Purification of catalytically produced carbon nanotubes for use as support for fuel cell cathode Pt catalyst

Rocco, Ana Maria; Silva, Cristiane A. da; Macêdo, Maria Iaponeide Fernandes; Maestro, Luis Fernando; Herbst, Marcelo H.; Solórzano, Guillermo; Xavier, Altair L.

doi:10.1007/s10853-007-1779-3

Cited by 7 publications

(1 citation statement)

References 35 publications

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“…Besides electrospraying technique, graphene is employed as the Pt support to form a novel electrode structure in this study. Although commercial carbon blacks have been regarded as the most extensively used support for Pt, other supports including carbon nanotubes [14][15][16] and their composites with conducting polymers [17], carbon xerogel and carbon aerogel [18], carbon nanofibers [19], and graphene [20][21][22] have been utilized previously. Unsupported Pt nanoparticles were also employed as the catalysts for fuel cells as well [8,22].…”

Section: Introductionmentioning

confidence: 99%

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

et al. 2016

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Here, we report a novel electrode structure with graphene and graphene-carbon black hybrids by electrospraying for polymer electrolyte membrane fuel cells. After syntheses of platinum (Pt)/partially reduced graphene oxide (rGO) and Pt/r-GO/carbon black (CB) hybrid electrocatalysts, suspensions of synthesized electrocatalyst inks were prepared with Nafion Ò ionomer and poly(vinylidene fluoride-cohexafluoropropylene) and electrosprayed over carbon paper to form electrodes. Electrosprayed catalyst layer exhibited uniform and small size Pt distribution. As the graphene content increases micrometer-sized droplet, pore formation and surface roughness of the electrode increase. Thus, an open porous electrode structure which is favorable for mass transport is achieved by electrospraying. The maximum power densities, 324 mW cm -2 for Pt/rGO and 441 mW cm -2 for Pt/rGO/CB electrosprayed electrodes, were achieved at a relatively low catalyst loading.

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Section: Introductionmentioning

confidence: 99%

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

et al. 2016

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Encapsulation of palladium nanoparticles by multiwall carbon nanotubes‐graft‐poly(citric acid) hybrid materials

Adeli

Mehdipour

Bavadi

2010

J of Applied Polymer Sci

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Citric acid was polymerized onto the surface of functionalized multiwall carbon nanotubes (MWCNT-COOH) and MWCNT-graft-poly(citric acid) (MWCNTg-PCA) hybrid materials were obtained. Due to the grafted poly(citric acid) branches, MWCNT-g-PCA hybrid materials not only were soluble in water but also were able to trap water soluble metal ions. Reduction of trapped metal ions in the polymeric shell of MWCNT-g-PCA hybrid materials by reducing agents such as sodium borohydride led to encapsulated metal nanoparticles on the surface of MWCNT. Herein palladium nanoparticles were encapsulated and transported by MWCNT-g-PCA hybrid materials (MWCNT-g-PCA-EPN) and their application as nanocatalyst toward Heck reaction in different conditions was investigated. The catalytic activity of palladium ions supported by MWCNT-g-PCA hybrid materials (MWCNT-g-PCAPdCl 2 ) toward Heck reactions is much more than for MWCNT-g-PCA-EPN. Structure, characteristics and catalytic activity of synthesized systems was investigated using spectroscopy and microscopy methods.

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Growth and characterization of bamboo-like multiwalled carbon nanotubes over Cu/Al2O3 catalyst

et al. 2009

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Purification of catalytically produced carbon nanotubes for use as support for fuel cell cathode Pt catalyst

Cited by 7 publications

References 35 publications

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

Encapsulation of palladium nanoparticles by multiwall carbon nanotubes‐graft‐poly(citric acid) hybrid materials

Growth and characterization of bamboo-like multiwalled carbon nanotubes over Cu/Al2O3 catalyst

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