| Download | - View accepted manuscript: Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells (PDF, 1.1 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.jpowsour.2010.05.038 |
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| Author | Search for: Fatih, K.1; Search for: Neburchilov, V.1; Search for: Alzate, V.1; Search for: Neagu, R.1; Search for: Wang, H.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Fuel Cell Innovation
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| Format | Text, Article |
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| Subject | direct ethanol fuel cells; ethanol sensor; ethanol electro-oxidation; quaternary catalysts; durability; platinum alloys |
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| Abstract | 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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| Publication date | 2010-06-01 |
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| Publisher | Elsevier |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 16925465 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 76450a1e-3723-4020-aa0b-333861520ccc |
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| Record created | 2011-02-25 |
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| Record modified | 2020-04-17 |
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