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Issue 8, 2018
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SiO2-protected shell mediated templating synthesis of Fe–N-doped carbon nanofibers and their enhanced oxygen reduction reaction performance

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Abstract

Electrocatalytic reduction of oxygen plays a crucial role in many energy storage and conversion devices. Currently, the development of high-performance carbon-based non-precious-metal (NPM) oxygen reduction reaction (ORR) catalysts in acidic media still remains a great challenge. Herein, we report a highly active meso/microporous Fe–N-doped carbon nanofiber (Fe–N-CNF) catalyst prepared via a SiO2-protected shell mediated template method. The SiO2-protected shell not only restricts the free migration of iron species but also traps volatile gaseous substances during the pyrolysis process at high temperature, thus leading to a simultaneous optimization of both the surface functionalities and porous structures of the Fe–N-CNF catalysts. Compared to catalysts prepared without a SiO2-protected shell, the Fe–N-CNF catalysts exhibit a much enhanced ORR activity in an acidic medium, along with a superior long-term stability.

Graphical abstract: SiO2-protected shell mediated templating synthesis of Fe–N-doped carbon nanofibers and their enhanced oxygen reduction reaction performance

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Publication details

The article was received on 05 Mar 2018, accepted on 29 May 2018 and first published on 29 May 2018


Article type: Paper
DOI: 10.1039/C8EE00673C
Citation: Energy Environ. Sci., 2018,11, 2208-2215
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    SiO2-protected shell mediated templating synthesis of Fe–N-doped carbon nanofibers and their enhanced oxygen reduction reaction performance

    B. Hu, Z. Wu, S. Chu, H. Zhu, H. Liang, J. Zhang and S. Yu, Energy Environ. Sci., 2018, 11, 2208
    DOI: 10.1039/C8EE00673C

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