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  • Articles  (120)
  • Springer  (120)
  • Electrical Engineering, Measurement and Control Technology  (120)
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  • Articles  (120)
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  • 1
    Electronic Resource
    Electronic Resource
    On mechanistic differences in methanol oxidation in basic medium induced by the activation of gold electrodes (1987)
    Springer
    Journal of applied electrochemistry 17 (1987), S. 868-876 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A comparative study of methanol oxidation on normal and polycrystalline gold electrodes activated by square wave potential sweep in a basic medium has been performed. The differences in kinetic parameters obtained can be attributed to changes in the bond energy of OH on both forms of gold, whereas the corresponding changes in intensity obtained are the consequence of the change in the surface area induced by the activation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01007825
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  • 2
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    A Comparative DFT and DFT+U Study on Magnetism in Nickel-Doped Wurtzite AlN (2015)
    Springer
    Details
    Publication Date: 2015-08-07
    Print ISSN: 1557-1939
    Electronic ISSN: 1557-1947
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by Springer
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Effect of electron-phonon energy exchange on thermal wave propagation in semiconductors (1998)
    Springer
    Semiconductors 32 (1998), S. 1179-1184 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Nonequilibrium, periodic (in both space and time) temperature distributions in the electron and phonon subsystems of a geometrically bounded semiconductor (thermal waves) are calculated self-consistently with the electron-phonon interaction taken into account. Modulated laser radiation, which is converted into heat on the surface of the sample, serves as the external source of energetic nonequilibrium. The dependence of the amplitude and phase of the electron and phonon temperatures on the modulation frequency is analyzed for different sample thicknesses and a number of characteristic parameters of the problem. It is shown that by varying the modulation frequency over a wide range (up to frequencies of the electron-phonon energy exchange) it is possible to generate thermal waves in the electron and phonon subsystems separately.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1187587
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  • 4
    Electronic Resource
    Electronic Resource
    Spectral mimicry: A method of synthesizing matching time series with different Fourier spectra (1999)
    Springer
    Circuits, systems and signal processing 18 (1999), S. 431-442 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Given a stationary time seriesX and another stationary time seriesY (with a different power spectral density), we describe an algorithm for constructing a stationary time series Z that contains exactly the same values asX permuted in an order such that the power spectral density ofZ closely resembles that ofY. We call this methodspectral mimicry. We prove (under certain restrictions) that, if the univariate cumulative distribution function (CDF) ofX is identical to the CDF ofY, then the power spectral density ofZ equals the power spectral density ofY. We also show, for a class of examples, that when the CDFs ofX andY differ modestly, the power spectral density ofZ closely approximates the power spectral density ofY. The algorithm, developed to design an experiment in microbial population dynamics, has a variety of other applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01200792
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  • 5
    Electronic Resource
    Electronic Resource
    Study of the electrooxidation of 1,3-propanediol on a gold electrode in basic medium (1988)
    Springer
    Journal of applied electrochemistry 18 (1988), S. 538-545 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A study of the mechanism of electrooxidation of 1,3-propanediol on a gold electrode in basic medium has been made. The kinetic parameters measured, together with other experimental data, allow the formulation of a mechanism in which both 1,3-propanediol and OH− ions adsorb on the gold surface and the rate determining step is an interaction between both coverages with the result of the formation of an adsorbed radical, whose oxidation leads to the formation of 3-hydroxypropanoic acid which has been identified by nuclear magnetic resonance (NMR).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01022248
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  • 6
    Electronic Resource
    Electronic Resource
    Correlation between specific adsorption and corrosion inhibition. Adsorption of 1-butylpyridinium bromide (1982)
    Springer
    Journal of applied electrochemistry 12 (1982), S. 405-410 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A correlation between specific adsorption and corrosion inhibition was made on the basis of calculations of the degree of coverage at zero charge on the electrode and corrosion rates. 1-butylpyridinium bromide (BPB) was choosen as a model compound for these studies. The electrical double-layer parameters were determined at constant charge on a mercury electrode, from values of the interfacial capacity and surface tension obtained experimentally from aqueous solutions of BPB at 25° C. The characteristics of the salt as a corrosion inhibitor were studied through Tafel plots and weight-loss measurements using mild steel plates immersed in H2SO4 solutions. Analysis of the results lead to the conclusion that the salt adsorbs intensely on the metal surface, forming a complete monolayer of BP+ ions in 0.1 mol dm−3 solutions and multilayers for higher concentrations. The results of this work indicate that for high coverages there is a good correlation between the amount of BP+ specifically adsorbed on mercury and the inhibition of the corrosion process on mild steel. That type of compound acts mainly as an anodic inhibitor in acid media by the formation of protective layers on the metal surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00610481
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of temperature on the water electrolysis reactions on nickel and nickel-based codeposits (1988)
    Springer
    Journal of applied electrochemistry 18 (1988), S. 894-898 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Usually, an increase in the temperature of operation leads to a reduction in the voltage of operation of commercial water electrolyzers. The present work analyzes this effect in connection with the overpotential of the hydrogen and oxygen evolution reactions on electrodeposited nickel and some nickel-based codeposits which under normal operational conditions have shown good electrocatalytic characteristics. Results on pure nickel are also presented for comparison. A pressure chamber, adequate for electrochemical studies at high temperatures and pressures is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01016047
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  • 8
    Electronic Resource
    Electronic Resource
    A synergistic effect between zinc salt and phosphonic acid for corrosion inhibition of a carbon steel (1996)
    Springer
    Journal of applied electrochemistry 26 (1996), S. 1259-1265 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract This work is devoted to the corrosion inhibition of a carbon steel by a zinc salt/phosphonic acid association. Steady-state current-voltage curves and electrochemical impedance measurements carried out in the presence of each compound and for the mixture show a synergistic effect between the two molecules. The concentrations of the compounds in the mixture were lower than the concentrations used for each compound separately. Phosphonic acid was observed to act as an anodic inhibitor whereas cathodic action was shown for the zinc chloride. Electrochemical measurements and surface analysis (XPS and reflection-adsorption spectroscopy at grazing incidence) showed that the synergistic effect afforded by the mixture was attributable to the reaction of the phosphonic acid with the zinc salt. The inhibitor film acts as a protective layer impermeable to ionic or molecular diffusion. The film is very thin and homogeneous in composition. A chemical structure of the film is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249928
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  • 9
    Electronic Resource
    Electronic Resource
    Electrodeposition of gold in ammoniacal medium: influence of substrate and temperature (1996)
    Springer
    Journal of applied electrochemistry 26 (1996), S. 1287-1294 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Gold electrodeposition was studied on glassy carbon and platinum electrodes from Au(1) ammoniacal solution. The current transients obtained from potential step perturbations, show a typical metallic nucleation growth controlled by diffusion. This process is influenced by adsorption of the different chemical species on the surface. Change in the type of nucleation and morphology of the deposit was observed when the nature of the substrate was changed. It was also found that increase in temperature produces modification of the nucleation mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249932
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  • 10
    Electronic Resource
    Electronic Resource
    Development and electrochemical studies of gas diffusion electrodes for polymer electrolyte fuel cells (1996)
    Springer
    Journal of applied electrochemistry 26 (1996), S. 297-304 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrochemical studies on low catalyst loading gas diffusion electrodes for polymer electrolyte fuel cells are reported. The best performance is obtained with an electrode formed from 20 wt% Pt/C, 0.4 mg Pt cm−2 and 1.1 mg Nafion® cm−2 in the catalyst layer and 15% PTFE in a diffusion layer of 50 µm thickness, for both the cathode and the anode. However, it is also observed that the platinum requirement can be diminished to values close to 0.2 mg Pt cm−2 in the cathode and 0.1 mg pt cm−2 in the anode, without appreciably affecting the good characteristics of the fuel cell response. The experimental fuel cell data were analysed using theoretical models of the electrode structure and of the fuel cell system. It is seen that most of the electrode systems present limiting currents and some also show linear diffusion components arising from diffusion limitations in the gas channels and/or in the thin film of electrolyte covering the catalyst particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00242099
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