The relationship between peak current (ip) and scan rate?

01 January 1970 0 3K Report

I understand that plotting ip vs v^(1/2) and v can reveal if it is a diffusion controlled reaction or surface reaction. However, I got an interesting relationship (an irreversible EC process, or EEC) that ip shows a linear correlation with log(v) (which is usually Ep instead of ip), while the Ep remains constant. Anyone has similar findings or a reasonable explanation?

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