S-doped carbon aerogels/GO composites as oxygen reduction catalysts

Mykola Seredych, K. László, Enrique Rodríguez-Castellón, Teresa J. Bandosz

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Composites of carbon aerogel and graphite oxide (GO) were synthesized using a self-assembly method based on dispersive forces. Their surface was modified by treatment in hydrogen sulfide at 650 and 800°C. The samples obtained were characterized by adsorption of nitrogen, TA-MS, XPS, potentiometric titration, and HRTEM and tested as catalysts for oxygen reduction reactions (ORR) in an alkaline medium. The synergistic effect of the composite (electrical conductivity, porosity and surface chemistry) leads to a good ORR catalytic activity. The onset potential for the composite of carbon aerogel heated at 800°C is shifted to a more positive value and the number of electron transfer was 2e- at the potential 0.68V versus RHE and it increased to 4e- with an increase in the negative values of the potential. An excellent tolerance to methanol crossover was also recorded.

Original languageEnglish
JournalJournal of Energy Chemistry
DOIs
Publication statusAccepted/In press - Oct 12 2015

Fingerprint

Aerogels
Graphite
Oxides
Carbon
Oxygen
Catalysts
Composite materials
Hydrogen Sulfide
Hydrogen sulfide
Surface chemistry
Titration
Self assembly
Methanol
Catalyst activity
Nitrogen
X ray photoelectron spectroscopy
Porosity
Adsorption
Electrons

Keywords

  • Carbon aerogel/GO composites
  • Oxygen reduction reaction
  • Porosity
  • Specific interactions
  • Surface chemistry

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Fuel Technology
  • Electrochemistry

Cite this

S-doped carbon aerogels/GO composites as oxygen reduction catalysts. / Seredych, Mykola; László, K.; Rodríguez-Castellón, Enrique; Bandosz, Teresa J.

In: Journal of Energy Chemistry, 12.10.2015.

Research output: Contribution to journalArticle

Seredych, Mykola ; László, K. ; Rodríguez-Castellón, Enrique ; Bandosz, Teresa J. / S-doped carbon aerogels/GO composites as oxygen reduction catalysts. In: Journal of Energy Chemistry. 2015.
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