Abstract
A simple and easy sol-gel approach has been developed to directly synthesize in situ three-dimensionally interconnected uniform ordered bimodal porous silica (BPS) incorporating both the macroporosity and mesoporosity in the lattice without extra synthesis process performed in previous work. Multimodal porous carbon (MPC) was fabricated through the inverse replication of the BPS. The unique structural characteristics such as well-developed 3-D interconnected ordered macropore framework with open mesopores embedded in the macropore walls, large surface area (1120 m2 g-1) and mesopore volume (1.95 cm3 g-1) make MPC very attractive as an anode catalyst support in polymer exchange membrane fuel cell. The MPC-supported Pt-Ru alloy catalyst has demonstrated much higher power density toward hydrogen oxidation than the commercial carbon black Vulcan XC-72-supported ones.
Original language | English |
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Pages (from-to) | 7628-7633 |
Number of pages | 6 |
Journal | Electrochimica Acta |
Volume | 55 |
Issue number | 26 |
DOIs | |
State | Published - 1 Nov 2010 |
Bibliographical note
Funding Information:Authors would like to thank the Korea Institute for Advancement of Technology (KIAT) through the Human Resource Training Project for Regional Innovation and WCU Program (R31-10035) for financial support and the Korean Basic Science Institute at Jeonju, Chuncheon and Daejeon for SEM, TEM and XRD measurements.
Keywords
- Anode
- Catalyst support
- Multimodal porous carbon
- Proton exchange membrane fuel cell
- Pt-Ru