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Incorporating iron in nickel cobalt layered double hydroxide nanosheet arrays as efficient oxygen evolution electrocatalyst
- Source :
- Electrochimica Acta. 317:684-693
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Ternary nickel cobalt iron layered double hydroxide nanosheet arrays are synthesized on nickel foam (NiCoFe-LDH/NF) and applied as an oxygen evolution reaction electrocatalyst. The oxidative etching and cation exchange caused by Fe-incorporating induce the change of morphology and the formation of Ni3+, thus increase the specific surface area and expose more active sites, finally greatly enhance the electrocatalytic OER performance. As a result, the Ni2CoFe0.5-LDH/NF electrode exhibits significantly enhanced oxygen evolution reaction performance with a small overpotential of 240 mV at the current density of 10 mA cm−2, a small Tafel slope of 65 mV dec−1 as well as an excellent durability in alkaline conditions for 72 h. Especially, the overpotential of Ni2CoFe0.5-LDH/NF is only 269 mV and 291 mV at 50 and 100 mA cm−2, respectively. This work provides a good paradigm for the design and fabrication of ternary NiCoFe-based functional electrocatalysts, and demonstrates the great practical potential of the Ni2CoFe0.5-LDH/NF electrocatalyst in oxygen evolution reaction.
- Subjects :
- Tafel equation
Materials science
General Chemical Engineering
Oxygen evolution
chemistry.chemical_element
02 engineering and technology
Overpotential
010402 general chemistry
021001 nanoscience & nanotechnology
Electrocatalyst
01 natural sciences
0104 chemical sciences
Nickel
chemistry.chemical_compound
chemistry
Chemical engineering
Electrochemistry
Hydroxide
0210 nano-technology
Cobalt
Nanosheet
Subjects
Details
- ISSN :
- 00134686
- Volume :
- 317
- Database :
- OpenAIRE
- Journal :
- Electrochimica Acta
- Accession number :
- edsair.doi...........46135bb8f9a02f6cfae226ea7e9d5224