Ethanol electro-oxidation on carbon-supported Pt3Sn/C, Pt3Cu/C and PtSnCu/C catalysts: CV and in situ FTIR study

Magalhães, Monah M.; Gomes, Janaina F.; Tremiliosi‐Filho, Germano; Figueiredo, Patrick B. S. de; Lima, Roberto Alves de; Colmati, Flávio

doi:10.1007/s10800-020-01491-4

Cited by 14 publications

(6 citation statements)

References 52 publications

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“…45 There is a possibility that isolated Pt particles would also have formed but their diffraction peaks would overlap with the peaks of Pt 3 Sn. 46 The diffraction peaks at 39.8 and 67.5° are assigned to cubic Pt (111) and Pt (220), respectively. Further characterization of the as-synthesized PtSn/VC(3) by XPS is shown Fig.…”

Section: Resultsmentioning

confidence: 99%

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Platinum–tin as a superior catalyst for proton exchange membrane fuel cells

2023

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of the Platinum-tin Alloysmentioning

confidence: 99%

Platinum–tin as a superior catalyst for proton exchange membrane fuel cells

2023

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“…Recent studies show that Pt 3 Cu can adopt different geometries as a nanocatalyst, such as an octahedron [ 13 ], twinned icosahedron [ 13 ], dendritic pyramid [ 14 ], wires [ 15 ], nanoframes [ 16 ], among others. The vast array of geometries obtained with this special alloy has been used extensively as catalysts for different reactions, such as the oxygen reduction reaction (ORR) [ 13 , 16 , 17 ], the methanol oxidation reaction [ 18 ], and the ethanol oxidation reaction [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Graphene Supported Pt3Cu Nanoparticles—From Theory towards an Effective Molecular Oxygen Reduction Reaction Catalyst

et al. 2023

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In this work, recent research progresses in the formation of Pt3Cu nanoparticles onto the surface of graphene are described, and the obtained results are contrasted with previously published theoretical studies. To form these nanoparticles, tetrabutylammonium hexachloroplatinate, and copper acetylacetonate are used as platinum and copper precursors, respectively. Oleylamine is used as a reductor and a solvent. The obtained catalyst is characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy dispersive spectroscopy X-ray (EDS). To assess the catalytic activity, the graphene-supported Pt3Cu material is tested with cyclic voltammetry, “CO stripping”, and oxygen reduction reaction potentiodynamic curves to find the nature and the intrinsic electrochemical activity of the material. It can be observed that the tetrabutylammonium cation plays a critical role in anchoring and supporting nanoparticles over graphene, from which a broad discussion about the true nature of the anchoring mechanism was derived. The growth mechanism of the nanoparticles on the surface of graphene was observed, supporting the conducted theoretical models. With this study, a reliable, versatile, and efficient synthesis of nanocatalysts is presented, demonstrating the potentiality of Pt3Cu/graphene as an effective cathode catalyst. This study demonstrates the importance of reliable ab inito theoretical results as a useful source of information for the synthesis of the Pt3Cu alloy system.

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“…Currently, electrocatalysts are the most critical factors for developing direct ethanol fuel cells (DEFCs) [5][6][7][8]. Platinum (Pt) and its alloys are known as the best anode materials for low temperature fuel cells such as DAFCs [1][2][3][4][5][6][8][9][10][11][12]. However, the low activity, high cost, and poisoning of Pt by the reaction intermediates of ethanol electro-oxidation are the most signi cant barriers to its use in DEFCs [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

Abdolmaleki¹,

Hosseini

Allahgholipour³

et al. 2023

J Appl Electrochem

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In this work, to prepare nanostructured and porous Fe/Pd-Fe bimetallic catalysts, the iron coating is applied rstly onto the copper substrate by the electrochemical deposition method. Subsequently, iron-zinc alloy coating is deposited on the underlayer iron.Eventually, by immersing this alloy coating in an alkaline solution containing palladium ions, the palladium will replace the zinc, resulting in porous Fe/Pd-Fe catalysts.The X-ray diffraction (XRD) technique was used for the characterization of the physical properties of the as-prepared electrocatalysts. Their electrocatalytic activity was studied by electrochemical methods such as cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The XRD results showed that the zinc element was the main component of the Fe/Zn-Fe alloy and was replaced by palladium as a result of leaching-galvanic replacement. The electrochemical investigations showed that a new porous Fe/Pd-Fe bimetallic catalyst had higher electro-catalytic activity and stability than pure Pd and Fe electrodes for ethanol electro-oxidation in alkaline media. The superiority of the Fe/Pd-Fe catalyst is related to the high surface area and a synergistic effect between Fe and Pd in Fe/Pd-Fe catalysts. Therefore, the nanostructured Fe/Pd-Fe catalysts can be proposed as potential anode materials for alkaline ethanol fuel cells.

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Ethanol electro-oxidation on carbon-supported Pt3Sn/C, Pt3Cu/C and PtSnCu/C catalysts: CV and in situ FTIR study

Cited by 14 publications

References 52 publications

Platinum–tin as a superior catalyst for proton exchange membrane fuel cells

Platinum–tin as a superior catalyst for proton exchange membrane fuel cells

One-Pot Graphene Supported Pt3Cu Nanoparticles—From Theory towards an Effective Molecular Oxygen Reduction Reaction Catalyst

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

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