On the mechanism of ethanol electro-oxidation on Pt and PtSn catalysts: electrochemical and in situ IR reflectance spectroscopy studies

Vigier, F.; Coutanceau, Christophe; Hahn, F.; Belgsir, E.M.; Lamy, C.

doi:10.1016/j.jelechem.2003.08.019

Cited by 532 publications

(383 citation statements)

References 55 publications

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“…Furthermore, ethanol is relatively safer than methanol and has a higher theoretical mass energy than methanol (8 kWh kg −1 vs. 6.1 kWh kg −1 ) [1]. The mechanism of a complete ethanol electro-oxidation reaction (EOR) involves 12 electrons and the breaking of a C-C bond, in contrast to methanol electro-oxidation, which involves only six electrons and no C-C bond breaking on a similar type of anode material.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells

Fatih

Neburchilov

Alzate

et al. 2010

Journal of Power Sources

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Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells Fatih, K.; Neburchilov, V.; Alzate, V.; Neagu, R.; Wang, H. 195 (2010) [7168][7169][7170][7171][7172][7173][7174][7175] Contents lists available at ScienceDirect /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 Pt 67 Ru 33 /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. 10 Sn 30 /C exhibited both a higher performance with a specific power density of 29 mW mg Pt −1 without O 2 backpressure at the cathode and an excellent long-term stability in a DEFC operating at 90 • C. Journal of Power Sources Journal of Power SourcesCrown

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells

Fatih

Neburchilov

Alzate

et al. 2010

Journal of Power Sources

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“…The voltammograms of the electrocatalysts did not display a well-defined hydrogen (Fig. 5b) do not behave as an appropriate anode for EOR due to its poisoning by strongly adsorbed intermediates such as CO ads [40]. However, the introduction of Sn and Ni promotes the electrocatalytic activity.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Nanometals (Ni and Sn) in Platinum-Based Ternary Electrocatalysts for Ethanol Electro-oxidation in Membraneless Fuel Cells

Ponmani

Kiruthika

Muthukumaran

2015

Journal of Electrochemical Science and Technology

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In the present work, Carbon supported Pt 100 , Pt 80 Sn 20 , Pt 80 Ni 20 and Pt 80 Sn 10 Ni 10 electrocatalysts with different atomic ratios were prepared by ethylene glycol-reduction method to study the electro-oxidation of ethanol in membraneless fuel cell. The electrocatalysts were characterized in terms of structure, morphology and composition by using XRD, TEM and EDX techniques. Transmission electron microscopy measurements revealed a decrease in the mean particle size of the catalysts for the ternary compositions.

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“…It was also observed that at the first cycle, the hydrogen features do not seem to reflect a blocking of Pt sites because of the presence of absorbed CO. A shift to lower potentials of the onset potential of the CO oxidation was seen for the Pt 3 Sn/C compared with Pt-ETEK/C, although the current density is higher for the Pt-ETEK/C. The bi-functional mechanism seems to operate on the bi metallic Pt 3 Sn/C catalyst because of formation of oxygenated species onto Sn (Vigier, Coutanceau et al, 2004). In addition, the oxidation of CO absorbed occurs over a larger potential on Pt 3 Sn/C compared to Pt-ETEK.…”

Section: Electrochemical Experimentsmentioning

confidence: 87%

A Pt3Sn/C Electrocatalyst Used as the Cathode and Anode in a Single Direct Ethanol Fuel Cell

Parreira¹,

Rascio²,

Silva³

et al. 2012

IJC

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This paper presents a study involving the use of Pt 3 Sn/C electrocatalysts as cathodes and anodes in a single direct ethanol fuel cell. First, we studied the oxygen reduction reaction (ORR) using commercial Pt/C from ETEK and Pt 3 Sn/C as electrocatalysts with an alloy degree of 92 %. The electrocatalytic activity of the material for oxygen reduction was assessed using the rotating disk electrode technique (RDE). When Pt 3 Sn was tested for ORR in the presence of ethanol, the results showed greater tolerance to the cross-over effect than Pt/C in the electrochemical cell. The experiments in a single direct ethanol fuel cell showed that without oxygen pressurization of the cell, the maximum power density is higher using Pt 3 Sn/C as both cathode and anode than using Pt 3 Sn as an anode and Pt/C as a cathode. When using Pt 3 Sn/C as both the cathode and anode in a direct ethanol fuel cell, cell performance enhances.

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On the mechanism of ethanol electro-oxidation on Pt and PtSn catalysts: electrochemical and in situ IR reflectance spectroscopy studies

Cited by 532 publications

References 55 publications

Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells

Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells

Investigation of Nanometals (Ni and Sn) in Platinum-Based Ternary Electrocatalysts for Ethanol Electro-oxidation in Membraneless Fuel Cells

A Pt3Sn/C Electrocatalyst Used as the Cathode and Anode in a Single Direct Ethanol Fuel Cell

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