alternating layers of insulating and sensing materials into which a 100 μm diameter hole is micro-milled and then filled with catalyst ink. Using the MES, we performed a polarization curve experiment where the ionic potential was measured within a 50 μm thick catalyst layer at 8 and 24 μm from membrane. Our results show that there are significant ionic potential variations within the electrode. Such data is valuable in the electrochemical characterization of electrodes and catalysts. The MES potential measurements also provide insight into reaction distributions across the thickness of the electrode, which is valuable in the validation of porous electrode models.
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Chen, Lingen, Dan Xia, Huijun Feng, and Shaojun Xia. "Ecological Optimization for an Endoreversible Chemical Pump With Three Mass Reservoirs." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86250.

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This paper firstly educes an energy-based ecological function (EF) which is a compromise between energy pumping rate (EPR) and dissipation of EPR for an endoreversible chemical pump (CP) cycle. By solving the equations of Euler Lagrange, the fundamental optimization relationships of the EF and coefficient of performance (COP) for the CP cycles with linear mass transfer (MT) law and diffusive MT law are derived. The numerical calculations to analyze the influences of the cycle parameters on the relationship between the EF and COP are provided, and the influence of two different MT laws on the EF and COP characteristic is discussed in detail. The maximum EF of the cycle with the linear MT law is bigger than that with the diffusive MT law. The results obtained in this paper can be applied to design a class of devices, such as photochemical, electrochemical and solid-state apparatus as well as mass exchangers, etc.
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Golozar, M., K. Chien, and T. W. Coyle. "Synthesis of Porous Super-Capacitor Electrodes using the SPPS Deposition Technique." In ITSC2011, edited by B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0869.

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Abstract Electrical double-layer capacitors (EDLCs) owe their large capacitance to high specific surface area carbon-based electrode materials adhered to a current collector via an adhesive. However, recent studies attribute greater electrical energy storage capacity to transition metal oxides/nitrides: a new generation of electrode materials for use in super-capacitors with mixed double-layer and pseudo-capacitive properties. Solution Precursor Plasma Spray (SPPS) deposition is a technique that allows coatings to be fabricated with fine grain sizes, high porosity levels, and high surface area; characteristics ideal for application as transition metal oxide super-capacitor electrodes. A liquid injection apparatus was designed to inject the liquid into the DC-arc plasma and to investigate the effects of various operating parameters such as spray distance, solution concentration and solution flow rate on the chemistry and surface topography of the deposits. Understanding and controlling the evolution of the precursor solution in the DC-arc plasma jet is crucial in producing coatings of the desired structures. DTA/TGA, SEM, XRD, and electrochemical analyses performed to characterize the coatings will be discussed, and the potential of the deposits for use in super-capacitors will be assessed.
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