Release time:2021-03-15  Hits:

• Key Words:OXYGEN EVOLUTION; ULTRATHIN NANOSHEETS; NI FOAM; FE; CATALYSTS; OXIDATION; NANOCRYSTALS; GENERATION; MECHANISM; ELECTRODE
• Abstract:The synthesis of highly active, stable and cost-effective electrocatalysts for overall water splitting is critical but challenging. Herein, we synthesized nickel-doped pyrrhotite iron sulfide (Fe0.95-xNixS1.05) nanosheetsviaa one-pot synthetic route. When tested for oxygen evolution reaction (OER) performance in alkaline solutions, the as-prepared Fe(0.8)Ni(0.15)S(1.05)catalyst exhibited superior electrocatalytic performance to commercial IrO(2)with a current density of 10 mA cm(-2)at an overpotential of 228 mV, and a Tafel slope of 53 mV dec(-1). The hydrogen evolution reaction (HER) activity was achieved on Fe(0.8)Ni(0.15)S(1.05)with a Tafel slope of 103 mV per decade, and a current density of 10 mA cm(-2)at an overpotential of 263 mV. With nickel doping, the as-prepared pyrrhotite iron sulfide nanosheets can expose more active sites, and hence act as a highly efficient catalyst for overall water splitting.
• Volume:8
• Issue:39
• Translation or Not:no