Affordable Access

Access to the full text

A novel method for the preparation of bi-metallic (Pt–Au) nanoparticles on boron doped diamond (BDD) substrate: application to the oxygen reduction reaction

Authors
  • El Roustom, B.1, 2
  • Siné, G.1
  • Fóti, G.1
  • Comninellis, Ch.1, 2
  • 1 Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering, Lausanne, 1015, Switzerland , Lausanne (Switzerland)
  • 2 EPFL-SB-ISIC-GGEC, Station 6, Building CH, Lausanne, 1015, Switzerland , Lausanne (Switzerland)
Type
Published Article
Journal
Journal of Applied Electrochemistry
Publisher
Springer Netherlands
Publication Date
Sep 08, 2007
Volume
37
Issue
11
Pages
1227–1236
Identifiers
DOI: 10.1007/s10800-007-9359-4
Source
Springer Nature
Keywords
License
Yellow

Abstract

A novel method was developed to synthesize bi-metallic nanoparticles (Au–Pt) on boron-doped diamond (BDD) substrate. This method consisted of (a) deposition of a small amount of gold (equivalent to a few monolayers) by sputtering on the BDD surface, (b) heat treatment of the obtained sample at 600 °C in air, resulting in the formation of stable nanoparticles on BDD (Au/BDD electrode), (c) electrodeposition of Pt on the Au/BDD surface occurring preferentially on the Au nanoparticles, and finally (d) heat treatment at 400 °C to enhance the interaction between Au and Pt. The ratio between Au and Pt nanoparticles can be modified by modifying the amount of electrodeposited Pt and was estimated using cyclic voltammetry. These Pt-Au/BDD composite electrodes were used to study oxygen reduction using both potential sweep (cyclic voltammetry) and hydrodynamic (turbine electrochemical cell) methods.

Report this publication

Statistics

Seen <100 times