Improvement of DMFC Electrode Kinetics by Using Nanohorns Catalyst Support
| Autor: | D. Mirabile Gattia, M. Vittori Antisari, Lúcia Brandão, Silvia Licoccia, Enrico Traversa, Alessandra D'Epifanio, Adélio Mendes, Renzo Marazzi |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Settore ING-IND/22 - Scienza e Tecnologia dei Materiali Catalyst support Carbon support Carbon nanotubes chemistry.chemical_element Catalyst supports Carbon nanotube Catalysis law.invention Arc-discharge method Small-diameter Ethylene chemistry.chemical_compound Methanol fuels Single-walled carbon nanotubes (SWCN) Carbon black law Kinetics of methanol oxidation General Materials Science Single Wall Composite material Methanol fuel Ethylene glycol Platinum Electrode catalysts Self-assembling materials Catalyst nanoparticle Methanol Mechanical Engineering Settore CHIM/07 - Fondamenti Chimici delle Tecnologie Electrocatalysts Condensed Matter Physics Catalytic activity Anode Graphitic structures Chemical engineering chemistry Mechanics of Materials Electrode kinetics Nanohorns Single wall carbon nanohorn Direct methanol fuel cells (DMFC) Electric discharges Small-diameter Carbon black Single-walled carbon nanotubes (SWCN) Catalyst supports Carbon |
| Zdroj: | Materials Science Forum. :1106-1111 |
| ISSN: | 1662-9752 |
| Popis: | One of the factors limiting direct methanol fuel cells (DMFC) performance is the slow kinetics of methanol oxidation at the anode. The importance of the catalyst support for fuel cells has been recognized and different forms of carbon have been suggested. Single wall nanohorns (SWNH) are a new class of carbon with a similar graphitic structure of carbon nanotubes. They are self-assembling materials that produce aggregates of about 100 nm. In the present study, the comparison of the performance of a DMFC equipped with electrocatalysts supported on a commercial carbon black and on SWNH was carried out. The SWNH were synthesized by the arc discharge method in air. The deposition of the Pt and Pt/Ru catalysts on the carbon supports was accomplished by using ethylene glycol as reducing agent. The synthesized catalyst nanoparticles have a very small diameter size (ca. 2.5 nm) and they are uniformly distributed on both carbon supports. The supported electrode catalysts were tested in a DMFC and results indicate that employing SWNH is very promising showing catalytic activities 60 % higher. |
| Databáze: | OpenAIRE |
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