Data for Electron paramagnetic resonance for the detection of electrochemically generated hydroxyl radicals : issues associated with electrochemical oxidation of the spin trap

Increasing the potential into the water oxidation region, surprisingly, shows a lower DMPO-OH· concentration than when the potential is in the DMPO oxidation region. This behavior is attributed to further oxidation of DMPO-OH·, production of fouling products on the electrode surface, and bubble formation. Radical scavengers (ethanol) and other spin traps, here N-tert-butyl-α-phenylnitrone, α-(4-pyridyl N-oxide)-N-tert-butylnitrone, and 2-methyl-2-nitrosopropane dimer, also show electrochemical oxidation signals less positive than that of water on a BDD electrode.

Such behavior also complicates their use for the intended application.<br><br>he file has been divided into two sections: 1 - Main Article Data Figure 1, Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6 2 - Supporting Information Data Figure S1, Figure S2, Figure S3, Figure S4, Figure S5, Figure S6, Figure S8 and Figure S9