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  • current distribution  (1)
  • direct methanol  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Material aspects of the liquid feed direct methanol fuel cell (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 1389-1397 
    Details
    ISSN: 1572-8838
    Keywords: direct methanol ; electrocatalysis ; electrochemical ; fuel cell ; platinum ruthenium catalyst ; polymer electrolyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A study of a small scale Liquid Feed Direct Methanol Fuel Cell (LFDMFC), based on solid polymer electrolyte membrane, is reported. Two flow cell designs, one with a parallel flow channel arrangement and the other with a spot design of flow bed, are used. The structure of the DMFC comprises a composite of two porous electrocatalytic electrodes; Pt–Ru–carbon catalyst anode and Pt–carbon catalyst cathode, on either side of a solid polymer electrolyte (SPE) membrane. The performance of three Pt–Ru catalysts is compared. The influence of the degree of Teflon loading on the electrode structure is also reported. The effect of the following parameters: cell temperature, oxygen gas or air pressure, methanol liquid flow rate and methanol concentration on the power performance is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003460110286
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A study of current distribution in a DEM cell during bromate formation (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 259-268 
    Details
    ISSN: 1572-8838
    Keywords: bromate ; anodic oxidation ; bromine ; DEM cell ; current distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The anodic oxidation of potassium bromide to potassium bromate is performed in an undivided cell with hydrogen evolution the major reaction at the counter electrode. The cell used is a dished electrode membrane (DEM) cell. Current density distribution, measured using a segmented electrode, shows a variation in the two principle dimensions; along the length of the electrode and over the width of the electrode. Current densities are highest at the electrolyte flow inlet and also exhibit a localized maximum along the electrode length. The variation in current density is due to the influence of electrolytic gas evolution on the effective electrolyte conductivity and mass transport and also due to the change in shape of the dished electrode, which influences mass transport, electrical potential field and flow at the cell inlet and exit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003255430866
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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