Preparation of Carbon Supported Nanosegregated Pt Alloy Catalysts for the Oxygen Reduction Reaction Using a Silica Encapsulation Process to Inhibit Sintering Effect During Heat Treatment
- Preparation of Carbon Supported Nanosegregated Pt Alloy Catalysts for the Oxygen Reduction Reaction Using a Silica Encapsulation Process to Inhibit Sintering Effect During Heat Treatment
- 오형석; 오종길; 이웅희; 김한성
- Issue Date
- Journal of materials chemistry
- VOL 22, NO 30-15220
- The heat treatment of alloy nanoparticles to improve their catalytic properties generally results in severe sintering. In this study, we report a new synthetic process of silica encapsulation to inhibit the sintering of Pt3Co1 alloy particles during heat treatment at high temperature. The silica layer acts as a physical barrier to prevent sintering; thus, the carbon-supported Pt3Co1 alloy nanoparticles retained their small particle size after heat treatment. The heat treatment allows the atoms to rearrange themselves, which results in a Pt-rich surface of the alloy nanoparticles. As a result, catalytic activity and stability were improved significantly.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.