Nonionic surfactant-templated mesoporous carbon as an electrocatalyst support for methanol oxidation

Reza Zolfaghari, Fakhru'L Razi Ahmadun, Mohamed Rozali Othman, Wan Ramli Wan Daud, Manal Ismail

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Two carbons were synthesized for use as platinum electrocatalyst supports for methanol oxidation. For both materials, furfuryl alcohol was used as the carbon precursor; however, one (CPEG) was made using poly ethylene glycol as the pore former, while the other (CSRF) was produced using Pluronic® F127 as the soft template by organic-organic self-assembly. The CPEG and CSRF carbons were estimated from nitrogen physisorption experiments to be micro- and mesoporous, respectively. Platinum nanoparticles were deposited on each carbon as well as on Vulcan XC-72 carbon by the formic acid reduction method. The physicochemical properties of electrocatalysts were studied using X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray analysis (EDX), and their electrochemical features were examined using cyclic voltammetry, chronoamperometry, and impedance spectroscopy. It was found that higher methanol oxidation peak current densities as well as lesser charge transfer resistance at electrode/electrolyte interface were obtained for Pt supported on CSRF as compared to those on Vulcan XC-72 carbon, owing to the higher specific surface area and larger total pore volume (696 m2 g-1 and 0.60 cm3 g-1, respectively) together with superior electrical conductivity of mesoporous CSRF. On the other hand, the lower surface area and pore volume of microporous CPEG substrate confined Pt nanoparticles deposition and thus made CPEG-supported Pt an inefficient methanol oxidation electrocatalyst.

Original languageEnglish
Pages (from-to)262-269
Number of pages8
JournalMaterials Chemistry and Physics
Volume139
Issue number1
DOIs
Publication statusPublished - 15 Apr 2013

Fingerprint

electrocatalysts
Electrocatalysts
Nonionic surfactants
Catalyst supports
Methanol
Carbon
methyl alcohol
surfactants
Oxidation
oxidation
carbon
formic acid
UCON 50-HB-5100
Platinum
porosity
platinum
furfuryl alcohol
Nanoparticles
Poloxamer
nanoparticles

Keywords

  • Mesoporous carbon
  • Methanol oxidation
  • Nonionic surfactant
  • Organic-organic self-assembly
  • Pt electrocatalysts

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Nonionic surfactant-templated mesoporous carbon as an electrocatalyst support for methanol oxidation. / Zolfaghari, Reza; Ahmadun, Fakhru'L Razi; Othman, Mohamed Rozali; Wan Daud, Wan Ramli; Ismail, Manal.

In: Materials Chemistry and Physics, Vol. 139, No. 1, 15.04.2013, p. 262-269.

Research output: Contribution to journalArticle

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