Splitting water under large current density is essential for efficient large-scale production and commercial utilization of hydrogen.However,the performance of the available electrocatalysts for hydrogen evolution rea...Splitting water under large current density is essential for efficient large-scale production and commercial utilization of hydrogen.However,the performance of the available electrocatalysts for hydrogen evolution reaction(HER)is far from satisfactory under large current density in alkaline electrolyte.Here we report a remarkably active and durable electrocatalyst,long and dense MoS2/Ni3S2 co-axial heterostructure nanowires on nickel foam(NF).Notably,it requires only 182 and 200 mV overpotential to achieve large current density of 500 and 1000 mA cm^-2,respectively,in alkaline solution,which are far superior to those of Pt/C-NF(281 and 444 mV)and the reported best non-noble metal catalysts(191 and 220 mV).The physical origin for this extraordinary HER performance is analyzed,which provides a useful guide for structure design of electrocatalysts to further improve their performance.展开更多
基金supported by the National Natural Science Foundation of China(51325205,51290273,51521091,and 51861135201)the Chinese Academy of Sciences(XDB30000000,and ZDBS-LY-JSC027)+2 种基金Liaoning Revitalization Talents Program(XLYC1808013)the Program for Guangdong Introducing Innovative and Enterpreneurial Teams(2017ZT07C341)the Development and Reform Commission of Shenzhen Municipality for the development of the“Low-Dimensional Materials and Devices”discipline,and the Economic,Trade and Information Commission of Shenzhen Municipality for the“2017 Graphene Manufacturing Innovation Center Project”(201901171523).
文摘Splitting water under large current density is essential for efficient large-scale production and commercial utilization of hydrogen.However,the performance of the available electrocatalysts for hydrogen evolution reaction(HER)is far from satisfactory under large current density in alkaline electrolyte.Here we report a remarkably active and durable electrocatalyst,long and dense MoS2/Ni3S2 co-axial heterostructure nanowires on nickel foam(NF).Notably,it requires only 182 and 200 mV overpotential to achieve large current density of 500 and 1000 mA cm^-2,respectively,in alkaline solution,which are far superior to those of Pt/C-NF(281 and 444 mV)and the reported best non-noble metal catalysts(191 and 220 mV).The physical origin for this extraordinary HER performance is analyzed,which provides a useful guide for structure design of electrocatalysts to further improve their performance.
