Abstract
The electrocatalytic nitrogen reduction reaction(NRR)has emerged as a promising renewable energy source and a feasible strategy as an alternative to Haber-Bosch ammonia(NH3)synthesis.However,find-ing an efficient and cost-effective robust catalyst to activate and cleave the extremely strong triple bond in nitrogen(N2)for electrocatalytic NRR is still a challenge.Herein,a FeNi@CNS nanocomposite as an ef-ficient catalyst for N2 fixation under ambient conditions is designed.This FeNi@CNS nanocomposite was prepared by a simple water bath process and post-calcination.The FeNi@CNS is demonstrated to be a highly efficient NRR catalyst,which exhibits better NRR performance with exceptional Faradaic efficiency of 9.83％and an NH3 yield of 16.52 μg h-1 cm-2 in 0.1 M Na2SO4 aqueous solution.Besides,high stability and reproducibility with consecutive 6 cycles for two hours are also demonstrated throughout the NRR electrocatalytic process for 12 h.Meanwhile,the FeNi@CNS catalyst encourages N2 adsorption and activa-tion as well as effectively suppressing competitive HER.Therefore,this earth-abundant FeNi@CNS catalyst with a subtle balance of activity and stability has excellent potential in NRR industrial applications.
基金项目
National Natural Science Foundation of China(11774044)
NETL
NSTL
万方数据