Application of Pulsed Laser Deposition in Reactive Gaseous Media to Fabricate an Effective Hybrid MoSx/WOy Catalyst for the Reaction of Hydrogen Evolution


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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.

作者简介

V. Nevolin

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

编辑信件的主要联系方式.
Email: nevolin@sci.lebedev.ru
俄罗斯联邦, Moscow, 115409

S. Grigoriev

Moscow State University of Technology STANKIN

Email: nevolin@sci.lebedev.ru
俄罗斯联邦, Moscow, 127055

V. Fominski

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: nevolin@sci.lebedev.ru
俄罗斯联邦, Moscow, 115409

R. Romanov

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: nevolin@sci.lebedev.ru
俄罗斯联邦, Moscow, 115409

M. Volosova

Moscow State University of Technology STANKIN

Email: nevolin@sci.lebedev.ru
俄罗斯联邦, Moscow, 127055

D. Fominski

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: nevolin@sci.lebedev.ru
俄罗斯联邦, Moscow, 115409

P. Dzhumaev

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: nevolin@sci.lebedev.ru
俄罗斯联邦, Moscow, 115409

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