Indexed by:
Journal Papers
First Author:
Zeng, Libin
Correspondence Author:
Chen, AC (reprint author), Univ Guelph, Dept Chem, Electrochem Technol Ctr, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada.
Co-author:
Li, Xinyong,Chen, Shuai,Wen, Jiali,Huang, Wei,Chen, Aicheng
Date of Publication:
2020-04-21
Journal:
JOURNAL OF MATERIALS CHEMISTRY A
Included Journals:
SCIE
Document Type:
J
Volume:
8
Issue:
15
Page Number:
7339-7349
ISSN No.:
2050-7488
Abstract:
Nanostructure tailoring is considered as an efficient strategy to design high-performance electrocatalysts for improving electrocatalytic properties by exposing more active sites and promoting rapid electron transfer. Unfortunately, nanomaterials with a well-constructed morphology for the nitrogen reduction reaction (NRR) under ambient conditions are insufficient, and the yield rate and faradaic efficiency are still not high. Herein, NiFe-MoS2 nanocubes (NiFe@MoS2 NCs) are successfully synthesized derived from the corresponding Prussian blue analog self-templating strategy. Owing to its four-pointed star face-dependent hollow structure and trimetallic synergistic interactions, it largely exposes abundant active sites, making it present superb electrocatalytic performance for N-2 conversion to NH3. In a 0.1 M Na2SO4 electrolyte, these as-prepared Ni-Fe@MoS2 NCs exhibit a significant NH3 yield of 128.17 mu g h(-1) mg(cat.)(-1) and a satisfactory faradaic efficiency of 11.34% at -0.3 V vs. reversible hydrogen electrode (RHE) operation at 40 degrees C. The stability of the catalyst was determined by performing 15 hour continuous N-2 reduction with a constant current density. The possible NRR catalytic paths, mechanism and electron transfer paths are elucidated in detail by in situ electrochemical-Fourier transform infrared spectroscopy combined with density functional theory calculations. This work offers new inspirations to the development of various cost-effective electrocatalysts for N-2 fixation.
Translation or Not:
no
