期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 48, 期 33, 页码 12333-12341出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.12.099
关键词
ZIF-8; M-N-C; Electrocatalyst; Oxygen reduction reaction
The development of non-precious metal catalysts to replace scarce and expensive Pt-based catalysts is crucial for oxygen reduction reactions. Zeolitic-imidazolate-framework-derived (ZIF-derived) iron-based electrocatalysts show promising prospects.
The development of non-precious metal catalysts to replace scarce and expensive Pt-based catalysts is critical for oxygen reduction reactions (ORR), where zeolitic-imidazolate-framework-derived (ZIF-derived) iron-based electrocatalysts hold a promising prospect. Herein, Fe3O4 was used as Fe source, and ZIF-8 was used as C and N source to prepare Fe-NC catalysts. Specifically, the half-wave potential (E1/2) of the Fe-NC reached 0.90 V, which was higher than commercial Pt/C catalysts (0.87 V), and the overpotential of OER reached 327 mV. In addition, the power density tested in Zn-air batteries upped to 129.59 mW cm-2, surpassing that of the Pt/C (108.93 mW cm-2). The superior performance was attributed to the effective introduction of Fe, the large specific surface area (851.6 m2 g-1), relatively regular porous structure and the high degree of graphitization. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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