Binary Fe-Co alloy nanoparticles showing significant enhancement in electrocatalytic activity compared with bulk alloys

Jahangeer Ahmed, Bharat Kumar, Amos M. Mugweru, Phong Trinh, Kandalam V. Ramanujachary, Samuel E. Lofland, Govind, Ashok K. Ganguli

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

Microemulsion-based synthesis of Fe-Co alloy nanoparticles has been reported for the first time. Spherical, uniform, and highly monodisperse nanoparticles of Fe75Co25, Fe67Co33, Fe50Co50, and Fe33Co67 with an average size of 20, 25, 10, and 40 nm, respectively, were synthesized. These nanoparticles crystallize in a body-centered cubic cell. A higher cobalt content led to the formation of biphasic mixtures. Energy-dispersive X-ray spectroscopy studies confirmed the Fe/Co ratios. Nanoparticles of the Fe33Co 67 alloy show higher hydrogen and oxygen evolution efficiencies (over 100 times) compared with other Fe-Co alloys of nanocrystalline or bulk form. The Fe-Co alloy nanoparticles also show ferromagnetism.

Original languageEnglish (US)
Pages (from-to)18779-18784
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number44
DOIs
StatePublished - Nov 11 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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