| Téléchargement | - Voir le manuscrit accepté : Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells (PDF, 1.1 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1016/j.jpowsour.2010.05.038 |
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| Auteur | Rechercher : Fatih, K.1; Rechercher : Neburchilov, V.1; Rechercher : Alzate, V.1; Rechercher : Neagu, R.1; Rechercher : Wang, H.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut d'innovation en piles à combustible du CNRC
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| Format | Texte, Article |
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| Sujet | direct ethanol fuel cells; ethanol sensor; ethanol electro-oxidation; quaternary catalysts; durability; platinum alloys |
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| Résumé | To find a more durable anode with high performance for direct ethanol fuel cells (DEFCs), the present study investigates a series of quaternary electrocatalysts, Pt₃₀Ru₃₀Ir₄₀₋ₓSnₓ/C (wt.%), for the ethanol electro-oxidation reaction (EOR). The carbon-supported Pt₃₀Ru₃₀Ir₄₀₋ₓSnₓ/C electrocatalysts were prepared by a known impregnation-reduction (borohydride) method. The microstructure and chemical composition were determined by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM). The activity of the electrocatalysts for EOR was compared to commercial Pt₆₇Ru₃₃/C (HISPEC5000) using linear sweep voltammetry (LSV) based on similar Pt loading. The results of this study show that electrocatalyst composition with 10 and 20% Ir (wt.%) exhibit higher electrocatalytic activity than the commercial PtRu electrocatalyst. The single fuel cell testing at 90°C comparing Pt₃₀Ru₃₀Ir₄₀₋ₓSnₓ/C to commercial Pt₆₆Ru₃₃/C and Pt₈₃Sn₁₇/C anodes showed an enhancement of Pt activity (normalized to Pt loading) in the following order: Pt₃₀Ru₃₀Ir₁₀Sn₃₀ >Pt₃₀Ru₃₀Sn₄₀ Pt₃₀Ru₃₀Ir₄₀ Pt₈₃Sn₁₇ >Pt₆₇Ru₃₃. After a long-term performance test, the activity changed to the following order: Pt₃₀Ru₃₀Ir₁₀Sn₃₀ >Pt₃₀Ru₃₀Ir₄₀ >Pt₃₀Ru₃₀Sn₄₀ > Pt₈₃Sn₁₇ >Pt₆₇Ru₃₃. Pt₃₀Ru₃₀Ir₁₀Sn₃₀/C exhibited both a higher performance with a specific power density of 29mWmgₚₜ⁻¹ without O₂ backpressure at the cathode and an excellent long-term stability in a DEFC operating at 90°C. |
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| Date de publication | 2010-06-01 |
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| Maison d’édition | Elsevier |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 16925465 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 76450a1e-3723-4020-aa0b-333861520ccc |
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| Enregistrement créé | 2011-02-25 |
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| Enregistrement modifié | 2020-04-17 |
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