scholarly journals Electrodeposition of amorphous molybdenum sulfide thin film for electrochemical hydrogen evolution reaction

BMC Chemistry ◽  
2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Lina Zhang ◽  
Liangliu Wu ◽  
Jing Li ◽  
Jinglei Lei
Keyword(s):  
Thin Film ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Molybdenum Sulfide

Nanostructured MoS3/WSe2 thin-film photocathode for efficient water splitting under light illumination

2020 ◽  
pp. 5-18
Author(s):  
V. N. Nevolin ◽  
◽  
R. I. Romanov ◽  
D. V. Fominski ◽  
O. V. Rubinkovskaya ◽  
...  
Keyword(s):  
Thin Film ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
Substrate Surface ◽  
Molybdenum Sulfide ◽  
Carbon Substrate ◽  
High Catalytic Activity ◽  
Light Illumination

The influence of the chemical state of the WOу thin-film precursor on the formation of WSe2 nanofilms under rapid selenization on a glassy-carbon substrate at 900°C was studied. Amorphous molybdenum sulfide (MoSx~3), which has high catalytic activity in the electrochemical hydrogen evolution reaction, was prepared on the surface of the WSe2 films by pulsed laser deposition. It was shown that the composition of the WOу precursors had a significant effect on the morphology of WSe2 nanolayers, and this characteristic largely determined the efficiency of hydrogen evolution by the MoS3/WSe2 heterostructure upon photo-activated water splitting. The most efficient hydrogen evolution was found for the MoS3/WSe2 photocathode that contained WSe2 in the form of petal crystals of ~ 50 nm thickness and these petals were oriented perpendicular to the substrate surface. A theoretical analysis of the possible effect of synergetic interaction at the MoS3/WSe2 interface on the efficiency of hydrogen formation was carried out. Calculations using the density functional theory showed that MoS3 clusters can increase the efficiency of the hydrogen evolution reaction in contact with surface areas of WSe2 nanocrystals possessing different atomic packing.

3D flexible hydrogen evolution electrodes with Se-promoted molybdenum sulfide nanosheet arrays

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11077-11080 ◽  
Author(s):  
Zonghua Pu ◽  
Shiyong Wei ◽  
Zhibao Chen ◽  
Shichun Mu
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Molybdenum Sulfide ◽  
Carbon Cloth ◽  
Nanosheet Arrays

Se-promoted molybdenum sulfide nanosheet arrays supported on carbon cloth are developed as a novel electrocatalyst for hydrogen evolution reaction.

Aged Co-Mo alloy thin film catalyst for hydrogen evolution reaction in acidic solution

2021 ◽  
pp. 2151018
Author(s):  
Cihan Kuru
Keyword(s):  
Thin Film ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Acidic Solution ◽  
Alloy Film ◽  
Surface Oxide Layer ◽  
Alloy Thin Film ◽  
Acidic Solutions ◽  
Thin Film Catalyst

In this study, aged Co–Mo (3:10) alloy film has been demonstrated as an efficient and durable catalyst for hydrogen evolution reaction (HER) in acidic solution. The Co–Mo alloy films with varying Co/Mo atomic ratios have been deposited by magnetron sputtering. The catalytic activity of Mo film is outperformed by the Co–Mo alloys, among which the Co–Mo (3:10) alloy exhibits the highest HER activity with an overpotential of 310 mV at 10 mA cm[Formula: see text] current density, exchange current density of 1.74 × 10[Formula: see text] A cm[Formula: see text] and a Tafel slope of 61 mV dec[Formula: see text]. Combined with the good stability provided by the surface oxide layer, the aged Co–Mo (3:10) alloy is a promising catalyst for HER in acidic solutions.

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