摘要
Transition metal dichalcogenides have shown promise as highly efficient hydrogen evolution reaction(HER)electrocatalysts.In this work,we demonstrate a one-pot hydrothermal synthesis of ternary 2H-MoS_(2)xSe_(2(1−x))nanosheets for enhanced hydrogen production.Compared to pristine 2H-MoSe_(2)and 2H-MoS_(2),introduction of a third element not only expands the interlayer spacing,but also provides more active catalytic sites and lowers the charge transfer resistance.As a consequence,MoS_(2)xSe_(2(1−x))exhibits a high electrocatalytic HER activity with a low overpotential of 188 mV vs.a RHE to achieve a geometric current density of−10 mA cm^(−2)and a low Tafel slope of 43 mV dec^(−1 )in 0.5 M H_(2)SO_(4).This study provides valuable insights that ternary structure formation can be effective for the preparation of high-performance HER electrocatalysts.
基金
supported by the National Natural Science Foundation of China(grant no.21471039,21571043,21671047)
the Fundamental Research Funds for the Central Universities(PIRS of HIT A201502 and HIT.BRETIII.201223)
the China Postdoctoral Science Foundation(2014M560253)
the Postdoctoral Scientific Research Fund of Heilongjiang Province(LBH-Q14062,LBH-Z14076)
the Natural Science Foundation of Heilongjiang Province(B2015001).
