Synthesis and characterization of carbon nanotubes supported platinum nanocatalyst for proton exchange membrane fuel cells

Lin, Jiewei; Kamavaram, Venkat; Kannan, Arunachala Mada

doi:10.1016/j.jpowsour.2009.07.055

Cited by 63 publications

(16 citation statements)

References 25 publications

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“…Aqueous sodium formate (HCOONa) has previously been used in the literature as a more mild, yet effective reducing agent [25]. Previous studies in our lab have also successfully used sodium formate as a reducing agent [26].…”

Section: Isrn Nanotechnologymentioning

confidence: 99%

Study of Carbon Nanotube-Supported Platinum Nanocatalyst Fabricated with Sodium Formate Reducing Agent in Ethylene Glycol Suspension

Mason

Kannan

2011

ISRN Nanotechnology

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A simple method to prepare a durable, low platinum-loading catalyst layer for the cathode in a proton exchange membrane fuel cell is tested and described. Multiwalled carbon nanotubes (MWCNTs) are functionalized with citric acid and then suspended in ethylene glycol. Here, platinum nanoparticles (~4 nm) are loaded onto the surface of the MWCNTs after hexachloroplatinic acid is reduced by aqueous sodium formate. A peak performance of 813 mW⋅cm−2 was achieved with a total membrane electrode assembly (MEA) platinum catalyst loading of 0.2 mg⋅cm−2 (0.1 mg⋅cm−2 anode/0.1 mg⋅cm−2 cathode), in H2/O2 (ambient pressure), at 80°C, with a Nafion 212 membrane. Peak power density only decreased by 23% after 1500 potentials cycles (ranged from 0.1 to 1.2 V, and vice versa, with a 50 mV/s scan rate, flowing H2/N2 at 80°C). Transmission electron microscopy (TEM) images show the morphology and distribution of the platinum nanoparticles loaded onto the surface of the MWCNTs.

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Section: Isrn Nanotechnologymentioning

confidence: 99%

Study of Carbon Nanotube-Supported Platinum Nanocatalyst Fabricated with Sodium Formate Reducing Agent in Ethylene Glycol Suspension

Mason

Kannan

2011

ISRN Nanotechnology

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“…CNTs are often activated by harsh oxidative processes, such as refluxing in concentrated acids to generate oxygen functional groups. [18] The process introduces a large amount of defects, reduces electrical conductivity and worsens corrosion resistance for CNTs. Recently, CNTs have been functionalized with surfactants and polymers to preserve the structural and electronic properties for a support to deposit metal nanocrystals; this has resulted in improved catalytic activity, but great challenges still remain.…”

Section: Introductionmentioning

confidence: 99%

DNA‐Directed Growth of Pd Nanocrystals on Carbon Nanotubes towards Efficient Oxygen Reduction Reactions

Zhang

Guo

Cui

et al. 2012

Chemistry A European J

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Unique DNA-promoted Pd nanocrystals on carbon nanotubes (Pd/DNA-CNTs) are synthesized for the first time, in which through its regularly arranged PO(4)(3-) groups on the sugar-phosphate backbone, DNA directs the growth of ultrasmall Pd nanocrytals with an average size of 3.4 nm uniformly distributed on CNTs. The Pd/DNA-CNT catalyst shows much more efficient electrocatalytic activity towards oxygen reduction reaction (ORR) with a much more positive onset potential, higher catalytic current density and better stability than other Pd-based catalysts including Pd nanocrystals on carbon nanotubes (Pd/CNTs) without the use of DNA and commercial Pd/C catalyst. In addition, the Pd/DNA-CNTs catalyst provides high methanol tolerance. The high electrocatalytic performance is mainly contributed by the ultrasmall Pd nanocrystal particles grown directed by DNA to enhance the mass transport rate and to improve the utilization of the Pd catalyst. This work may demonstrate a universal approach to fabricate other superior metal nanocrystal catalysts with DNA promotion for broad applications in energy systems and sensing devices.

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“…The synthesis methods reported in the literature for Pt/CNTs are wet chemical method [16,17], electroless plating [18], electrodeposition [19], selfassembly [20] and supercitrical fluid [21]. However, homogenous deposition of Pt nanoparticles on the inert surface of CNTs is still a challenge in current technology [22].…”

Section: Pt/mwcnts Synthesis Methodsmentioning

confidence: 99%

Comparison of Pt/MWCNTs nanocatalysts synthesis processes for proton exchange membrane fuel cells

Liu

Villacorta

Adame

et al. 2011

International Journal of Hydrogen Energy

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Synthesis and characterization of carbon nanotubes supported platinum nanocatalyst for proton exchange membrane fuel cells

Cited by 63 publications

References 25 publications

Study of Carbon Nanotube-Supported Platinum Nanocatalyst Fabricated with Sodium Formate Reducing Agent in Ethylene Glycol Suspension

Study of Carbon Nanotube-Supported Platinum Nanocatalyst Fabricated with Sodium Formate Reducing Agent in Ethylene Glycol Suspension

DNA‐Directed Growth of Pd Nanocrystals on Carbon Nanotubes towards Efficient Oxygen Reduction Reactions

Comparison of Pt/MWCNTs nanocatalysts synthesis processes for proton exchange membrane fuel cells

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