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Electrocatalytic O2 reduction at glassy carbon electrodes modified with dendrimer-encapsulated Pt nanoparticles.

Authors
  • Ye, Heechang
  • Crooks, Richard M
Type
Published Article
Journal
Journal of the American Chemical Society
Publication Date
Apr 06, 2005
Volume
127
Issue
13
Pages
4930–4934
Identifiers
PMID: 15796558
Source
Medline
License
Unknown

Abstract

Platinum dendrimer-encapsulated nanoparticles (DENs) were prepared within fourth-generation, hydroxyl-terminated, poly(amidoamine) dendrimers and immobilized on glassy carbon electrodes using an electrochemical coupling strategy. X-ray photoelectron spectroscopy, electron microscopy, and electrochemical experiments confirmed that the Pt DENs were about 1.4 nm in diameter and that they remained within the dendrimer following surface immobilization. The resulting Pt DEN films were electrocatalytically active for the oxygen reduction reaction. The films were also robust, surviving up to 50 consecutive cyclic voltammograms and sonication.

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