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  • 1
    Electronic Resource
    Electronic Resource
    Electrowinning of zinc from alkaline solutions at high current densities (1990)
    Springer
    Journal of applied electrochemistry 20 (1990), S. 163-165 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012487
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  • 2
    Electronic Resource
    Electronic Resource
    Hydrogen evolution in alkaline water on cobalt electrodeposits prepared from baths containing different anions (1993)
    Springer
    Journal of applied electrochemistry 23 (1993), S. 985-990 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrolytic cobalt deposits, as electrocatalytic materials, were prepared from baths containing chloride, sulphate or acetate. Electrodeposition was conducted at 200 A m−2 with or without oxygen bubbling at the cathode. The hydrogen evolution reaction (h.e.r.) on the cobalt electrodes was performed in 30 wt % KOH at 25, 40, 50, 60 and 70 °C. Without oxygen bubbling during deposition, the cobalt electrodes prepared from the acetate bath gave superior performance for h.e.r. than electrodes deposited from the other baths. With oxygen bubbling, however, the lowest h.e.r. over-potential was obtained on the cobalt prepared from the chloride bath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266119
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  • 3
    Electronic Resource
    Electronic Resource
    Active surface area in oxide electrodes by overpotential deposited oxygen species for the oxygen evolution reaction (1996)
    Springer
    Journal of applied electrochemistry 26 (1996), S. 515-521 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electrochemical active surface area at oxide electrodes of Pt and electrodeposited Ni, Co and Ni20Co80 alloys was evaluated in 5m KOH solutions based on the charge for electrochemical desorption of a monolayer of overpotential deposited oxygen (OPD O) species. Thein situ technique empllyed for the charge measurement involves galvanostatic charging (OPD O) adsorption), followed by simple discharging (OPD O desorption) experiments. It is observed that surface area estimated by this new technique for the oxidized surfaces of the metals studied here are consistent with those from a.c. impedance spectroscopy. The activity of the metal towards the oxygen evolution reaction (OER) is also discussed in terms of their active surface area estimated in this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021975
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  • 4
    Electronic Resource
    Electronic Resource
    The effects of metallic impurities and 2-butyne-1,4-diol on zinc electrowinning from chloride solutions (1988)
    Springer
    Journal of applied electrochemistry 18 (1988), S. 54-61 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Zinc electrowinning tests from acidic chloride solutions showed that metallic impurities can be classified in the following order of detrimental effect on current efficiency: Sb〉Co, Ni〉Cu. This effect increased with higher HCl concentrations. Analysis of the impurity content of the zinc deposits showed the regular codeposition of Cu and the anomalous codeposition of Ni and Co. The use of 2-butyne-1,4-diol (0.86 g l−1) was proven to be beneficial in the presence of Sb and particularly Ni. Both current efficiency and zinc deposit morphology were improved. The additive acted by selectively slowing the codeposition of the impurities with zinc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01016205
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of nickel in zinc electrowinning under periodical reverse current (1990)
    Springer
    Journal of applied electrochemistry 20 (1990), S. 630-634 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The effects of nickel impurities were investigated during the electrowinning of zinc in acidic media using periodical reverse current (PRC) along with anodic potential current response and cathodic current efficiency. The chemical and structural characteristics of the cathode deposit were also determined using nickel concentrations of 3, 5 and 10 mg l−1 in sulphuric acid (200 gl−1 H2SO4) containing 60 gl−1 of zinc. The cathodic current efficiency drop caused by nickel was less detrimental in PRC than DC. It was found that the morphology of the deposit plays an important role in the redissolution process caused by impurities. The levelling effect caused by PRC decreases the rate of zinc redissolution, which results in an increase of current efficiency. However for concentrations equal to or greater than 10 mgl−1, the levelling effect caused by PRC is no longer dominant. On the anode nickel did not affect the overpotential of the lead-silver electrode in PRC or DC modes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01008874
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  • 6
    Electronic Resource
    Electronic Resource
    Electrodeposition of Ni-transition alloys for the oxygen evolution reaction (1991)
    Springer
    Journal of applied electrochemistry 21 (1991), S. 55-59 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The oxygen evolution reaction (OER) is the anodic reaction in several industrial electrolytic processes. The objective of this work was to develop a new electrocatalytic material for long-lasting and economical high performance electrodes. New electrodes were prepared by electrodeposition of nickel, nickel-ruthenium and nickel-iridium alloys. They were then activated by anodic polarization at 100 mA cm−2 to form an oxide layer. The electrocatalytic activity was characterized for the OER in 5M KOH solution. The results show that nickel-iridium alloys provide greater electrocatalytic activity for the OER and better corrosion resistance than nickel-ruthenium in alkaline solution. The effects of transition elements on improving the performance of the nickel electrode are then discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01103830
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of hydrogen evolution on cobalt electrodeposits in water electrolysis (1992)
    Springer
    Journal of applied electrochemistry 22 (1992), S. 1135-1141 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The hydrogen evolution reaction (HER) on cobalt electrodes has been investigated in both alkaline (30 wt% KOH) and acid (1m H2SO4) media at 25°C. The electrocatalytic cobalt materials were produced under different electrodeposition conditions, namely deposition in the absence or presence of bubbling oxygen or nitrogen gas with two gas flow rates (80 and 230 ml min−1) and at different current densities (50–800 A m−2) and deposition in a cobalt powder-containing bath. It has been shown that the electrocatalytic behaviour of the cobalt deposits can be significantly affected by deposition current density via a change of surface area of the cobalt deposits. A considerable HER overpotential decrease (up to 150mV) has been achieved on the highly porous and active cobalt electrodes deposited in the presence of bubbling oxygen and chloride ions in deposition solution. However, the HER overpotential was increased on the cobalt electrodes deposited with bubbling nitrogen in the bath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297414
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  • 8
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    Unknown
    Comments on ’’Electrochemical effects as the source of emf in metal(1) ‐polymer‐metal(2)’’ (1979)
    American Institute of Physics
    Details
    Publication Date: 1979-05-01
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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