Pt/carbon nanofibers electrocatalysts for fuel cells

Zaragoza-Martín, F.; Sopeña-Escario, D.; Morallón, Emilia; Lecea, C. Salinas-Martı́nez de

doi:10.1016/j.jpowsour.2007.06.078

Cited by 71 publications

(40 citation statements)

References 21 publications

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“…Next, poly(vinylpyrrolidone), PVP, (Aldrich) dispersed in water is added to the ethylene glycol dispersion. 14 13,15 To evaluate the activity of the supported catalysts in relation to the methanol electrooxidation, CV experiments at 50 mV·s -1 and chronoamperometric experiments were performed with a EG&G Potentiostat Galvanostat Mod. 263A.…”

Section: Preparation Of Pt/gcns Electrocatalysts and Electrochemical mentioning

confidence: 99%

Synthesis of Graphitic Carbon Nanostructures from Sawdust and Their Application as Electrocatalyst Supports

et al. 2007

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We present a novel and facile synthetic method for fabricating graphitic carbon nanostructures (GCNs) from sawdust. This method is based on the use of catalysts (Fe or Ni) that allows the direct conversion of sawdust into highly graphitized carbon material. The following procedure was used to obtain these graphitic nanoparticles: a) impregnation of the sawdust particles with iron or nickel salts, b) carbonization of the impregnated material at a temperature of 900 or 1000ºC, c) selective removal of the non-graphitized carbon (amorphous carbon) by an oxidant (KMnO 4 ). The resulting carbon is made up of nanosized graphitic structures (i.e. nanocapsules, nanocoils, nanoribbons), which have a high crystallinity, as evidenced by TEM/SAED, XRD and Raman analysis. These GCNs were used as supports for platinum nanoparticles. Such prepared electrocatalysts show an electrocatalytical surface area close to 90 m 2 .g -1 Pt and they present very promising results for methanol electrooxidation.

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Section: Preparation Of Pt/gcns Electrocatalysts and Electrochemical mentioning

confidence: 99%

Synthesis of Graphitic Carbon Nanostructures from Sawdust and Their Application as Electrocatalyst Supports

et al. 2007

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“…28 We recently obtained a similar result for a catalyst made up of Pt nanoparticles deposited on nanostructured carbon (GCNs and carbon nanofibers). 13,29 The electrocatalytic activity of the Pt/GCNs towards methanol oxidation was investigated by cyclic voltammetry and chronoamperometric experiments in a 0.1 M CH 3 OH + Pt(0)/Pt(0 + II) (%) Pt (0) Pt(II) 0.5 M H 2 SO 4 solution. The resulting voltammograms obtained during the 14th cycle for the Pt/GGCo-900, Pt/GGCo-1000, Pt/GGFe-900 and Pt/Vulcan electrocatalysts are represented in Fig.…”

Section: Structural Properties and Electrocatalytic Activity Of Pt/gcnsmentioning

confidence: 99%

Solid-phase synthesis of graphitic carbon nanostructures from iron and cobalt gluconates and their utilization as electrocatalyst supports

Sevilla

Lecea

Valdés-Solı́s

et al. 2008

Phys. Chem. Chem. Phys.

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We present a novel and facile synthesis methodology for obtaining graphitic carbon structures from Fe(II) and Co(II) gluconates. The formation of graphitic carbon can be carried out in only one step by means of heat treatment of these organic salts at a temperature of 900 1C or 1000 1C under inert atmosphere. This process consists of the following steps: (a) pyrolysis of the organic gluconate and its transformation to amorphous carbon, (b)

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“…Carbon nanofibers (CNFs) are currently investigated for a wide range of energy related applications such as electrodes in fuel cells [1][2][3], batteries [3,4], and supercapacitors [3,[5][6][7][8], as catalyst support [9,10], or sensors [11,12]. Another promising application for CNFs is hydrogen storage [13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths

Kunowsky

Marco-Lozar

Ōya

et al. 2012

Carbon

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Amorphous carbon nanofibers (CNFs), produced by the polymer blend technique, are activated by CO 2 (ACNFs). Monoliths are synthesized from the precursor and from some ACNFs. Morphology and textural properties of these materials are studied. When compared with other activating agents (steam and alkaline hydroxides), CO 2 activation renders suitable yields and, contrarily to most other precursors, turns out to be advantageous for developing and controlling their narrow microporosity (< 0.7 nm), V DR (CO 2 ). The obtained ACNFs have a high compressibility and, consequently, a high packing density under mechanical pressure which can also be maintained upon monolith synthesis. H 2 adsorption is measured at two different conditions (77 K / 0.11 MPa, and 298 K / 20 MPa) and compared with other activated carbons. Under both conditions, H 2 uptake depends on the narrow microporosity of the prepared ACNFs. Interestingly, at room temperature these ACNFs perform better than other activated carbons, despite their lower porosity developments. At 298 K they reach a H 2 adsorption capacity as high as 1.3 wt.%, and a remarkable value of 1 wt.% in its mechanically resistant monolith form.

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Pt/carbon nanofibers electrocatalysts for fuel cells

Abstract: Different Pt-based electrocatalysts supported on carbon nanofibers and carbon black (Vulcan XC-72R) have been prepared using a polymer-mediated synthesis. The

Cited by 71 publications

References 21 publications

Synthesis of Graphitic Carbon Nanostructures from Sawdust and Their Application as Electrocatalyst Supports

Synthesis of Graphitic Carbon Nanostructures from Sawdust and Their Application as Electrocatalyst Supports

Solid-phase synthesis of graphitic carbon nanostructures from iron and cobalt gluconates and their utilization as electrocatalyst supports

Hydrogen storage in CO2-activated amorphous nanofibers and their monoliths

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