A composite of graphitic carbon nitride and Vulcan carbon as an effective catalyst support for Ni in direct urea fuel cells

Hussain Alawadhi*, Mohammad Ali Abdelkareem, Najrul Hussain, Tabbi Wilberforce, Enas Taha Sayed

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A g-C3N4/VC composite material comprising of graphitic carbon nitride (g-C3N4) and Vulcan carbon (VC) with different ratios, i.e., 2:1, 1:1, and 1:2 were prepared through hydrothermal method without using any additives. These composite materials were further utilized as a support for Ni(OH)2 nanoparticles. These materials formed new type of Ni/(g-C3N4/VC) composite materials. The SEM images show the sheet-like structure of the graphitic carbon nitride. Although Ni nanoparticles' electrochemical activity over the surface for graphitic carbon nitride was slightly more compared to Ni supported on the Vulcan carbon, the Ni supported on the different composite supports demonstrated an outstanding activity compared with that over the single supports. Among the different composite ratios of the graphitic carbon nitride to the Vulcan carbon, the one with high Vulcan carbon, i.e., 2:1, exhibited the best performance that is nine-times the current density in comparison to that of Ni over Vulcan carbon at 0.5 V using 2 M urea in 1 M potassium hydroxide. The stability for the prepared Ni over the composite support was high, where the degradation in the current density for more than 2 hours was negligible.

Original languageEnglish
Pages (from-to)160-168
Number of pages9
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume116
Early online date28 Nov 2020
DOIs
Publication statusPublished - Nov 2020

Bibliographical note

Funding Information:
The authors appreciate the University of Sharjah for the support of this work through project No. 16020406129.

Keywords

  • catalyst support
  • Graphitic carbon nitride
  • Graphitic carbon nitride composite with Vulcan carbon
  • Ni(OH) nanoparticles
  • Urea fuel cell
  • Urea oxidation

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