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Tafel kinetics

An article about using Tafel kinetics to evaluate an electrode material. The essay is to be 1 pages with three to five sources, with in-text citations and a reference page.the exchange current densityobtained by extrapolation to zero over potential depends on the Tafel-slope value used for extrapolation the author is able to choose his variables. This is because variations in Tafel-slope used forextrapolation could result in large deviations to occur in the intrinsic exchange current density for ORR. The amount of temperature in the oxygen reduction reaction has to be considered since temperatures above 70o C are difficult to operate in.In this experiment, the set up made sure transport losses are minimum. For that to happen, the H+ was transported through the membrane and electrode whereas oxygen is transported through diffuse medium and electrode this is at an operational workplace of 1o00%RH and pure oxygen. By reducing the cathode platinum loading and the oxygen partial pressure in this experiment, low cell potential is attained.The experiment was a not a success due to the many inconsistencies in the results. Despite of that, it was able to demonstrate the increased performance of the coverage dependent kinetics could be used instead of constant Tafel-slope kinetics for performance in real life experiments. Details of how that will work are outside the scope of the

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