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Homework Help: Using Tafel curves

  1. Jan 19, 2010 #1
    1. The problem statement, all variables and given/known data

    After plotting log(I/A) vs E/mV, you get a tafel curve. calculate the exchange current density, Io, the cathodic transfer coefficient ac and the rate constant of the reaction k.

    2. Relevant equations

    3. The attempt at a solution

    Is it simply, the exchange current density is e(y intercept)

    cathodic transfer coeffiecent, the gradient of the line

    And then putting those two into the following quation to get K

    lnI = lnIo + (1-ac) x nF/RT

    Thanks for your help!
  2. jcsd
  3. Jan 19, 2010 #2
    I think it's ln(I/A) not log, so it's not actually a tafel curve it's a straight line.

    Does this make it work?
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