A new approach based on pulse electrodeposition is demonstrated to be an attractive technique to replace conventional powder type membrane electrode assembly (MEA) preparation methods. The performance of the catalyst layer is optimized by controlling the pulse deposition parameters such as the peak current density, duty cycle and the total charge density. The peak current density and the pulse duty cycle are found to control the nucleation rate and decrease the catalyst dendric growth. The amount of platinum loading is controlled by the total charge density. Preparing the electrode using a peak current density of 400mA/cm2, a duty cycle of 2.9% and a total charge density of 8 C/cm2 results in a high catalyst performance of 380 mA/cm2 at 0.8 V.
|Number of pages||11|
|Journal||Journal of Power Sources|
|Publication status||Published - 2004 Nov 15|
Bibliographical noteFunding Information:
Financial support provided by DOE is acknowledged gratefully.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering