Design of single metal atoms supported on SbC monolayer as promising electrochemical hydrogen evolution catalysts
Developing hydrogen evolution reaction(HER)catalyst with high activity is essential for satisfying the fu-ture large-scale hydrogen energy requirements.Considering unique advantages of two-dimensional materials and a-tomic transition metals,using density functional theory calculation,the HER on 10 different single transition metals supported on antimony carbide monolayer(SbC)has been investigated.The results show that Ir-SbC with good thermal stability has the most optimal value(-0.016 eV).of Gibbs free adsorption energy for H atom,which is very close to 0.Moreover,the density of states and charge density difference analysis of H-Ir-SbC reveals that,Ir and H peaks overlap between the energy interval from-5 to 0 eV,indicating the existence of bonding interactions and charge transfer.The above findings suggest that Ir-SbC is a promising HER catalyst to replace precious metals such as Pt.
hydrogen evolution reactionantimony carbide monolayertransition-metal single atomdensity functional theory