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Title: Ultrafine and highly disordered Ni 2 Fe 1 nanofoams enabled highly efficient oxygen evolution reaction in alkaline electrolyte

Abstract

Nickel iron hydroxides are the most promising non-noble electrocatalysts for oxygen evolution reaction (OER) in alkaline media. By in situ reduction of metal precursors, compositionally controlled three-dimensional (3D) NixFeyB nanofoams (NFs) are synthesized with high surface area and uniformly distributed bimetallic networks. The resultant ultrafine amorphous Ni2Fe1B NFs exhibit extraordinary electrocatalytic performance toward OER and overall water splitting in alkaline media. At a potential as low as 1.42 V (vs. RHE), Ni2Fe1B NFs can deliver a current density of 10 mA/cm2 and show negligible activity loss after 12 hours’ stability test. Even at large current flux of 100 mA/cm2, an ultralow overpotential of 0.27 V is achieved, which is about 0.18 V more negative than benchmark RuO2. Both ex-situ Mӧssbauer spectroscopy and X-ray Absorption Spectroscopy (XAS) reveal a phase separation and transformation for the Ni2Fe1B catalyst during OER process. The evolution of oxidation state and disordered structure of Ni2Fe1B might be a key to the high catalytic performance for OER.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1427901
Report Number(s):
PNNL-SA-126521
Journal ID: ISSN 2211-2855; 48877; TE1400000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nano Energy; Journal Volume: 44; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Fu, Shaofang, Song, Junhua, Zhu, Chengzhou, Xu, Gui-Liang, Amine, Khalil, Sun, Chengjun, Li, Xiaolin, Engelhard, Mark H., Du, Dan, and Lin, Yuehe. Ultrafine and highly disordered Ni 2 Fe 1 nanofoams enabled highly efficient oxygen evolution reaction in alkaline electrolyte. United States: N. p., 2018. Web. doi:10.1016/j.nanoen.2017.12.010.
Fu, Shaofang, Song, Junhua, Zhu, Chengzhou, Xu, Gui-Liang, Amine, Khalil, Sun, Chengjun, Li, Xiaolin, Engelhard, Mark H., Du, Dan, & Lin, Yuehe. Ultrafine and highly disordered Ni 2 Fe 1 nanofoams enabled highly efficient oxygen evolution reaction in alkaline electrolyte. United States. doi:10.1016/j.nanoen.2017.12.010.
Fu, Shaofang, Song, Junhua, Zhu, Chengzhou, Xu, Gui-Liang, Amine, Khalil, Sun, Chengjun, Li, Xiaolin, Engelhard, Mark H., Du, Dan, and Lin, Yuehe. Thu . "Ultrafine and highly disordered Ni 2 Fe 1 nanofoams enabled highly efficient oxygen evolution reaction in alkaline electrolyte". United States. doi:10.1016/j.nanoen.2017.12.010.
@article{osti_1427901,
title = {Ultrafine and highly disordered Ni 2 Fe 1 nanofoams enabled highly efficient oxygen evolution reaction in alkaline electrolyte},
author = {Fu, Shaofang and Song, Junhua and Zhu, Chengzhou and Xu, Gui-Liang and Amine, Khalil and Sun, Chengjun and Li, Xiaolin and Engelhard, Mark H. and Du, Dan and Lin, Yuehe},
abstractNote = {Nickel iron hydroxides are the most promising non-noble electrocatalysts for oxygen evolution reaction (OER) in alkaline media. By in situ reduction of metal precursors, compositionally controlled three-dimensional (3D) NixFeyB nanofoams (NFs) are synthesized with high surface area and uniformly distributed bimetallic networks. The resultant ultrafine amorphous Ni2Fe1B NFs exhibit extraordinary electrocatalytic performance toward OER and overall water splitting in alkaline media. At a potential as low as 1.42 V (vs. RHE), Ni2Fe1B NFs can deliver a current density of 10 mA/cm2 and show negligible activity loss after 12 hours’ stability test. Even at large current flux of 100 mA/cm2, an ultralow overpotential of 0.27 V is achieved, which is about 0.18 V more negative than benchmark RuO2. Both ex-situ Mӧssbauer spectroscopy and X-ray Absorption Spectroscopy (XAS) reveal a phase separation and transformation for the Ni2Fe1B catalyst during OER process. The evolution of oxidation state and disordered structure of Ni2Fe1B might be a key to the high catalytic performance for OER.},
doi = {10.1016/j.nanoen.2017.12.010},
journal = {Nano Energy},
number = C,
volume = 44,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2018},
month = {Thu Feb 01 00:00:00 EST 2018}
}