Electrochemical Synergies of Heterostructured Fe2O3-MnO Catalyst for Oxygen Evolution Reaction in Alkaline Water Splitting.
Junyeong KimJun Neoung HeoJeong Yeon DoRama Krishna ChavaMisook KangPublished in: Nanomaterials (Basel, Switzerland) (2019)
For efficient electrode development in an electrolysis system, Fe2O3, MnO, and heterojunction Fe2O3-MnO materials were synthesized via a simple sol-gel method. These particles were coated on a Ni-foam (NF) electrode, and the resulting material was used as an electrode to be used during an oxygen evolution reaction (OER). A 1000-cycle OER test in a KOH alkaline electrolyte indicated that the heterojunction Fe2O3-MnO/NF electrode exhibited the most stable and highest OER activity: it exhibited a low overvoltage (n) of 370 mV and a small Tafel slope of 66 mV/dec. X-ray photoelectron spectroscopy indicated that the excellent redox performance contributed to the synergy of Mn and Fe, which enhanced the OER performance of the Fe2O3-MnO/NF electrode. Furthermore, the effective redox reaction of Mn and Fe indicated that the structure maintained stability even under 1000 repeated OER cycles.
Keyphrases
- solid state
- metal organic framework
- signaling pathway
- carbon nanotubes
- lps induced
- ionic liquid
- visible light
- electron transfer
- oxidative stress
- pi k akt
- room temperature
- nuclear factor
- high resolution
- gold nanoparticles
- magnetic resonance imaging
- single molecule
- computed tomography
- cell proliferation
- transition metal
- magnetic resonance
- solar cells
- reduced graphene oxide
- dual energy
- electron microscopy