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. Author manuscript; available in PMC: 2020 Mar 9.
Published in final edited form as: Chem Eng J. 2017 Dec 30;338:709–718. doi: 10.1016/j.cej.2017.12.152

Fig. 3.

Fig. 3

The pink color shows the diffusion process of OH− generated from graphite rod cathode vicinity, which also shows the diffusion process of H2O2 molecules generated from cathode vicinity.