NiCo Nanoneedles on 3D Carbon Nanotubes/Carbon Foam Electrode as an Efficient Bi-Functional Catalyst for Electro-Oxidation of Water and Methanol

Tung Ngoc Pham*, Ajaikumar Samikannu, Solomon Tesfalidet, Thomas Wågberg, Jyri Pekka Mikkola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

In this study, we report a 3D structured carbon foam electrode assembled from a bifunctional NiCo catalyst, carbon nanotubes (CNT), and a monolith 3D structured carbon foam (CF) as a highly active and stable electrode for oxygen evolution reaction (OER) and methanol oxidation reaction (MOR). When the NiCo@CNTs/CF electrode was used as an anode in OER, after the anodization step, the electrode required a small overpotential of 320 mV to reach the current density of 10 mA cm−2 and demonstrated excellent stability over a long testing time (total 30 h) in 1 M KOH. The as-prepared NiCo@CNTs/CF electrode also exhibited a good performance towards methanol oxidation reaction (MOR) with high current density, 100 mA cm−2 at 0.6 V vs. Ag/AgCl, and good stability in 1 M KOH plus 0.5 M CH3OH electrolyte. The NiCo@CNTs/CF catalyst/electrode provides a potential for application as an anode in water electrolysis and direct methanol fuel cells.

Original languageEnglish
Article number500
JournalCatalysts
Volume11
Issue number4
DOIs
Publication statusPublished - Apr 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Carbon foam
  • CNTs
  • MOR
  • NiCo bi-functional catalyst
  • OER

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