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MoS versatile spray-coating of 3D electrodes for the hydrogen evolution reaction
Ist Teil von
Nanoscale, 2019-05, Vol.11 (2), p.9888-9895
Erscheinungsjahr
2019
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A facile one-step MoS
2
spray-coating method was applied to a range of rigid, flexible, porous and 3D printed carbon-based surfaces, yielding high loadings in MoS
2
flakes. The characterization of MoS
2
flakes from a commercial lubricant spray reveals up to micron-scale bulk sheets of the layered material, constituted in its majority by the semiconducting 2H polymorph, in the presence of the metallic 1T phase. Consequently, the process generates MoS
2
spray-coated surfaces with improved hydrogen evolution reaction (HER) catalytic performance. In the case of carbon-based screen printed electrodes (SPE), a short-term thermal post-treatment of the MoS
2
spray-coated SPE had a further beneficial effect in the HER overpotential. The MoS
2
spray-coated 3D metallic meshes held the lowest HER overpotential of the series. Finally, MoS
2
spray-coated 3D printed electrodes yielded improved heterogeneous charge transfer and a 500 mV shift in the required overpotential at a current density of −10 mA cm
−2
. The MoS
2
spray-coated 3D printed electrode displayed an abundant coverage at the inner, external and planar zones of electrodes by the MoS
2
sheets, even after long-term operation conditions. These outcomes can be beneficial for future tailoring of MoS
2
spray-coated surfaces and their implementation in energy conversion technologies.
A straightforward MoS
2
spray-coating method was applied to rigid, flexible, porous and 3D-printed carbon-based surfaces, yielding improved performance for the hydrogen evolution reaction.
Sprache
–
Identifikatoren
ISSN: 2040-3364
eISSN: 2040-3372
DOI: 10.1039/c9nr01876j
Titel-ID: cdi_rsc_primary_c9nr01876j
Format
–
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