Figure 5.

(A) Background-corrected time-dependent $ln\left(\frac{I}{I_0}\right)$ for 6CFL fluorescence in the presence of an aqueous H₂O₂ solution. The initial rate is approximated by fitting the first several data points (t < 15 s) with Equation (6), a linear function with a slope of −k^app. (B) Argon-subtracted time-dependent $ln\left(\frac{I}{I_0}\right)$ for 6CFL fluorescence decay during the ORR with N-TaTiOx/C on ITO. The working electrode potential was maintained at 0.3 V vs. reversible hydrogen electrode (RHE). The initial rate is approximated by fitting the first several data points (t < 25 s) with Equation (6), a linear function with a slope of −k^app.