Microemulsion Synthesized Pt∕Ru∕Sn Nanoparticles on BDD for Alcohol Electro-oxidation

Siné, G.; Smida, D.; Limat, Mériadec; Fóti, György; Comninellis, Ch.

doi:10.1149/1.2400602

Cited by 56 publications

(34 citation statements)

References 33 publications

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“…The increase in Sn content clearly resulted in a serious Ru depletion in the catalyst compared to the nominal composition. Sine et al [33] observed a similar Ru depletion on the surface of a PtRuSn ternary catalyst based on an XPS study, which was explained as Ru being repelled from the catalyst surface by Sn. For the commercial catalyst, PtRu HISPEC5000, a good agreement is shown between the actual and nominal composition.…”

Section: Defc Single-cell Characterizationmentioning

confidence: 81%

“…9a and b showing polarization curves recorded after the durability test normalized to the MEA surface area and platinum loading, respectively. The maximum power density of commercial Pt 83 Sn 17 33 /C showed a maximum power density loss of 52, 64 and 67%, respectively. At this stage, it is difficult to draw meaningful conclusions around this behavior because more post-durability investigations are needed regarding the catalyst composition, reaction products analysis, MEA diagnostics and more.…”

Section: Defc Durability Testmentioning

confidence: 96%

“…33 /C. The polarization curves were repeated at least nine times for a given composition (three different electrodes prepared from three different catalyst batches).…”

Section: Ethanol Oxidation Activitymentioning

confidence: 99%

“…All polarization measurements were conducted in galvanostatic mode. cell performance compared to Pt 30 33 /C (1:1) is not only important in terms of maximum specific power density but also in terms of operation at higher current densities. This result clearly shows both the activating and stabilizing effect of Ir.…”

Section: Defc Testingmentioning

confidence: 99%

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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: Defc Single-cell Characterizationmentioning

confidence: 81%

Section: Defc Durability Testmentioning

confidence: 96%

“…33 /C. The polarization curves were repeated at least nine times for a given composition (three different electrodes prepared from three different catalyst batches).…”

Section: Ethanol Oxidation Activitymentioning

confidence: 99%

Section: Defc Testingmentioning

confidence: 99%

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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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“…(4)) [82]. Cathodic catalysts to be used in fuel cells are also reported to be synthesized via microemulsion route [83]. Yet, the microemulsion-synthesized nanocatalysts exhibit unsatisfactory long-term stability [84]:…”

Section: Electrocatalysismentioning

confidence: 99%

Microemulsion Route for the Synthesis of Nano-Structured Catalytic Materials

Hussain¹,

Batool²

2017

Properties and Uses of Microemulsions

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Owing to their unique properties, use of microemulsion-based synthetic techniques for the generation of shape-controlled nanocatalyst is an area of great current interest. Nanocatalysts of any specific shape, morphology, surface area, size, geometry, homogeneity and composition are widely being prepared using the soft techniques of microemulsion. Easy handling, inexpensive equipment and mild reaction conditions make microemulsion an attractive reaction medium. Herein, a nanosized precursor reactant can be incorporated, leading to the formulation of a highly monodispersed metal nanoagglomerate with controlled size, shape and composition. Several factors such as presence of electrolyte, molar ratio of water to surfactant, nature and concentration of surfactant and solvent, size of water droplets and concentration of reducing agents influence the size of the nanoparticles. The reverse micelle method can be used for the fabrication of several nanosized catalysts with a diverse variety of suitable materials including silica, alumina, metals (e.g. Au, Pd, Rh, Pt), metal oxides, etc. The morphology, size distribution and shape of the nanocatalysts make them useable for a wide range of applications, for example, fuel cells, electrocatalysis, photocatalysis, environmental protection, etc. The recovery of nanoparticles from the reaction mixture is a challenge for the researchers. This chapter discusses the preparation of nanoparticles using microemulsion techniques, widely being used for the synthesis of nanocatalysts from a wide range of materials.

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