Non-precious oxygen reduction catalysts prepared by high-pressure pyrolysis for low-temperature fuel cells

R. Kothandaraman, Vijayadurga Nallathambi, Kateryna Artyushkova, Scott Calabrese Barton

Research output: Contribution to journalArticle

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Abstract

Iron-based catalysts for the oxygen reduction reaction (ORR) were produced by pyrolysis of iron-acetate and Ketjenblack® carbon with varying amounts of 2,2′-bipyridine in a closed, constant-volume vessel. The total surface nitrogen content detected by XPS varied from 0.6 to 2.2 at% when the nitrogen precursor loading was varied from 1.5 to 11.3 wt%. The amount of nitrogen in the Fe-pyridinic form is estimated to vary between 0.12 and 0.24 at%, correlating to catalytic activity (current density) variation from 0.07 to 1.9 mA cm-2 at a catalyst loading of 0.5 mg cm-2. These results support the theory that iron associated with pyridinic nitrogen is a component of the catalytic active site responsible for oxygen reduction.

LanguageEnglish (US)
Pages209-216
Number of pages8
JournalApplied Catalysis B: Environmental
Volume92
Issue number1-2
DOIs
StatePublished - Oct 19 2009

Profile

fuel cell
pyrolysis
Fuel cells
Pyrolysis
Nitrogen
catalyst
Oxygen
oxygen
Catalysts
Iron
nitrogen
iron
2,2'-Dipyridyl
Temperature
density current
X-ray spectroscopy
Catalyst activity
acetate
Acetates
vessel

Keywords

  • Electrocatalysis
  • Fuel cells
  • Non-precious catalysts
  • Oxygen reduction reaction
  • Pyrolysis
  • XPS

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

Cite this

Non-precious oxygen reduction catalysts prepared by high-pressure pyrolysis for low-temperature fuel cells. / Kothandaraman, R.; Nallathambi, Vijayadurga; Artyushkova, Kateryna; Barton, Scott Calabrese.

In: Applied Catalysis B: Environmental, Vol. 92, No. 1-2, 19.10.2009, p. 209-216.

Research output: Contribution to journalArticle

Kothandaraman, R. ; Nallathambi, Vijayadurga ; Artyushkova, Kateryna ; Barton, Scott Calabrese. / Non-precious oxygen reduction catalysts prepared by high-pressure pyrolysis for low-temperature fuel cells. In: Applied Catalysis B: Environmental. 2009 ; Vol. 92, No. 1-2. pp. 209-216
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