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Cobalt ions-coordinated self-assembly synthesis of nitrogen-doped ordered mesoporous carbon nanosheets for efficiently catalyzing oxygen reduction

Abstract

The design and synthesis of a promising porous carbon-based electrocatalyst with ordered and uninterrupted porous structure for oxygen reduction reaction (ORR) is still a significant challenge. Herein, an efficient catalyst, cobalt-embedded nitrogen-doped ordered mesoporous carbon nanosheets (Co/N-OMCNS) are successfully prepared through a two-step procedure (cobalt ions-coordinated self-assembly and carbonization process) using 3-aminophenol as a nitrogen source, cobalt acetate as a cobalt source and Pluronic F127 as a mesoporous template. This work indicates that the formation of two dimensional nanosheet structure is directly related to the extent of the cobalt ions coordination interaction. Moreover, the critical roles of pyrolysis temperature on nitrogen doping and ORR catalytic activity are also investigated. Benefiting from high surface area and graphitic degree, high contents of graphitic N and pyridinic N, ordered interconnected mesoporous carbon framework, as well as synergetic interaction between cobalt nanoparticles and protective nitrogen doped graphitic carbon layer, the resultant optimal catalyst Co/N-OMCNS-800 (pyrolyzed at 800 °C) exhibits comparable ORR catalytic activity relative to Pt/C, superior tolerance to methanol crossover and stability.

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Supplementary files

Publication details

The article was received on 17 Jul 2017, accepted on 11 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR05208A
Citation: Nanoscale, 2017, Accepted Manuscript
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    Cobalt ions-coordinated self-assembly synthesis of nitrogen-doped ordered mesoporous carbon nanosheets for efficiently catalyzing oxygen reduction

    H. Wang, W. Wang, M. Asif, Y. Yu, Z. Wang, J. Wang, H. Liu and J. Xiao, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05208A

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