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Molybdenum carbide promotion on Fe–N-doped carbon nanolayers facilely prepared for enhanced oxygen reduction

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Abstract

The catalysts towards the oxygen reduction reaction (ORR) are the key materials for fuel cells and have stimulated continuous investigations on rational designs. Apart from the popular strategies reported, we demonstrate here a facile method resulting in a nanocomposite composed of molybdenum carbide (Mo2C) nanoparticles embedded and buried in Fe–N-doped carbon nanolayers by directly pyrolyzing the mixture of Fe2(MoO4)3 and dicyandiamide. The underlying Mo2C donates electrons of higher energy to the exterior N-containing carbon nanolayers (NC) and strongly couples with the active sites induced by Fe in the NC layer, leading to significant improvement at half-wave potential with respect to the control sample without Mo2C. The catalyst as a whole exhibits a fairly good ORR performance comparable to commercial Pt/C. Moreover, the method is extremely simplified and the material shows better long-term stability and tolerance to the methanol crossover in comparison with Pt/C.

Graphical abstract: Molybdenum carbide promotion on Fe–N-doped carbon nanolayers facilely prepared for enhanced oxygen reduction

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Publication details

The article was received on 20 Jul 2018, accepted on 04 Nov 2018 and first published on 06 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR05861J
Citation: Nanoscale, 2018, Advance Article
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    Molybdenum carbide promotion on Fe–N-doped carbon nanolayers facilely prepared for enhanced oxygen reduction

    Y. Xu, T. Chen, T. Wang, J. Yang, Y. Zhu and W. Ding, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR05861J

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