Open-circuit-decay plot

In fact, such a plateau on the open-circuit-decay plot is a good indication of significant coverage by adsorbed intermediates. 

Thus, the Tafel slope can be determined from the slope of the open-circuit decay curve, once the parameter x is known. The latter is found by trial and error, as the number that gives the best straight line in a setnilogarithmic plot of q versus ln(t + x). This line must be consistent with the plot of q versus In t at long times, when x t. 

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