Use of single wall carbon nanohorns in polymeric electrolyte fuel cells |
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Authors: | Lúcia Brandão Carolina Passeira Daniele Mirabile Gattia Adélio Mendes |
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Affiliation: | 1.Laboratório de Engenharia de Processos, Ambiente e Energia (LEPAE), Faculdade de Engenharia do Porto, Rua Roberto Frias,Porto,Portugal;2.MAT-COMP, ENEA,Rome,Italy |
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Abstract: | Single wall carbon nanohorns (SWNH), produced by AC arc discharge in air, were used as Pt and PtRu supports in polymer electrolyte
membrane fuel cells (PEMFC). These electrocatalysts were compared with equivalent electrocatalysts supported on commercial
carbon back. The SWNH were characterized by differential thermal analysis (DTA), TEM, SEM, and XRD. The produced SWNH were
84.5 wt% pure, containing 3 wt% of amorphous carbon and 12.5 wt% of graphitic carbon. SWNH were used as electrocatalyst supports
and tested in the electrodes of two types of polymer electrolyte fuel cells: H2-fed PEMFC and direct methanol fuel cells (DMFC). The electrocatalyst nanoparticles anchored on both carbon supports were
ca. 2.5 nm in diameter obtained by employing ethylene glycol as the reducing agent. The use of SWNH showed catalytic activities
60% higher than using carbon black as the electrocatalyst support in both types of fuel cells. |
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