Abstract
Atomic layer deposition (ALD) is a thin layer synthesis method applied in this study for preparing carbon-supported mono-metallic Pt- and bi-metallic PtCo catalysts. The catalyst characterization confirmed that small metal particles with a narrow particle size distribution and high metal dispersion were obtained. The location of the metals on the surface was controlled by alternating the ALD cycles, and the formation of bi-metallic PtCo particles on the support was observed. The prepared catalysts proved to be active for methanol oxidation and oxygen reduction in an acidic media. In addition, the durability of the catalysts in electrochemical oxidation was enhanced by varying the metal cycle order in the catalyst preparation. After the deposition of Co on the catalyst, one ALD cycle of Pt favored the catalyst durability in the methanol oxidation reaction.
| Original language | English |
|---|---|
| Pages (from-to) | 11-21 |
| Number of pages | 11 |
| Journal | Applied Catalysis. B, Environmental |
| Volume | 148-149 |
| DOIs | |
| Publication status | Published - 27 Apr 2014 |
| Externally published | Yes |
Funding
Heidi Meriö-Talvio is acknowledged for carrying out the chemisorption measurements. The CNB-E project, which is part of the Multidisciplinary Institute of Digitalization and Energy (MIDE) program, is acknowledged for its financial support. The authors acknowledge the Laboratory of Inorganic Chemistry at Aalto University for providing us with access to X-ray diffraction equipment and Mr. Matti Lehtimäki for his assistance with the measurements. Marta C. Figueiredo and Tanja Kallio acknowledge financial support from Aalto University . Appendix A
Keywords
- Atomic layer deposition
- Catalyst preparation
- Direct methanol fuel cell
- Methanol oxidation
- Oxygen reduction reaction