Direct urea fuel cell (DUFC) has caused a lot of attention in recent years because of simple availability of urea as fuel and high hydrogen storage in this compound. DUFC usually uses oxygen as the oxidant and the platinum catalysts as the cathode catalyst. In our previous research, O2 even air can in situ produce H2O2 under the action of Pd catalyst. In this experiment, we developed a unique DUFC, which used H2O2 as the oxidant and Pd/C as the cathode catalyst. The results demonstrate that when H2O2 served as the oxidant, the open circuit voltage and maximum power density of DUFC are much higher than those of DUFC with O2 as the oxidant. Therefore, if O2 or air can be in situ converted to H2O2, the performance of the fuel cell can be greatly improved.
Fan, Z., Kwon, Y. H., Yang, X., Xu, W., & Wu, Z. (2017). In-situ Production of Hydrogen Peroxide as Oxidant for Direct Urea Fuel Cell. In Energy Procedia (Vol. 105, pp. 1858–1863). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2017.03.544