Jump to main content
Jump to site search

Issue 43, 2013
Previous Article Next Article

Uniform epitaxial growth of Pt on Fe3O4 nanoparticles; synergetic enhancement to Pt activity for the oxygen reduction reaction

Author affiliations

Abstract

A synthetic strategy for achieving uniform shell-like epitaxial growth of Pt on Fe3O4 nanoparticles is introduced. The method involves the controlled high-density loading of Pt2+ by the linear growth of repeatedly stacked units of [Pt(NH2OH)4]2+ and [PtCl4]2−, followed by a subsequent reduction step. In comparison to commercial Pt-based fuel cell catalysts, the resulting Pt–Fe3O4 hybrid nanostructures were found to exhibit improved Pt specific activity for the electroreduction of oxygen in alkaline media, which is attributed to charge transfer from Fe3O4 to Pt. The Pt shell-type structure of the Pt–Fe3O4 hybrids was found to protect the Fe3O4 cores from corrosion, thus ensuring catalyst stability. A uniform Pt coating was also deposited evenly over SiO2 microspheres using this method, thus demonstrating its potential as a general strategy for platinum deposition on essentially any amine-functionalized surface.

Graphical abstract: Uniform epitaxial growth of Pt on Fe3O4 nanoparticles; synergetic enhancement to Pt activity for the oxygen reduction reaction

Back to tab navigation

Supplementary files

Publication details

The article was received on 31 Jul 2013, accepted on 28 Aug 2013 and first published on 29 Aug 2013


Article type: Paper
DOI: 10.1039/C3TA12987J
Citation: J. Mater. Chem. A, 2013,1, 13443-13453
  •   Request permissions

    Uniform epitaxial growth of Pt on Fe3O4 nanoparticles; synergetic enhancement to Pt activity for the oxygen reduction reaction

    D. A. Robinson and K. J. Stevenson, J. Mater. Chem. A, 2013, 1, 13443
    DOI: 10.1039/C3TA12987J

Search articles by author

Spotlight

Advertisements