Three-dimensional smart catalyst electrode for oxygen evolution reaction

Chen, Sheng, Duan, Jingjing, Bian, Pengju, Tang, Youhong, Zheng, Rongkun and Qiao, Shi-Zhang (2015) Three-dimensional smart catalyst electrode for oxygen evolution reaction. Advanced Energy Materials, 5 18: 1-7. doi:10.1002/aenm.201500936


Author Chen, Sheng
Duan, Jingjing
Bian, Pengju
Tang, Youhong
Zheng, Rongkun
Qiao, Shi-Zhang
Title Three-dimensional smart catalyst electrode for oxygen evolution reaction
Journal name Advanced Energy Materials   Check publisher's open access policy
ISSN 1614-6840
1614-6832
Publication date 2015-09-23
Year available 2015
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1002/aenm.201500936
Open Access Status Not Open Access
Volume 5
Issue 18
Start page 1
End page 7
Total pages 7
Place of publication Weinheim, Germany
Publisher Wiley VCH Verlag
Collection year 2016
Language eng
Formatted abstract
A multifunctional catalyst electrode mimicking external stimuli–responsive property has been prepared by the in situ growth of nitrogen (N)-doped NiFe double layered hydroxide (N–NiFe LDH) nanolayers on a 3D nickel foam substrate framework. The electrode demonstrates superior performance toward catalyzing oxygen evolution reaction (OER), affording a low overpotential of 0.23 V at the current density of 10 mA cm−2, high Faradaic efficiency of ≈98%, and stable operation for >60 h. Meanwhile, the electrode can dynamically change its color from gray silver to dark black with the OER happening, and the coloration/bleaching processes persist for at least 5000 cycles, rendering it a useful tool to monitor the catalytic process. Mechanism study reveals that the excellent structural properties of electrode such as 3D conductive framework, ultra thickness of N–NiFe LDH nanolayer (≈0.8 nm), and high N-doping content (≈17.8%) make significant contribution to achieving enhanced catalytic performance, while N–NiFe LDH nanolayer on electrode is the main contributor to the stimuli-responsive property with the reversible extraction/insertion of electrons from/into N–NiFe LDH leading to the coloration/bleaching processes. Potential application of this electrode has been further demonstrated by integrating it into a Zn–air battery device to identify the charging process during electrochemical cycling.
Keyword Catalyst electrodes
Heteroatom doping
Oxygen evolution reaction
Smart material
Two-dimensional nanolayers
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Non HERDC
Australian Institute for Bioengineering and Nanotechnology Publications
 
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