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

Guo, F, Yang, H, Aguila, B, Al-Enizi, A, Nafady, A, Singh, M, Bansal, V and Ma, S 2018, 'Cobalt nanoparticles incorporated into hollow doped porous carbon capsules as a highly efficient oxygen reduction electrocatalyst', Catalysis Science and Technology, vol. 8, no. 20, pp. 5244-5250.


Document type: Journal Article
Collection: Journal Articles

Title Cobalt nanoparticles incorporated into hollow doped porous carbon capsules as a highly efficient oxygen reduction electrocatalyst
Author(s) Guo, F
Yang, H
Aguila, B
Al-Enizi, A
Nafady, A
Singh, M
Bansal, V
Ma, S
Year 2018
Journal name Catalysis Science and Technology
Volume number 8
Issue number 20
Start page 5244
End page 5250
Total pages 7
Publisher Royal Society of Chemistry
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 (approximate to 1.02 V vs. RHE) and current density (approximate to 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.
Subject Synthesis of Materials
DOI - identifier 10.1039/c8cy01371c
Copyright notice This journal is © The Royal Society of Chemistry 2018
ISSN 2044-4753
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