In this work, we propose to create the cathode potential by introducing a redox couple to the cathode while to use hydrogen peroxide to chemically charge to redox ions. The redox cathode not only completely eliminates the mixed-potential problem associated with the direct reduction of hydrogen peroxide, but also enables a faster cathodic electrochemical kinetics even without noble metal catalysts [4]. It has been demonstrated that the direct ethanol fuel cell with a redox couple of V(IV)/V(V) yields a peak power density of 450 mW cm-2 at 60oC, which is 87.5% higher than that of the conventional cell with direct reduction of hydrogen peroxide [5].
References
[2] L. An, T.S. Zhao, X.H. Yan, X.L. Zhou, P. Tan, Science Bulletin 60 (2015) 55-64.
[3] L. An, T.S. Zhao, Z.H. Chai, L. Zeng, P. Tan. Int. J. Hydrogen Energy 39 (2014) 7407-7416.
[4] L. An, T.S. Zhao, X.L. Zhou, L. Wei, X.H. Yan, RSC Adv. 4 (2014) 65031-65034.
[5] L. An, T.S. Zhao, X.L. Zhou, X.H. Yan, C.Y. Jung, J. Power Sources 275 (2015) 831-834.