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Issue 7, 2017
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One-step preparation of N-doped graphitic layer-encased cobalt/iron carbide nanoparticles derived from cross-linked polyphthalocyanines as highly active electrocatalysts towards the oxygen reduction reaction

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Abstract

The development of low-cost and structure-controlled precursors has become one of the crucial issues in the improvement of pyrolyzed carbonaceous materials for the oxygen reduction reaction. In this work, a facile and interchangeable cross-linking process has been developed to synthesize polyphthalocyanines with different cross-linking degrees. After the pyrolysis treatment, the cross-linked polyphthalocyanine generated N-doped carbon-encased metal nanoparticle materials. During the pyrolysis treatment, the cross-linked structure of polyphthalocyanine can effectively restrain the aggregation of the metal core and significantly increase the amount of active N species in the pyrolyzed carbon shell. Different from the pyrolyzed pure phthalocyanine, the pyrolyzed cross-linked polyphthalocyanine electrocatalyst shows excellent electroactivity via a 4-electron pathway along with remarkable stability and good methanol tolerance. In addition, the unraveling of the cross-linking degree effect also provides guidance for future design of more efficient non-precious metal catalysts for oxygen reduction and other electrochemical applications.

Graphical abstract: One-step preparation of N-doped graphitic layer-encased cobalt/iron carbide nanoparticles derived from cross-linked polyphthalocyanines as highly active electrocatalysts towards the oxygen reduction reaction

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Publication details

The article was received on 27 Oct 2016, accepted on 25 Feb 2017 and first published on 27 Feb 2017


Article type: Paper
DOI: 10.1039/C6CY02266A
Citation: Catal. Sci. Technol., 2017,7, 1529-1536
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    One-step preparation of N-doped graphitic layer-encased cobalt/iron carbide nanoparticles derived from cross-linked polyphthalocyanines as highly active electrocatalysts towards the oxygen reduction reaction

    Z. Zhang, S. Yang, M. Dou, J. Ji and F. Wang, Catal. Sci. Technol., 2017, 7, 1529
    DOI: 10.1039/C6CY02266A

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