Mo doped FeS ultrathin nanosheets for electro-catalyzing nitrogen reduction under ambient conditions
Ultrathin two-dimensional(2D)nanosheets have garnered significant attention due to their unique size-dependent properties.However,the synthesis methods for these nanosheets as well as the properties of pure ultrathin nanosheets need to be optimized.Herein,a synthesis method is established successfully for easily synthesizable ultrathin FeS nanosheets doped with varying concentrations of Mo to enhance the activity and selectivity of electrocatalytic nitrogen reduction reaction(eNRR),which is achieved through Mo doping FeS to modulate the electronic structure and environment of the active sites,buffer various reaction intermediates,facilitate the absorption of N2,reduce the energy barrier for potentiostatic determination step,and accelerate catalytic process.It is indicated by the results that this noble metal-free Mo-FeS catalyst exhibits efficient performance in eNRR with an ammonia production rate of 10.79 μg·h-1·cm-2 in 0.1 mol/L Na2SO4 at-0.1 V vs reversible hydrogen.
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