Abstract
Carbon-supported metal nanoclusters as fuel-cell catalyst electrodes were prepared by a chemical method of H2PtCl6 reduction on acid/base-treated carbon blacks (CBs). The size and the loading efficiency of the metal clusters were dependent on the preparation method and the surface characteristics of the CBs. In the process of catalyst preparation, the NaOH concentration was a critical factor in obtaining Pt nanoclusters of small size and high loading efficiency. When the NaOH concentration was 1.0 M, carbon-supported Pt nanoclusters of 3.1 nm average size and 90% loading efficiency were obtained. The Pt clusters deposited on base-treated CBs showed the smallest particle size, 2.65 nm, and the highest loading efficiency, 97%. By contrast, the Pt clusters were ineffectively deposited on acid-treated CBs. Accordingly, the Pt catalysts deposited on the base-treated CBs showed enhanced electroactivity compared with those deposited on virgin CBs.
| Original language | English |
|---|---|
| Pages (from-to) | 3013-3021 |
| Number of pages | 9 |
| Journal | Electrochimica Acta |
| Volume | 52 |
| Issue number | 9 |
| DOIs | |
| State | Published - 15 Feb 2007 |
Bibliographical note
Funding Information:This paper was performed for the Hydrogen Energy R&D Center, one of the 21st Century Frontier R&D Program, funded by the Ministry of Science and Technology of Korea.
Keywords
- Acid/base treatments
- Carbon supports
- Electroactivity
- Fuel cells
- Nanoclusters
- Platinum catalysts