Effect of alloying degree in PtSn catalyst on the catalytic behavior for ethanol electro-oxidation

Zhu, Mingyuan; Sun, Gongquan; Xin, Qin

doi:10.1016/j.electacta.2008.09.035

Cited by 177 publications

(117 citation statements)

References 29 publications

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“…Two oxidation peaks of ethanol oxidation can be observed on PtSnO 2 (N)/C and PtSnO 2 (M)/C catalysts in the range of 0.2 and 0.8 V, which is in accordance with literature results. 8,23 According to the results reported in the literature, the second oxidation peak (0.7 V) corresponds mainly to the formation of CH 3 COOH, whereas the first oxidation peak (0.36 V) corresponds mainly to the formation of CH 3 CHO. It has been found that CH 3 CHO was formed on Pt surface at potentials lower than 0.6 V (vs. RHE).…”

Section: Resultsmentioning

confidence: 83%

“…Thus, CO-like intermediate residues react with hydroxy radical species in the vicinity of Pt particles to free Pt active sites based on the bifunctional mechanism. 8,9 SnO 2 also improves the cycling stability of Pt-Sn catalysts because of its corrosion-resistant property. However, some investigations determined that SnO 2 nanoparticles are fully coated with the Pt layer.…”

Section: Introductionmentioning

confidence: 99%

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Mesoporous PtSnO2/C Catalyst with Enhanced Catalytic Activity for Ethanol Electro-oxidation

2018

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In this paper, we report the synthesis, characterization, and electrochemical evaluation of a mesoporous PtSnO 2 /C catalyst, called PtSnO 2 (M)/C, with a nominal Pt : Sn ratio of 3 : 1. Brunauer-Emmett-Teller and transmission electron microscopy characterizations showed the obvious mesoporous structure of SnO 2 in PtSnO 2 (M)/C catalyst. X-ray photoelectron spectroscopy analysis exhibited the interaction between Pt and mesoporous SnO 2 . Compared with Pt/C and commercial PtSnO 2 /C catalysts, PtSnO 2 (M)/C catalyst has a lower active site, but higher catalytic activity for ethanol electro-oxidation reaction (EOR). The enhanced activity could be attributed to Pt nanoparticles deposited on mesoporous SnO 2 that could decrease the amount of poisonous intermediates produced during EOR by the interaction between Pt and mesoporous SnO 2 .

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Section: Resultsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Mesoporous PtSnO2/C Catalyst with Enhanced Catalytic Activity for Ethanol Electro-oxidation

2018

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“…However, the addition of Ni to PtSn slightly reduces the exchange current density. Zhu et al [36] reported the exchange current densities of PtSn/C catalysts of 5.38, 2.52 and 0.102 mA cm -2 prepared with different methods that were obtained from anode polarisation curve at 90 o C for PtSn/C-B, PtSn/C-EG and PtSnO2/C, respectively. Exchange current densities were however based on the cross-section of the electrode.…”

Section: Pt-(co)ad + Sn-(oh)ad →Pt-sn + Co2 + Hmentioning

confidence: 99%

Electro-oxidation of Ethanol on Carbon Supported PtSn and PtSnNi Catalysts

Hidayati

Scott

2016

Bull. Chem. React. Eng. Catal.

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Even though platinum is known as an active electro-catalyst for ethanol oxidation at low temperatures (< 100 o C), choosing the electrode material for ethanol electro-oxidation is a crucial issue. It is due to its property which easily poisoned by a strong adsorbed species such as CO. PtSn-based electro-catalysts have been identified as better catalysts for ethanol electro-oxidation. The third material is supposed to improve binary catalysts performance. This work presents a study of the ethanol electro-oxidation on carbon supported Pt-Sn and Pt-Sn-Ni catalysts. These catalysts were prepared by alcohol reduction. Nano-particles with diameters between 2.5-5.0 nm were obtained. The peak of (220) crystalline face centred cubic (fcc) Pt phase for PtSn and PtSnNi alloys was repositioned due to the presence of Sn and/or Ni in the alloy. Furthermore, the modification of Pt with Sn and SnNi improved ethanol and CO electro-oxidation.

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“…Crossover from the anode to the cathode in a direct liquid fuel cell (DLFC) has serious negative consequences for cell performance: it reduces the cell's coulombic and voltage efficiencies (Dillon, Srinivasan et al, 2004;Lopes, Antolini et al, 2008). In a DEFC, about 4 % of the ethanol is lost, which may be attributed to the crossover of ethanol from the anode to cathode (Zhu, Sun et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

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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Effect of alloying degree in PtSn catalyst on the catalytic behavior for ethanol electro-oxidation

Cited by 177 publications

References 29 publications

Mesoporous PtSnO2/C Catalyst with Enhanced Catalytic Activity for Ethanol Electro-oxidation

Mesoporous PtSnO2/C Catalyst with Enhanced Catalytic Activity for Ethanol Electro-oxidation

Electro-oxidation of Ethanol on Carbon Supported PtSn and PtSnNi Catalysts

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

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