摘要
Electrocatalytic water splitting via hydrogen evolution reaction(HER)represents one of promising strategies to gain hydrogen energy.In current work,self-supporting Co_(0.85)Se nanosheets network anchored on Co plate(Co_(0.85)Se NSs@Co)is fabricated by employing easily tailorable Co metal plate as the source conductive substrate.The scalable dealloying and hydrothermal selenization strategy was employed to build one layer of three dimensional interlinking Co_(0.85)Se nanosheets network on the surface of Co plate.Benefiting from bulky integrated architecture and rich active sites,the as-made Co_(0.85)Se NSs@Co exhibits superior electrocatalytic activity and long-term catalytic durability toward HER.It only requires lower overpotentials of 121 and 162 mV to drive the current density of 10 mA·cm^(−2)for hydrogen evolution in 0.5 M H_(2)SO_(4)and 1 M KOH solution.Especially,no evident activity decay occurs upon 1,500 cycles or continuous test for 20 h at 10 mA·cm^(−2)in both acidic and alkaline electrolytes.With the merits of exceptional performances,scalable production,and low cost,the self-supporting Co0.85Se NSs@Co holds prospective application potential as stable and binder-free electrocatalysts for hydrogen generation in a wide range of electrolyte.
基金
supported by National Natural Science Foundation of China(No.51772133),Shandong Province(No.ZR2017JL022)
the project of“20 items of University”of Jinan(No.2018GXRC001)
Case-by-Case Project for Top Outstanding Talents of Jinan.