Abstract
Transition metal dichalcogenides (TMDs) are the auspicious inexpensive electrocatalysts for the hydrogen evolution reaction (HER) which has been broadly studied owing to their remarkable enactment, however the drought of factors understanding were highly influenced to hinder their electrocatalytic behavior. Recently, transition metal carbide (TMC) has also emerged as an attractive electrode material due to their excellent ionic and electronic transport behavior. In this work, Mo2C@WS2 hybrids have been fabricated through a simple chemical reaction method. Constructed heterostructure electrocatalyts presented the small Tafel slope of 59 and 95 mV per decade and low overpotential of 93 mV and 98 @10 mA·cm−2 for HER in acidic and alkaline solution, respectively. In addition, 24-h robust stability with the improved interfacial interaction demonstrated the suitability of hybrid electrocatalyst for HER than their pure form of Mo2C and WS2 structures. The derived outcomes describe the generated abundant active sites and conductivity enhancement in TMC/TMD heterostructure along with the weaken ion/electron diffusion resistance for efficient energy generation applications.
Highlights
The swift development of global energy requirements and connected curb climate pollution, as well as environmental challenges has generated an imperative mandate to replace exhaustible fossil fuels for renewable energy sources
The study of Transition metal dichalcogenides (TMDs)/transition metal carbide (TMC) based hybrid for hydrogen evolution reaction (HER) application is still infancy and there are only few articles deal with this topic
The low Rct of Mo2C@WS2 hybrid may be related to effect of intimate contact effect between the exposed edges sites (WS2) and the reaction of the metallic superconductor Mo2C sublayers that can reduce the resistance to electron transportation at the porous catalyst/electrolyte boundary and produce the rapid response for HER
Summary
The swift development of global energy requirements and connected curb climate pollution, as well as environmental challenges has generated an imperative mandate to replace exhaustible fossil fuels for renewable energy sources. The prepared Mo2C@WS2 hybrids FESEM images are clearly pictured the formation bulk grains by the agglomerated nanoparticles as shown in the Figure 3g–i.
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