A typical experiment to determine the rate of O2 reaction with Re MBH. (A) The current vs. time trace (black) with the fit to film loss/anaerobic inactivation (gray). (B) The corrected data (black), with the fit to the initial attack by O2 (gray). Experimental conditions were pH 5.5, 10° C, +0.192 V, electrode rotation rate = 4,500 rpm.