Issue 24, 2022

One-step synthesis of CeFeO3 nanoparticles on porous nanocarbon frameworks derived from ZIF-8 for a boosted oxygen reduction reaction in pH universal electrolytes

Abstract

Perovskite oxide based electrocatalysts hold great promise as potential alternatives to platinum-based electrocatalysts for the oxygen reduction reaction (ORR), and thus have attracted tremendous research interest. Nevertheless, exploring high-performance ORR catalysts to improve pivotal reaction kinetics particularly in an acidic environment remains a great challenge. Herein, an N-doped porous nanocarbon framework supported perovskite CeFeO3 nanoparticle catalyst (Ce–Fe/NC) is fabricated from a predesigned Ce–Fe-doped ZIF-8 by a facile one-step route. The prepared catalyst displays a dodecahedral morphology with a large number of mesopores, which facilitate confining the aggregation of the CeFeO3 nanoparticles and promoting mass transport in the electrochemical process. Meanwhile, the introduced oxygen vacancies play a role in manipulating the local structure of the Fe active sites in CeFeO3, and boost their ORR performance. Impressively, the Ce–Fe/NC catalyst shows outstanding ORR half-wave potentials in pH universal electrolytes (0.913 V in alkaline and 0.791 V in acidic electrolytes), as well as good durability. A zinc–air battery utilizing the Ce–Fe/NC material as the air electrode offers an excellent specific capacity of 804 mA h g−1 and a long-term stability of 105 h in galvanostatic charge–discharge. This work provides a promise of non-precious-metal electrocatalysts with good prospects for realistic applications in zinc–air batteries and fuel cells.

Graphical abstract: One-step synthesis of CeFeO3 nanoparticles on porous nanocarbon frameworks derived from ZIF-8 for a boosted oxygen reduction reaction in pH universal electrolytes

Supplementary files

Article information

Article type
Paper
Submitted
06 Apr 2022
Accepted
11 May 2022
First published
12 May 2022

J. Mater. Chem. A, 2022,10, 13013-13020

One-step synthesis of CeFeO3 nanoparticles on porous nanocarbon frameworks derived from ZIF-8 for a boosted oxygen reduction reaction in pH universal electrolytes

Z. Zhang, H. Zhang, Y. Hou, P. Liu, X. Hao, Y. Liu, B. Xu and J. Guo, J. Mater. Chem. A, 2022, 10, 13013 DOI: 10.1039/D2TA02764J

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