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Titanium dioxide-coated nickel foam photoelectrodes for direct urea fuel cell applications

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  • Alami, Abdul Hai
  • Abdelkareem, Mohammad Ali
  • Faraj, Mohammed
  • Aokal, Kamilia
  • Al Safarini, Nada

Abstract

In this work we report on the manufacturing and testing of a photoelectrode made from nickel foam covered with titanium dioxide for potential use as a photoanode in direct urea fuel cells. The microstructure and composition of these electrodes were examined, and their electrochemical response to illumiation documented. The electrodes offer two main advantages for photo-assisted applications, namely transperacy as well as good electrical conductivity. The electrodes were placed in a sodium hydroxide solution that is taken as a reference, against which chronopotentiometric measurements were taken for various concentrations of urea in the solution (from 0.05 to 0.7 M). The results show that the prepared photoanode exhibited high photcatalytic activity towards urea oxidation where 80% more photocurrent generated in case of 0.07 M urea compared to that obtained in case of the base solution and thus the 0.07 M is the optimum urea concentration for the application in hand. This is a promising result for photoassisted direct urea fuel cell applicaitons that could benefit from a replacement to the otherwise expensive Pt electrodes.

Suggested Citation

  • Alami, Abdul Hai & Abdelkareem, Mohammad Ali & Faraj, Mohammed & Aokal, Kamilia & Al Safarini, Nada, 2020. "Titanium dioxide-coated nickel foam photoelectrodes for direct urea fuel cell applications," Energy, Elsevier, vol. 208(C).
    • Handle: RePEc:eee:energy:v:208:y:2020:i:c:s0360544220313608
    DOI: 10.1016/j.energy.2020.118253
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    References listed on IDEAS

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    1. Gude, Veera Gnaneswar, 2015. "Energy and water autarky of wastewater treatment and power generation systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 45(C), pages 52-68.
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    1. A.G. Olabi & Tabbi Wilberforce & Enas Taha Sayed & Khaled Elsaid & Mohammad Ali Abdelkareem, 2020. "Prospects of Fuel Cell Combined Heat and Power Systems," Energies, MDPI, vol. 13(16), pages 1-20, August.
    2. Alami, Abdul Hai & Aokal, Kamilia & Faraj, Mohammed, 2020. "Investigating nickel foam as photoanode substrate for potential dye-sensitized solar cells applications," Energy, Elsevier, vol. 211(C).
    3. A. G. Olabi & Tabbi Wilberforce & Khaled Elsaid & Tareq Salameh & Enas Taha Sayed & Khaled Saleh Husain & Mohammad Ali Abdelkareem, 2021. "Selection Guidelines for Wind Energy Technologies," Energies, MDPI, vol. 14(11), pages 1-34, June.
    4. Eisa, Tasnim & Park, Sung-Gwan & Mohamed, Hend Omar & Abdelkareem, Mohammad Ali & Lee, Jieun & Yang, Euntae & Castaño, Pedro & Chae, Kyu-Jung, 2021. "Outstanding performance of direct urea/hydrogen peroxide fuel cell based on precious metal-free catalyst electrodes," Energy, Elsevier, vol. 228(C).

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