Issue 43, 2013

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

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

Supplementary files

Article information

Article type
Paper
Submitted
31 Jul 2013
Accepted
28 Aug 2013
First published
29 Aug 2013

J. Mater. Chem. A, 2013,1, 13443-13453

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

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements