Manganese oxide/functionalised carbon nanotubes nanocomposite as catalyst for oxygen reduction reaction in microbial fuel cell

Kien Ben Liew, Wan Ramli Wan Daud, Mostafa Ghasemi, Kee Shyuan Loh, Manal Ismail, Swee Su Lim, Jun Xing Leong

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Manganese oxide/functionalised carbon nanotubes (MnO<inf>2</inf>/f-CNT) nanocomposite is believed to be a good catalyst for oxygen reduction reaction (ORR) in a neutral solution; especially in a microbial fuel cell. The unique interaction between MnO<inf>2</inf> and f-CNT will enhance the electron transfer process and facilitate the ORR. MnO<inf>2</inf>/f-CNT nanocomposite was fabricated by in-situ hydrothermal synthesis method. The MnO<inf>2</inf>/f-CNT was characterised by the field emission scanning electron microscope (FESEM). Raman spectra has proved there is more carbon defect on the surface of CNT after functionalization. XRD pattern showed amorphous MnO<inf>2</inf> crystal existed in MnO<inf>2</inf>/f-CNT catalyst. This study further employed cyclic voltammetry (CV) techniques to investigate catalytic activity. Lastly, microbial fuel cell test showed that MnO<inf>2</inf>/f-CNT displayed higher power density (520 mW m<sup>-2</sup>) compared to CNT (275 mW m<sup>-2</sup>) and f-CNT (440 mW m<sup>-2</sup>). Moreover, the coulombic efficiency (28.65%) and COD removal value (86.6%) of MFC with MnO<inf>2</inf>/f-CNT catalyst was higher amongst the three catalysts tested. This study concluded that MnO<inf>2</inf>/f-CNT can be a good catalyst in microbial fuel cell application.

Original languageEnglish
Pages (from-to)11625-11632
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number35
DOIs
Publication statusPublished - 21 Sep 2015

Fingerprint

Microbial fuel cells
Manganese oxide
manganese oxides
fuel cells
Carbon nanotubes
Nanocomposites
nanocomposites
carbon nanotubes
catalysts
Catalysts
Oxygen
oxygen
Hydrothermal synthesis
Field emission
Cyclic voltammetry
Raman scattering
Catalyst activity
Electron microscopes
Scanning
Defects

Keywords

  • Catalyst
  • Cyclic voltammetry
  • Manganese oxide
  • Microbial fuel cell
  • Oxygen reduction reaction

ASJC Scopus subject areas

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

Cite this

Manganese oxide/functionalised carbon nanotubes nanocomposite as catalyst for oxygen reduction reaction in microbial fuel cell. / Liew, Kien Ben; Wan Daud, Wan Ramli; Ghasemi, Mostafa; Loh, Kee Shyuan; Ismail, Manal; Lim, Swee Su; Leong, Jun Xing.

In: International Journal of Hydrogen Energy, Vol. 40, No. 35, 21.09.2015, p. 11625-11632.

Research output: Contribution to journalArticle

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