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Stabilizing Active Edge Sites in Semicrystalline Molybdenum Sulfide by Anchorage on Nitrogen-Doped Carbon Nanotubes for Hydrogen Evolution Reaction
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
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2016 (engelsk)Inngår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 26, nr 37, s. 6766-6776Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Finding an abundant and cost-effective electrocatalyst for the hydrogen evolu-tion reaction (HER) is crucial for a global production of hydrogen from water electrolysis. This work reports an exceptionally large surface area hybrid catalyst electrode comprising semicrystalline molybdenum sulfi de (MoS 2+ x) catalystattached on a substrate based on nitrogen-doped carbon nanotubes (N-CNTs), which are directly grown on carbon fiber paper (CP). It is shown here that nitrogen-doping of the carbon nanotubes improves the anchoring of MoS 2+ xcatalyst compared to undoped carbon nanotubes and concurrently stabilizes a semicrystalline structure of MoS 2+ x with a high exposure of active sites for HER. The well-connected constituents of the hybrid catalyst are shown to facilitate electron transport and as a result of the good attributes, the MoS 2+ x/N-CNT/CPelectrode exhibits an onset potential of −135 mV for HER in 0.5 M H2SO4, a Tafel slope of 36 mV dec −1, and high stability at a current density of −10 mA cm −2.

sted, utgiver, år, opplag, sider
Wiley-VCH Verlagsgesellschaft, 2016. Vol. 26, nr 37, s. 6766-6776
Emneord [en]
carbon paper, hydrogen evolution reaction, molybdenum disulfide—MoS2, nitrogen doped carbon nanotubes, water splitting catalysts
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Identifikatorer
URN: urn:nbn:se:umu:diva-128753DOI: 10.1002/adfm.201601994ISI: 000384810300006OAI: oai:DiVA.org:umu-128753DiVA, id: diva2:1056159
Tilgjengelig fra: 2016-12-14 Laget: 2016-12-14 Sist oppdatert: 2018-06-09bibliografisk kontrollert

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