Electrocatalysts for ethanol and ethylene glycol oxidation reactions. Part I: Effects of the polyol synthesis conditions on the characteristics and catalytic activity of Pt–Sn/C anodes

González-Quijano, D.; Pech-Rodríguez, W. J.; Escalante-Garcı́a, J.I.; Vargas‐Gutiérrez, G.; Rodríguez-Varela, F.J.

doi:10.1016/j.ijhydene.2014.04.125

Cited by 39 publications

(31 citation statements)

References 24 publications

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“…Susut and Tong demonstrated that the particle shape could be controlled in the presence of AgNO3 with different concentrations in the reaction mixture before the addition of PVP (poly-vinylpyrrolidone) and Pt precursor solutions [81]. Gonzalez-Quinjano et al [82] also reported the synthesis of Pt-Sn/C electrocatalysts by using ethylene glycol containing ethanol and water in different ratios. They noticed that the chemical composition, lattice parameter, and degree of alloying depended on the solution ratio between ethylene glycol, ethanol, and water.…”

Section: Methodsmentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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Abstract:The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpected fundamental modifications compared to the corresponding bulk state. To address these fundamental issues, various synthetic routes have been developed in order to provide more versatile carbon-supported low platinum catalysts. Consequently, the approach of using nanocatalysts may overcome the drawbacks encountered in massive materials for energy conversion. This review paper aims at summarizing the recent important advances in carbon-supported metal nanoparticles preparation from colloidal methods (microemulsion, polyol, impregnation, Bromide Anion Exchange…) as cathode material in low temperature FCs. Special attention is devoted to the correlation of the structure of the nanoparticles and their catalytic properties. The influence of the synthesis method on the electrochemical properties of the resulting catalysts is also discussed. Emphasis on analyzing data from theoretical models to address the intrinsic and specific electrocatalytic properties, depending on the synthetic method, is incorporated throughout. The synthesis process-nanomaterials structure-catalytic activity relationships highlighted herein, provide ample new rational, convenient and OPEN ACCESSCatalysts 2015, 5 311 straightforward strategies and guidelines toward more effective nanomaterials design for energy conversion.

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Section: Methodsmentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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“…In a previous communication, we reported the first part of the study regarding the effects of the polyol synthesis conditions on the properties and electrochemical behavior of PteSn/C alloys [9]. The results have shown that the EG:EtOH:H 2 O ratios have an important effect on the physicochemical characteristics and thus on the electrocatalytic activity of the alloys for the electro-oxidation of ethanol and ethylene glycol.…”

Section: Introductionmentioning

confidence: 94%

“…For that purpose, a methodology was used varying the EG:EtOH:H 2 O volume ratio (v/o) in the dispersing solution. The temperature was kept at 130 C. The experiments also included a set of syntheses without H 2 O, resulting in 12 PteRu/C catalysts, as in our previous report [9].…”

Section: Synthesis Of Ptesn/c Catalystsmentioning

confidence: 99%

“…The results have shown that the EG:EtOH:H 2 O ratios have an important effect on the physicochemical characteristics and thus on the electrocatalytic activity of the alloys for the electro-oxidation of ethanol and ethylene glycol. As a result, the PteSn/C alloys synthesized in the absence of H 2 O showed smaller particle size, higher degree of alloying and larger lattice parameters, delivering higher performance as anodes for the EOR and the EGOR in acid electrolyte compared to other PteSn/C and Pt/C catalysts [9].…”

Section: Introductionmentioning

confidence: 96%

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Electrocatalysts for ethanol and ethylene glycol oxidation reactions. Part II: Effects of the polyol synthesis conditions on the characteristics and catalytic activity of Pt–Ru/C anodes

González-Quijano

Pech-Rodríguez

González-Quijano³

et al. 2015

International Journal of Hydrogen Energy

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“…Aiming to solve this problem researchers are developing new bi and/or trimetallic catalysts for the complete oxidation of ethylene glycol [3,8]. The alloys are seen as more tolerant to the CO poisoning, since the presence of a second or third metal as co-catalyst modifies the atomic structure and the valence of the d orbitals of the Pt [21,22,23]. These co-catalysts weaken the adsorption energy of CO and facilitate the cleavage of the C-C bond of the adsorbed alcohols [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Ethylene glycol oxidation on ternary PtRhNi/C electrocatalyst with different metal compositions

Marinho¹,

Pocrifka

Passos

2017

Matéria (Rio J.)

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Direct Alcohol Fuel Cells (DAFC's) are an alternative to fuel cell systems and when is used alkaline medium this has an increase performance. The alkaline direct alcohol fuel cells (ADAFC's) have some advantages such as low-emission, high energy efficiency, improved oxidation kinetics, low crossover and in addition there is a broad range of materials that can be used as catalysts. The ethylene glycol (EG) has received attention in recent decades as an alternative fuel for ADAFC, but like others alcohols must be completed oxidized to generate full power energy. In this study we analyzed ternary PtRhNi/C electrocatalysts with different compositions, synthesized by alcohol reduction method, and compared to Pt/C ETEK. The active area, catalytic activity and stability of catalysts for ethylene glycol oxidation in alkaline medium were studied by cyclic voltammetry, CO stripping voltammetry and chronoamperometry tests. XRD technique was applied to physical characterization and it was observed the formation of alloy. The average crystallite size was calculated from the Scherrer equation. The Pt 92 Rh 7 Ni 1 /C electrocatalyst shows a larger electrochemically active area and consequently higher catalytic activity for EG oxidation. This response was attributed to improvement in the synergistic effect provided by the reduction of the amount of Rh and Ni in the ternary alloy when compared to Pt 80 Rh 15 Ni 5 /C and Pt/C ETEK electrocatalysts. However, Pt 80 Rh 15 Ni 5 /C electrocatalyst showed greater tolerance to poisoning by intermediate species due to the presence of Rh in greater quantity, leading to a formation of adsorbed OH species in potentials smaller than those for platinum.

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Electrocatalysts for ethanol and ethylene glycol oxidation reactions. Part I: Effects of the polyol synthesis conditions on the characteristics and catalytic activity of Pt–Sn/C anodes

Cited by 39 publications

References 24 publications

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Electrocatalysts for ethanol and ethylene glycol oxidation reactions. Part II: Effects of the polyol synthesis conditions on the characteristics and catalytic activity of Pt–Ru/C anodes

Ethylene glycol oxidation on ternary PtRhNi/C electrocatalyst with different metal compositions

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