Abstract
We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts' inadequate activity and high Pt content.
| Original language | English |
|---|---|
| Pages (from-to) | 2645-2652 |
| Number of pages | 8 |
| Journal | Electrochimica Acta |
| Volume | 55 |
| Issue number | 8 |
| DOIs | |
| State | Published - Mar 1 2010 |
Funding
This work is supported by U.S. Department of Energy , Divisions of Chemical and Material Sciences under the Contract No. DE-AC02-98CH10886 , and Toyota Motor Corporation under the CRADA No. BNL-C-05-09 . The authors thank A.I. Frenkel for helpful discussion of the EXAFS analysis.
| Funders | Funder number |
|---|---|
| Divisions of Chemical and Material Sciences | DE-AC02-98CH10886 |
| U.S. Department of Energy | |
| Toyota Motor Corporation | BNL-C-05-09 |
Keywords
- Electrocatalysis
- Fuel cells
- Oxygen reduction
- Platinum
