The search for efficient,robust,and cost-effective catalysts for the hydrogen evolution reaction(HER)is highly desirable.However,the development of freshwater/seawater electrolysis for hydrogen production as a viable ...The search for efficient,robust,and cost-effective catalysts for the hydrogen evolution reaction(HER)is highly desirable.However,the development of freshwater/seawater electrolysis for hydrogen production as a viable energy conversion technology remains a challenge.Herein,a fluorine-doped Ni(OH)_(2)/Ni–B amorphous heterostructure(FNH/NB)was synthesized via simple hydrothermal,electroless plating,and alkaline etching methods.Our designed experiments demonstrate that the as-prepared catalyst benefiting from amorphous interfacial coupling and F-induced effects exhibits accelerated H_(2)O dissociation kinetics and optimized adsorption of intermediates.As a result,the FNH/NB catalyst shows high alkaline HER activity,requiring low overpotentials of 23,28,and 30 mV to drive a current density of 10 mA cm^(−2) in alkaline freshwater,simulated seawater,and real seawater,respectively.Particularly,the stability of the designed catalyst is effectively improved using a fluorine doping strategy.Specifically,FNH/NB could maintain excellent electrocatalytic performance over 50 hours at current densities of 10 and 1000 mA cm^(−2) in an alkaline solution containing KF.The current work reveals the superiority of integrating F doping and amorphous heterostructure engineering in developing efficient and robust catalysts.展开更多
基金The authors are grateful to Guangxi Science and Technology Program[No.Guike AD23026107]Natural Science Foundation of Guangxi Province of China[No.2024GXNSFBA010234]the National Natural Science Foundation of China[No.22062002,22265002]for financial support.
文摘The search for efficient,robust,and cost-effective catalysts for the hydrogen evolution reaction(HER)is highly desirable.However,the development of freshwater/seawater electrolysis for hydrogen production as a viable energy conversion technology remains a challenge.Herein,a fluorine-doped Ni(OH)_(2)/Ni–B amorphous heterostructure(FNH/NB)was synthesized via simple hydrothermal,electroless plating,and alkaline etching methods.Our designed experiments demonstrate that the as-prepared catalyst benefiting from amorphous interfacial coupling and F-induced effects exhibits accelerated H_(2)O dissociation kinetics and optimized adsorption of intermediates.As a result,the FNH/NB catalyst shows high alkaline HER activity,requiring low overpotentials of 23,28,and 30 mV to drive a current density of 10 mA cm^(−2) in alkaline freshwater,simulated seawater,and real seawater,respectively.Particularly,the stability of the designed catalyst is effectively improved using a fluorine doping strategy.Specifically,FNH/NB could maintain excellent electrocatalytic performance over 50 hours at current densities of 10 and 1000 mA cm^(−2) in an alkaline solution containing KF.The current work reveals the superiority of integrating F doping and amorphous heterostructure engineering in developing efficient and robust catalysts.
