Journal
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B
Volume 14, Issue 4, Pages 714-721Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1990793120040041
Keywords
molybdenum sulfides; thin films; nanostructure; electrocatalysis; hydrogen evolution; pulsed laser deposition
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Funding
- Russian Science Foundation [19-19-00081]
- Russian Science Foundation [19-19-00081] Funding Source: Russian Science Foundation
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The mechanisms of film formation during pulsed laser ablation of a MoS(2)target were studied. The conditions for the deposition of laser erosion plume were determined. This made it possible to obtain coatings with a porous structure consisting of round Mo nanoparticles coated with a thin shell of amorphous molybdenum sulfide MoSx > 2. Due to its hybrid structure, the MoSx > 2/Mo nanomaterial can be effectively used for electro- and photocatalysis of water splitting. The MoSx> 2/Mo films deposited on a glassy carbon substrate are characterized by good current transport and high active surface area. When the film thickness increased due to the increased deposition time, the overvoltage of hydrogen evolution in an acid solution monotonically decreased to 142.5 mV, which was necessary in order to obtain current density of hydrogen evolution of 10 mA/cm(2). The catalyst loading was 230 mu g/cm(2). Further increase in the loading did not significantly reduce the overvoltage. The results indicate that it is promising to use Mo nanoparticles as an ultrafine support for the catalytic nanolayers of amorphous molybdenum sulfide.
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