Size-dependent activity of gold nanoparticles for oxygen electroreduction in alkaline electrolyte

Tang, Wei, Lin, Hongfei, Kleiman-Shwarsctein, Alan, Stucky, Galen D. and McFarland, Eric W. (2008) Size-dependent activity of gold nanoparticles for oxygen electroreduction in alkaline electrolyte. Journal of Physical Chemistry C, 112 28: 10515-10519. doi:10.1021/jp710929n


Author Tang, Wei
Lin, Hongfei
Kleiman-Shwarsctein, Alan
Stucky, Galen D.
McFarland, Eric W.
Title Size-dependent activity of gold nanoparticles for oxygen electroreduction in alkaline electrolyte
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
1932-7455
Publication date 2008-07-17
Sub-type Article (original research)
DOI 10.1021/jp710929n
Open Access Status Not Open Access
Volume 112
Issue 28
Start page 10515
End page 10519
Total pages 5
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract The dependence of the kinetics of electrocatalytic oxygen reduction in basic electrolyte on the size of Au nanoparticles was determined for 3 and 7 nm clusters supported on carbon. The size-selected nanoparticles were prepared by reverse micelle encapsulation using PS-P2VP diblock copolymer, and the kinetic current for oxygen reduction was measured with a rotating disk electrode (RDE). The kinetic current was found to be 2.5 times higher for the 3 nm gold nanoparticles compared to the 7 nm gold nanoparticles at 23 °C. The 3 nm particles were found to facilitate four-electron electroreduction, whereas a two-electron electroreduction was inferred from the RDE data on the 7 nm particles. From experiments of the temperature-dependent current the apparent activation energy for the 3 nm clusters was found to be half that of the 7 nm clusters (0.1 and 0.2 eV, respectively).
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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