Jump to main content
Jump to site search

Issue 1, 2008
Previous Article Next Article

Niobium oxide-supported platinum ultra-low amount electrocatalysts for oxygen reduction

Author affiliations

Abstract

We demonstrate a new approach to synthesizing high-activity electrocatalysts for the O2reduction reaction with ultra low Pt content. The synthesis involves placing a small amount of Pt, the equivalent of a monolayer, on carbon-supported niobium oxide nanoparticles (NbO2 or Nb2O5). Rotating disk electrode measurements show that the Pt/NbO2/C electrocatalyst has three times higher Pt mass activity for the O2reduction reaction than a commercial Pt/C electrocatalyst. The observed high activity of the Pt deposit is attributed to the reduced OH adsorption caused by lateral repulsion between PtOH and oxide surface species. The new electrocatalyst also exhibits improved stability against Pt dissolution under a potential cycling regime (30 000 cycles from 0.6 V to 1.1 V). These findings demonstrate that niobium-oxide (NbO2) nanoparticles can be adequate supports for Pt and facilitate further reducing the noble metal content in electrocatalysts for the oxygen reduction reaction.

Graphical abstract: Niobium oxide-supported platinum ultra-low amount electrocatalysts for oxygen reduction

Back to tab navigation

Publication details

The article was received on 29 Jun 2007, accepted on 17 Oct 2007 and first published on 05 Nov 2007


Article type: Paper
DOI: 10.1039/B709893F
Citation: Phys. Chem. Chem. Phys., 2008,10, 159-167
  •   Request permissions

    Niobium oxide-supported platinum ultra-low amount electrocatalysts for oxygen reduction

    K. Sasaki, L. Zhang and R. R. Adzic, Phys. Chem. Chem. Phys., 2008, 10, 159
    DOI: 10.1039/B709893F

Search articles by author

Spotlight

Advertisements