Pt–Sn/C catalysts prepared by sodium borohydride reduction for alcohol oxidation in fuel cells: Effect of the precursor addition order
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Title: | Pt–Sn/C catalysts prepared by sodium borohydride reduction for alcohol oxidation in fuel cells: Effect of the precursor addition order |
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Authors: | López Suárez, Franz Edwin | Bueno López, Agustín | Eguiluz, Katlin Ivon Barrios | Salazar Banda, Giancarlo Richard |
Research Group/s: | Materiales Carbonosos y Medio Ambiente |
Center, Department or Service: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Keywords: | Platinum | Tin | Ethanol Oxidation Reaction | Electrocatalysis | Fuel Cell |
Knowledge Area: | Química Inorgánica |
Issue Date: | 16-Jun-2014 |
Publisher: | Elsevier |
Citation: | Journal of Power Sources. 2014, Accepted Manuscript. doi:10.1016/j.jpowsour.2014.06.042 |
Abstract: | A series of Pt–Sn/C catalysts used as anodes during ethanol oxidation are synthesized by a deposition process using NaBH4 as the reducing agent. The order in which the precursors are added affects the electrocatalytic activity and physical-chemical characteristics of the bimetallic catalysts, where the Pt–Sn catalyst prepared by co-precipitation of both metals functions best below a potential of 0.5 V and the catalyst prepared by sequential deposition of Sn and Pt (drying after Sn addition) is most active above a potential of 0.5 V. The electrochemical behavior of catalysts during ethanol oxidation in an acidic medium are characterized and monitored in a half-cell test at room temperature by cyclic voltammetry, chronoamperometry and anode potentiostatic polarization. Catalyst structure and chemical composition are investigated by transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). This behavior presented for best Pt–Sn catalyst can be attributed to the so-called bifunctional mechanism and to the electronic interaction between Pt and Sn. |
Sponsor: | The authors thank the Brazilian National Council of Technological and Scientific Development-CNPq (grants: 303630/2012-4, 402243/2012-9 and 310282/2013-6) for the scholarships and financial support for this work. |
URI: | http://hdl.handle.net/10045/38380 |
ISSN: | 0378-7753 (Print) | 1873-2755 (Online) |
DOI: | 10.1016/j.jpowsour.2014.06.042 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1016/j.jpowsour.2014.06.042 |
Appears in Collections: | INV - MCMA - Artículos de Revistas |
Files in This Item:
File | Description | Size | Format | |
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2014_Lopez-Suarez_etal_JPS.pdf | Accepted Manuscript (acceso abierto) | 13,53 MB | Adobe PDF | Open Preview |
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