Amorphous hydroxide on a foamed nickel substrate was fabricated by a simple and efficient electrospinning method for the first time.In untreated alkaline medium,amorphous cobalt(Co)-iron(Fe)hydroxide showed oxygen-evo...Amorphous hydroxide on a foamed nickel substrate was fabricated by a simple and efficient electrospinning method for the first time.In untreated alkaline medium,amorphous cobalt(Co)-iron(Fe)hydroxide showed oxygen-evolution advantages over the typical reference catalyst(RuO_(2)).When tested with a three-electrode system in 1 M KOH,the obtained amorphous PVP/CoFe_(1.3)nanofibers possessed remarkable catalytic activity and stability for the oxygen evolution reaction(OER)with a low overpotential of 0.267 V at 100 mA cm^(-2)and a low Tafel slope of 47.43 mV dec^(-1).The amorphous CoFe microfibers were synthesized by electrospinning,and stable CoFe hydroxides can be further formed in the alkaline environment.The synergistic effect between two different amorphous CoFe-based hydroxides contributed to excellent electrocatalytic activity.Therefore,the design of amorphous CoFe hydroxide enabled the development of a high-efficiency OER catalyst and opens possibilities for the large-scale and environmentally friendly production of water splitting.展开更多
基金National Natural Science Foundation of China(21473013,51203008,21771021,and 21822501)Beijing Nova Program(xx2018115)+1 种基金Fundamental Research Funds for the Central UniversitiesAnalytical and Measurements Fund of Beijing Normal University。
文摘Amorphous hydroxide on a foamed nickel substrate was fabricated by a simple and efficient electrospinning method for the first time.In untreated alkaline medium,amorphous cobalt(Co)-iron(Fe)hydroxide showed oxygen-evolution advantages over the typical reference catalyst(RuO_(2)).When tested with a three-electrode system in 1 M KOH,the obtained amorphous PVP/CoFe_(1.3)nanofibers possessed remarkable catalytic activity and stability for the oxygen evolution reaction(OER)with a low overpotential of 0.267 V at 100 mA cm^(-2)and a low Tafel slope of 47.43 mV dec^(-1).The amorphous CoFe microfibers were synthesized by electrospinning,and stable CoFe hydroxides can be further formed in the alkaline environment.The synergistic effect between two different amorphous CoFe-based hydroxides contributed to excellent electrocatalytic activity.Therefore,the design of amorphous CoFe hydroxide enabled the development of a high-efficiency OER catalyst and opens possibilities for the large-scale and environmentally friendly production of water splitting.
