Abstract
Ordered mesoporous carbon-silica composites, were synthesized via direct-templating method using soluble phenolic resins as carbon sources, tetrabutyl orthosilicate as SiO 2 precursors and triblock copolymer F127 as the structure-directing agent. The structure and the corresponding electrocatalytic activity of carbon-silica composites with various silica contents are systematically investigated. Textual characterization results show that the ordered mesoporous structure of carbon-silica composite with trace SiO 2 is well preserved. The electrochemical properties of the supported catalysts were studied by cyclic voltammogram, revealing that ordered mesoporous carbon-silica composites as the support possess excellent electrochemical performance for hydrogen oxidation. The electrochemical active surface area of carbon-silica supported Pt nanoparticles can achieve 63.8 m 2/g, which is about 7-fold that of non-silica supported Pt catalyst.
| Original language | English |
|---|---|
| Pages (from-to) | 318-322 |
| Number of pages | 5 |
| Journal | Electrochimica Acta |
| Volume | 63 |
| DOIs | |
| State | Published - 29 Feb 2012 |
| Externally published | Yes |
Keywords
- Carbon-silica composites
- Direct-templating method
- Electrocatalytic activity
- Ordered