Journal
ADVANCED ENERGY MATERIALS
Volume 5, Issue 18, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201500936
Keywords
Two-dimensional nanolayers; catalyst electrodes; heteroatom doping; oxygen evolution reaction; smart material
Categories
Funding
- Australian Research Council (ARC) [DP140104062, DP130104459]
Ask authors/readers for more resources
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 approximate to 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 (approximate to 0.8 nm), and high N-doping content (approximate to 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available