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RGO modified Ni doped FeOOH for enhanced electrochemical and photoelectrochemical water oxidation
- Source :
- Applied Surface Science. 436:974-980
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Ni,Fe-based (oxy)hydroxides have been one of the most active catalysts for the oxygen evolution reaction. In this article, reduced graphene oxide supported Ni doped FeOOH (RGO/Ni:FeOOH) was prepared for electrochemical and photoelectrochemical (PEC) water oxidation. The RGO/Ni:FeOOH exhibited a lower over-potential (260 mV at 10 mA cm−2) and smaller Tafel slope (32.3 mV dec−1) than that of the FeOOH and Ni:FeOOH. Such significant enhancement is attributed to Ni doping and RGO, which reduce the over-potential, improve the conductivity and enlarge surface areas. Besides, RGO/Ni:FeOOH decorated the TiO2 nanorods (NRs) was also fabricated for photoelectrochemical (PEC) water oxidation, which exhibited a higher photocurrent density and lower onset potential than that of TiO2 NRs the bare under illumination due to the synergistic effect of RGO and Ni:FeOOH. These results demonstrate the RGO/Ni:FeOOH has great promising as a co-catalyst to improve the PEC performance.
- Subjects :
- Photocurrent
Tafel equation
Materials science
Graphene
Doping
Oxygen evolution
Oxide
General Physics and Astronomy
02 engineering and technology
Surfaces and Interfaces
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Electrochemistry
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
law.invention
chemistry.chemical_compound
Chemical engineering
chemistry
law
Nanorod
0210 nano-technology
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 436
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........f4c6c6d66920d44dc76b55e8bbf87445