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Issue 20, 2018
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Cobalt nanoparticles incorporated into hollow doped porous carbon capsules as a highly efficient oxygen reduction electrocatalyst

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Abstract

Platinum-based materials have been the dominant and best electrocatalysts for promoting the oxygen reduction reaction (ORR). However, going beyond state-of-the-art catalysts remains a great challenge. Recently, nanostructured composites of conductive carbons and earth-abundant metals have emerged as promising electrocatalysts. Herein, we report a facile and practical approach for the synthesis of cobalt nanoparticles embedded into hollow nitrogen/cobalt-doped porous carbon capsules (Co@NPCC). The fabrication of this material was achieved via the thermal decomposition of sacrificial metal–organic framework nanocrystals coated with a metal–tannic acid coordination polymer shell, upon pyrolysis, which delivers zerovalent cobalt nanoparticles embedded in the walls of hollow capsules. Co@NPCC proved to be a superb catalyst for the electrochemical ORR, showing a highly positive onset potential (∼1.02 V vs. RHE) and current density (∼5.2 mA cm−2) in 0.1 M KOH electrolyte. These values are in excellent agreement with those reported for the state-of-the-art Pt/C catalyst. Significantly, materials produced via this approach can be manufactured on a large scale, thereby providing access to next-generation catalysts for important electrochemical processes.

Graphical abstract: Cobalt nanoparticles incorporated into hollow doped porous carbon capsules as a highly efficient oxygen reduction electrocatalyst

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Publication details

The article was received on 02 Jul 2018, accepted on 10 Sep 2018 and first published on 10 Sep 2018


Article type: Paper
DOI: 10.1039/C8CY01371C
Citation: Catal. Sci. Technol., 2018,8, 5244-5250
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    Cobalt nanoparticles incorporated into hollow doped porous carbon capsules as a highly efficient oxygen reduction electrocatalyst

    F. Guo, H. Yang, B. Aguila, A. M. Al-Enizi, A. Nafady, M. Singh, V. Bansal and S. Ma, Catal. Sci. Technol., 2018, 8, 5244
    DOI: 10.1039/C8CY01371C

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