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Cobalt/molybdenum carbide@N-doped carbon as bifunctional electrocatalysts for hydrogen and oxygen evolution reactions

Abstract

The development of cost-effective and highly active electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) from overall water splitting is still a big challenge. Herein, we design and construct a composite architecture that is composed of nitrogen-doped carbon encapsulating cobalt and molybdenum carbide nanoparticles (CoxMoy@NC). Benefiting from synergistic cooperation between each component, the CoxMoy@NC presents the excellent performance towards both the HER and the OER catalysis in alkaline medium. The optimized electrocatalyst is found to be Co4Mo2@NC, which only requires the relatively low overpotentials of ~0.218 V and ~0.33 V to produce a current density of 10 mA cm-2 for the electrocatalytic HER and OER, respectively. Such performance compares favorably to most previously reported Co,Mo-based electrocatalysts for water splitting. The present finding would enrich our knowledge to design and develop catalytically active molybdenum carbide-based electrocatalysts for overall water splitting.

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Publication details

The article was received on 05 Jun 2017, accepted on 12 Jul 2017 and first published on 12 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA04893A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Cobalt/molybdenum carbide@N-doped carbon as bifunctional electrocatalysts for hydrogen and oxygen evolution reactions

    J. Jiang, Q. Liu, C. Zeng and L. Ai, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA04893A

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