To confirm the nature of the reduced species formed on the Zn surface (as observed by RRDE experiment), electron paramagnetic resonance (EPR) spectroscopy study is carried out. A 5membered cyclic nitrone called DMPO (5, 5-Dimethyl-1-Pyrroline-N-Oxide) is a widely used radical trapping agent, that interacts with oxygen radicals to produce nitroxide spin adduct. The sextet signal obtained in EPR (Fig. ) illustrates the reaction of DMPO with the peroxide radical, resulting in the formation of the adduct, DMPO-O2˙¯ (Fig. ). This multiplet in EPR arises from the interaction between the unpaired electron spins and nearby magnetic nuclei, leading to hyperfine splitting (2I+1, where I represent the nuclear spin value). In this case, sextet is the resultant hyperfine splitting due to interaction between two kinds of nuclei [Nitrogen (N) atom (I=1) and hydrogen (H) atom (I=1/2)]. The N nucleus results in 3 lines [coupling constant a(N), 1.83 mT] and each of them splits into two lines due to the H atom presence in β position.