Facile Preparation of Fe–N–C Oxygen Reduction Electrocatalysts from Metal Organic Frameworks for Zn-Air Battery

Abstract

It is critical to study efficient, stable oxygen reduction reaction (ORR) electrocatalysts due to insufficient stability and expensive price of Pt/C catalysts for Zn-air batteries. Fe-N-C electrocatalysts was synthesized by a facile solvent-green method and the efficiency of Fe-N-C optimized was studied as potential ORR electrocatalysts under alkaline condition. Results indicated that it had excellent ORR activity with E 1/2 of 0.93 V, which was competitive to that of Pt/C-JM under the same conditions. Moreover, the assembled Zn-air battery exhibited discharge potential and charge potential of 1.2 V, 2.32 V at 5 mA cm −2 with high stability, respectively. Overall, all results illustrated that Fe-N-C is an excellent ORR electrocatalyst in the field of metal air battery. Additionally, this work opens a good way to synthesize highly efficient electrocatalysts from metal organic framework and to investigate ORR mechanism of efficient chemical energy to electricity conversion.

Emerging single-atom iron catalysts for advanced catalytic systems

“…92 In the field of energy storage, Fe-SACs play a crucial roles in electrocatalytic reactions including the ORR, HER, OER, NRR, CO 2 RR and H 2 O 2 production. [93][94][95][96][97][98][99][100] 4.1.1.1. ORR process.…”