Studies on Co-based catalysts supported on modified carbon substrates for PEMFC cathodes

Nalini P. Subramanian, Swaminatha P. Kumaraguru, Hector Colon-Mercado, Hansung Kim, Branko N. Popov, Timothy Black, Donna A. Chen

Research output: Contribution to journalArticlepeer-review

167 Citations (Scopus)


Cobalt based non-precious metal catalysts were prepared by supporting cobalt-ethylene diamine complex on carbon followed by a heat treatment at elevated temperatures (800 °C). Surface oxygen groups on carbon were introduced with HNO3 oxidation. Co catalysts supported on oxidized carbon showed improved activity and selectivity towards four-electron reduction of molecular oxygen. Quinone groups introduced by nitric acid treatment, in addition to increasing the dispersion of the chelate complexes, play a role in forming the active site for oxygen reduction.

Original languageEnglish
Pages (from-to)56-63
Number of pages8
JournalJournal of Power Sources
Issue number1
Publication statusPublished - 2006 Jun 19

Bibliographical note

Funding Information:
Financial support by Department of Energy (DOE) is gratefully acknowledged.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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