韓敏教授課題組和包建春教授課題組合作在ADVANCED FUNCTIONAL MATERIALS發(fā)表研究論文
Defect-Rich Ni3FeN Nanocrystals Anchored on N-Doped Graphene for Enhanced Electrocatalytic Oxygen Evolution
Zhao, SL (Zhao, Shulin)[ 1 ] ; Li, M (Li, Meng)[ 1 ] ; Han, M (Han, Min)[ 1 ]*（韓敏）; Xu, DD (Xu, Dongdong)[ 1 ] ; Yang, J (Yang, Jing)[ 1 ] ; Lin, Y (Lin, Yue)[ 2 ] ; Shi, NE (Shi, Nai-En)[ 3 ] ; Lu, YN (Lu, Yanan)[ 1 ] ; Yang, R (Yang, Rui)[ 3 ] ; Liu, BT (Liu, Bitao)[ 4 ] ; Dai, ZH (Dai, Zhihui)[ 1 ] ; Bao, JC (Bao, Jianchun)[ 1 ] *（包建春）
[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Biofunct Mat, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[ 3 ] Nanjing Univ Posts & Telecommun, Inst Adv Mat, Key Lab Organ Elect & Informat Displays, Nanjing 210023, Jiangsu, Peoples R China
[ 4 ] Chongqing Univ Arts & Sci, Res Inst New Mat Technol, Chongqing 402160, Peoples R China
ADVANCED FUNCTIONAL MATERIALS，201805,28,18
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 approximate to 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.
文章鏈接：
https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201706018
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