TY - JOUR
T1 - Defect-Rich Ni3FeN Nanocrystals Anchored on N-Doped Graphene for Enhanced Electrocatalytic Oxygen Evolution
AU - Zhao, Shulin
AU - Li, Meng
AU - Han, Min
AU - Xu, Dongdong
AU - Yang, Jing
AU - Lin, Yue
AU - Shi, Nai En
AU - Lu, Yanan
AU - Yang, Rui
AU - Liu, Bitao
AU - Dai, Zhihui
AU - Bao, Jianchun
N1 - Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/5/4
Y1 - 2018/5/4
N2 - Owing to their unique optical, electronic, and catalytic properties, metal nitrides nanostructures are widely used in optoelectronics, clean energy, and catalysis fields. Despite great progress has been achieved, synthesis of defect-rich (DR) bimetallic nitride nanocrystals or related nanohybrids remains a challenge, and their electrocatalytic application for oxygen evolution reaction (OER) has not been fully studied. Herein, the DR-Ni3FeN nanocrystals and N-doped graphene (N-G) nanohybrids (DR-Ni3FeN/N-G) are fabricated through temperature-programmed annealing and nitridation treatment of NiFe-layered double hydroxides/graphene oxide precursors by controlling annealing atmosphere. In the nanohybrids, the DR-Ni3FeN nanocrystals are anchored on N-G, and mainly show twin crystal defects besides ≈10% of stacking faults. Such nanohybrids can efficiently catalyze OER in alkaline media with a small overpotential (0.25 V) to attain the current density of 10 mA cm−2 and a high turnover frequency (0.46 s−1), superior to their counterparts (the nearly defect-free Ni3FeN/N-G), commercial IrO2, and the-state-of-art reported OER catalysts. Except for the superior activity, they show better durability than their counterparts yet. As revealed by microstructural, spectroscopic, and electrochemical analyses, the enhanced OER performance of DR-Ni3FeN/N-G nanohybrids originates from the abundant twin crystal defects in Ni3FeN active phase and the strong interplay between DR-Ni3FeN and N-G.
AB - Owing to their unique optical, electronic, and catalytic properties, metal nitrides nanostructures are widely used in optoelectronics, clean energy, and catalysis fields. Despite great progress has been achieved, synthesis of defect-rich (DR) bimetallic nitride nanocrystals or related nanohybrids remains a challenge, and their electrocatalytic application for oxygen evolution reaction (OER) has not been fully studied. Herein, the DR-Ni3FeN nanocrystals and N-doped graphene (N-G) nanohybrids (DR-Ni3FeN/N-G) are fabricated through temperature-programmed annealing and nitridation treatment of NiFe-layered double hydroxides/graphene oxide precursors by controlling annealing atmosphere. In the nanohybrids, the DR-Ni3FeN nanocrystals are anchored on N-G, and mainly show twin crystal defects besides ≈10% of stacking faults. Such nanohybrids can efficiently catalyze OER in alkaline media with a small overpotential (0.25 V) to attain the current density of 10 mA cm−2 and a high turnover frequency (0.46 s−1), superior to their counterparts (the nearly defect-free Ni3FeN/N-G), commercial IrO2, and the-state-of-art reported OER catalysts. Except for the superior activity, they show better durability than their counterparts yet. As revealed by microstructural, spectroscopic, and electrochemical analyses, the enhanced OER performance of DR-Ni3FeN/N-G nanohybrids originates from the abundant twin crystal defects in Ni3FeN active phase and the strong interplay between DR-Ni3FeN and N-G.
KW - N-doped graphene
KW - defects
KW - electrocatalysis
KW - metal nitrides
KW - nanohybrids
KW - oxygen evolution reaction
UR - http://www.scopus.com/inward/record.url?scp=85038103810&partnerID=8YFLogxK
U2 - 10.1002/adfm.201706018
DO - 10.1002/adfm.201706018
M3 - 文章
AN - SCOPUS:85038103810
SN - 1616-301X
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 18
M1 - 1706018
ER -