| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 182034 | Electrochemistry Communications | 2008 | 4 Pages |
Abstract
Nanostructures containing Pt-flecks on Ag colloids (Pt^Ag) were prepared by Pt deposition from citrate reduction of PtIVCl62- or PtIICl42- ions. The nanostructures prepared from PtIVCl62- showed more or less Pt–Ag alloying due to the galvanic replacement reaction between PtIVCl62- and metallic Ag colloids. The Pt–Ag alloying at the surface of Ag colloids was manipulated by tuning the atomic Pt/Ag ratio (m) during preparation. It was demonstrated that a proper Pt–Ag alloying in a narrow composition window (0.47 ⩽ m ⩾ 0.53) can led to a dramatic activity enhancement of Pt, up to one order of magnitude higher, for methanol electro-oxidation.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Dan Zhao, Bing Yan, Bo-Qing Xu,