I am doing a catalytic study on my Pt nanoparticles. My experiment set-up is a three-electrode cell with sulfuric acid as electrolyte for methanol electrooxidation reaction. Now, i want to calculate the apparent activation energy and for that I need to get the voltammograms at various temperatures (eg. between 30oC - 60oC). After that I have to plot log i(current density, mA/cm2) vs 1000/T(in K) at a certain potential (eg. 0.6V) and then from the slope i can calculate the activation energy (this is based from a paper i read). I am having some doubts as to how to settle with the values of i because I`m kind of confused with the conversions and units like if I "log" the unit what will happen to "mA/cm2" and the like. Also, should I use the actual current density reading from the CV plot as is or do i need to consider other things? anyone with experience on this area, please kindly share some insights. Thanks.