An aluminum/cobalt/iron/nickel alloy as a precatalyst for water oxidation

Mohammad Mahdi Najafpour, Somayeh Mehrabani, Robabeh Bagheri, Zhenlun Song, Jian-Ren Shen, Suleyman Allakhverdiev

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Among different strategies, water splitting toward hydrogen production is a promising process to store energy from intermittent sources. However, the anodic water oxidation is a bottleneck for water splitting. In this paper, we report an aluminum/cobalt/iron/nickel alloy as a precatalyst for the electrochemical water oxidation. The alloy electrode contains different metal ions including cobalt, iron, and nickel which all are efficient for water oxidation is tested. We characterized this electrode using scanning electron microscopy, transmission electron microscopy, diffuse reflectance infrared Fourier transform spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical methods. After stabilization, the electrode shows an onset overpotential of 200.0 mV and affords a current density of 3.5 mA cm-2 at an overpotential of 600.0 mV in KOH solution at pH 13.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusAccepted/In press - Jan 1 2018

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Keywords

  • Alloy
  • Artificial photosynthesis
  • Hydrogen production
  • Water
  • Water oxidation
  • Water-oxidizing catalyst

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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