In:
Catalysis Science & Technology, Royal Society of Chemistry (RSC), Vol. 13, No. 10 ( 2023), p. 3001-3008
Abstract:
Non-noble metal nitrides have emerged as highly efficient and robust substitutes for platinum-based catalysts toward the oxygen reduction reaction. Herein, we demonstrate a supramolecular confinement strategy to synthesize ultrafine iron nitride (Fe 3 N, less than 1.5 nm) nanocrystals embedded in a nitrogen-doped carbon matrix, in which the pre-formed Fe–N coordination bonds can anchor the Fe 3 N nanocrystals and prevent their agglomeration during the pyrolysis process. Reducing the size of Fe 3 N nanocrystals is conducive to exposing more accessible Fe–N–C ORR active sites and consequently facilitating electrocatalytic ORR activity. The optimized Fe 3 N/NC-800 exhibits a positive half-wave potential of 0.83 V versus RHE, along with favorable stability and superior tolerance toward methanol. The power density and specific capacity of the optimized Zn–air batteries associated with Fe 3 N/NC-800 are as high as 90.91 mW cm −2 and 691.59 mA h g −1 , respectively. Briefly, a feasible supramolecular confinement strategy is proposed for the construction of ultrafine nanocrystals.
Type of Medium:
Online Resource
ISSN:
2044-4753
,
2044-4761
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2595090-3
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