Abstract
Current state-of-the-art anode catalyst materials do not exhibit the needed catalytic activity and durability for commercial deployment of low temperature direct-methanol fuel cells (DMFCs). One route to enhance both methanol oxidation activity and long-term durability of supported Pt-Ru materials is to engineer functionalized support materials to stabilize the active catalyst particles. Previously, we have shown that carbon-based catalyst support materials can be doped with nitrogen via an ion-implantation procedure. The resulting C-N type interactions can be utilized to create strong, beneficial catalyst-support interactions, which substantially enhance catalyst activity and stability. A new class of fuel cell catalyst materials consisting of a nitrogen implanted carbon support followed by Pt-Ru sputter deposition will be evaluated. We will focus on elucidating 1) increased support/catalyst chemical binding (or "tethering"), which results in enhanced durability, and 2) effects that may enhance the methanol oxidation reaction activity. Here, data obtained in half cell as well as 5 cm 2 single cell DMFC configurations will be used to illustrate the effect of N-doped carbon support for Pt-Ru based DMFC anode catalyst materials.
Original language | American English |
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State | Published - 2011 |
Event | 242nd ACS National Meeting and Exposition - Denver, CO, United States Duration: 28 Aug 2011 → 1 Sep 2011 |
Conference
Conference | 242nd ACS National Meeting and Exposition |
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Country/Territory | United States |
City | Denver, CO |
Period | 28/08/11 → 1/09/11 |
NREL Publication Number
- NREL/CP-5200-53283
Keywords
- DMFC performance
- N-doped support materials
- Pt-Ru/C