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3D-composite structure of FeP nanorods supported by vertical aligned graphene for high-performance hydrogen evolution reaction

Abstract

Iron phosphide (FeP), as a low-cost and earth-abundant electrocatalyst, has reveived increasing attention over recent years. However, its hydrogen evolution reaction (HER) performance is still far from satisfaction in terms of both activity and stability. In this study, by employing the vertical aligned graphene nanosheets (VAGNs) as the backbone, we synthesized a novel three dimension (3D) FeP/VAGNs hybrid nanostructure on carbon cloth (FePNRs/VAGNs/CC) as a binder-free efficient electrocatalyst for HER. The villiform FeP nanorods with the diameter of ~50 nm and length of 100~300 nm were successfully grown on the surface of VAGNs by a electrodeposition process follwing a phosphidation treatment. The separate VAGNs not only provide the 3D architecture for FeP growth, but also facilitates the charge transfer. As expected, such 3D hybrid electrocatalyst exhibits an enhanced HER activity with an onset potential of 19 mV, an overpotential at 10 mA cm-2 of 53 mV, a Tafel slope of 42 mV dec-1, and an remarkable stability and durability in acide solution. The superiorly hybrid FeP electrode might pave an efficient way for the pratical application toward hydrogen generation.

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Publication details

The article was received on 10 Mar 2017, accepted on 15 May 2017 and first published on 15 May 2017


Article type: Paper
DOI: 10.1039/C7TA02149F
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    3D-composite structure of FeP nanorods supported by vertical aligned graphene for high-performance hydrogen evolution reaction

    C. Wang, D. li, Q. Liao, B. ren, Q. jin and H. cui, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA02149F

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