Abstract

Nowadays, developing low-cost, high-performance metal-free catalysts of full cells is becoming increasingly prevalent. In this work, P-doped carbon is prepared through a one-step pyrolysis and double activation methods. When the amount of NaH2PO2 is 0.4 g, the obtained catalyst shows three-dimensional nanostructure porous and exhibits the better electrochemical performance, including more positive onset potential (−0.04 V), the largest limiting current (−5.83 mAcm−2 at 0.6 V), and the best stability. The obtained catalyst also has large surface area (943 m2g−1). Moreover, the active sites and defects of the carbon material formed by the synergistic effect between NaH2PO2 and ZnCl2 improved the electrochemical performance. The facile preparation and excellent electrochemical performance shows that the proposed process is a promising candidate for full cell catalysts.

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