Application of Pulsed Laser Deposition in Reactive Gaseous Media to Fabricate an Effective Hybrid MoSx/WOy Catalyst for the Reaction of Hydrogen Evolution
- Autores: Nevolin V.1, Grigoriev S.2, Fominski V.1, Romanov R.1, Volosova M.2, Fominski D.1, Dzhumaev P.1
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Afiliações:
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
- Moscow State University of Technology STANKIN
- Edição: Volume 9, Nº 2 (2018)
- Páginas: 297-304
- Seção: New Technologies of Preparation and Treatment of Materials
- URL: https://journals.rcsi.science/2075-1133/article/view/207338
- DOI: https://doi.org/10.1134/S2075113318020211
- ID: 207338
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Resumo
To fabricate an electrocatalyst containing nanostructured layers of WOy and MoSx, a sequential formation of tungsten oxide and molybdenum sulfide thin films is performed by means of the pulsed laser deposition of W and Mo in low-pressure air and hydrogen sulfide media, respectively. The reactive medium pressure and the substrate (glassy carbon) temperature are varied during and after the deposition. WOy thin films of various morphologies and structures determining certain differences in their catalytic properties in the reaction of hydrogen evolution in acidic solutions are obtained. However, the catalytic efficiency of the obtained WOy nanoelements (spheres, needles, and sheets) with amorphous and crystalline structures appears to be insufficient. Additional deposition of MoSx with an amorphous structure results in a significant improvement of the catalytic properties. Sulfur atoms in the MoSx amorphous matrix cause the formation of catalytically active sites, while the developed surface of the WOy stimulates an increase in the catalyst total active area. Penetration of hydrogen effectively formed on MoSx into the bulk of thin films of WOy provides a crucial electrocatalysis condition—low current resistance in the support layer with a large exposed surface area.
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Sobre autores
V. Nevolin
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Autor responsável pela correspondência
Email: nevolin@sci.lebedev.ru
Rússia, Moscow, 115409
S. Grigoriev
Moscow State University of Technology STANKIN
Email: nevolin@sci.lebedev.ru
Rússia, Moscow, 127055
V. Fominski
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Email: nevolin@sci.lebedev.ru
Rússia, Moscow, 115409
R. Romanov
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Email: nevolin@sci.lebedev.ru
Rússia, Moscow, 115409
M. Volosova
Moscow State University of Technology STANKIN
Email: nevolin@sci.lebedev.ru
Rússia, Moscow, 127055
D. Fominski
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Email: nevolin@sci.lebedev.ru
Rússia, Moscow, 115409
P. Dzhumaev
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Email: nevolin@sci.lebedev.ru
Rússia, Moscow, 115409