Iron-Nickel Oxide/ Iron-Nickel Surface for Water Oxidation†
Paper ID : 1291-ICNS
Authors:
Amirreza Valizadeh *1, Mohammad Mahdi Najafpour2, Suleyman allakhverdiev3
1Nanochemistry, Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran
2Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137- 66731, Iran
3Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia
Abstract:
: Rapid depletion of fossil fuels and environmental problems have forced humans to find clean and sustainable energy sources. Water splitting is a promising strategy to store energy. A limitation for water splitting is water-oxidation reaction. Thus, finding an efficient, stable, low-cost, earth-abundant, and environmentally friendly catalysts for this reaction is a challenging issue.Herein, a straightforward method is applied to make an effective and stable Fe-Ni based electrode for water oxidation. According to this method, a Fe-Ni alloy is operated under a high potential, and the significant re-construction of the surface makes the alloy an efficient and stable electrode for water oxidation. The prepared Fe-Ni based electrode is characterized by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectrometry. The electrode at pH=13 indicates an overpotential of 265 mV for the onset of water oxidation. The current density of 10 mA/cm2 is also found at 445 mV overpotential. After 5 hours of amperometry at 695 mV overpotential, an increase in water oxidation from 33 to 39 mA/cm2 is found.
Keywords:
water oxidation – Nickel-iron- Electrolyser - Overpotential
Status : Abstract Accepted (Oral Presentation)