Hierarchical porous Fe/Ni-based bifunctional oxygen electrocatalysts for rechargeable zinc-air batteries

被引：26

作者：

Ricciardi, Beatrice ^{[1
]}

Freitas, Williane da Silva ^{[1
]}

Mecheri, Barbara ^{[1
]}

Nisa, Khair Un ^{[1
]}

Montero, Jorge ^{[1
]}

Ficca, Valerio C. A. ^{[2
]}

Placidi, Ernesto ^{[2
]}

Alegre, Cinthia ^{[3
]}

D'Epifanio, Alessandra ^{[1
]}

机构：

[1] Univ Roma Tor Vergata, Dept Chem Sci & Technol, Via Ric Sci, I-00133 Rome, Italy

[2] Sapienza Univ Rome, Dept Phys, Piazzale Aldo Moro 2, I-00185 Rome, Italy

[3] CSIC, Inst Carboquim, Calle Miguel Luesma Castan 4, Zaragoza 50018, Spain

来源：

CARBON | 2024年 / 219卷

关键词：

Platinum-group-metal-free electrocatalysts; Oxygen reduction reaction; Oxygen evolution reaction; Bifunctional catalyst; Fe/Ni-based catalyst; Zinc-air batteries; REDUCTION REACTION ORR; ACTIVE-SITES; CATALYST SYNTHESIS; FACILE SYNTHESIS; DOPED GRAPHENE; NICKEL METAL; THIN-FILMS; FUEL-CELL; EVOLUTION; NITROGEN;

D O I：

10.1016/j.carbon.2023.118781

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Developing sustainable and efficient bifunctional catalysts for oxygen reduction (ORR) and evolution (OER) reactions is challenging for energy conversion and storage. This work proposes a hierarchical carbon matrix decorated with nitrogen atoms (NC) as a support for obtaining high-performance electrocatalysts based on iron and nickel (Fe/Ni@N-C). The effect of different Fe:Ni ratios and the pyrolysis conditions on the catalyst performance were investigated by combining electrochemical tests, N-2-adsorption-desorption, X-ray diffraction, Transmission Electron Microscopy, and X-ray photoelectron spectroscopy. Once optimized the pyrolysis conditions and the Fe:Ni ratio, the Fe/Ni@N-C catalyst showed high bifunctional OER/ORR activity in a three-electrode cell in an alkaline environment (KOH 1 M), with an overall Delta E for the ORR-OER reaction of 0.75 V. Fe/Ni@N-C was assembled in a rechargeable zinc-air battery, resulting in an excellent electrochemical performance in terms of power density (148.5 mWcm(-2)) and durability, outperforming the benchmark Pt/C-RuO2.

引用

页数：12

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