Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7708149 | International Journal of Hydrogen Energy | 2018 | 8 Pages |
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 200.0Â mV and affords a current density of 3.5Â mAÂ cmâ2 at an overpotential of 600.0Â mV in KOH solution at pHÂ 13.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Mohammad Mahdi Najafpour, Somayeh Mehrabani, Robabeh Bagheri, Zhenlun Song, Jian-Ren Shen, Suleyman I. Allakhverdiev,