In Situ Derived Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH/NiFe/Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH Nanotube Arrays
from NiFe Alloys as Efficient Electrocatalysts for Oxygen Evolution
An-Liang Wang
Yu-Tao Dong
Mei Li
Chaolun Liang
Gao-Ren Li
10.1021/acsami.7b10609.s001
https://acs.figshare.com/articles/journal_contribution/In_Situ_Derived_Ni_sub_i_x_i_sub_Fe_sub_1_i_x_i_sub_OOH_NiFe_Ni_sub_i_x_i_sub_Fe_sub_1_i_x_i_sub_OOH_Nanotube_Arrays_from_NiFe_Alloys_as_Efficient_Electrocatalysts_for_Oxygen_Evolution/5443198
Herein, Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH/NiFe/Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH
sandwich-structured nanotube arrays (SNTAs) supported on carbon fiber
cloth (CFC) (Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH/NiFe/Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH SNTAs–CFC) have been developed as flexible
high-performance oxygen evolution reaction (OER) catalysts by a facile
in situ electrochemical oxidation of NiFe metallic alloy nanotube
arrays during oxygen evolution process. Benefiting from the advantages
of high conductivity, hollow nanotube array, and porous structure,
Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH/NiFe/Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH SNTAs–CFC exhibited a low overpotential of ∼220
mV at the current density of 10 mA cm<sup>–2</sup> and a small
Tafel slope of 57 mV dec<sup>–1</sup> in alkaline solution,
both of which are smaller than those of most OER electrocatalysts.
Furthermore, Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH/NiFe/Ni<sub><i>x</i></sub>Fe<sub>1–<i>x</i></sub>OOH SNTAs–CFC exhibits excellent stability
at 100 mA cm<sup>–2</sup> for more than 30 h. It is believed
that the present work can provide a valuable route for the design
and synthesis of inexpensive and efficient OER electrocatalysts.
2017-09-19 00:00:00
Ni
Oxygen Evolution Herein
oxygen evolution reaction
Fe
carbon fiber cloth
SNTA
CFC
OOH
oxygen evolution process
alloy nanotube arrays
OER electrocatalysts