Ultralow Loading Pt Nanocatalysts Prepared by Atomic Layer Deposition on Carbon Aerogels

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Abstract

Using atomic layer deposition (ALD), we show that Pt nanoparticles can be deposited on the inner surfaces of carbon aerogels (CA). The resultant Pt-loaded materials exhibit high catalytic activity for the oxidation of CO even at loading levels as low as 0.05 mg Pt/cm². We observe a conversion efficiency of nearly 100% in the 150−250 °C temperatures range, and the total conversion rate seems to be limited only by the thermal stability of the CA support in ambient oxygen. The ALD approach described here is universal in nature, and can be applied to the design of new catalytic materials for a variety of applications, including fuel cells, hydrogen storage, pollution control, green chemistry, and liquid fuel production.

Citing Articles

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This article has been cited by 12 ACS Journal articles (5 most recent appear below).

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  Microstructure-Dependent Nucleation in Atomic Layer Deposition of Pt on TiO₂

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  Chemistry of Materials2012 24 (2), 279-286

  • Microstructure-Dependent Nucleation in Atomic Layer Deposition of Pt on TiO₂

    Han-Bo-Ram Lee and Stacey F. Bent
    Chemistry of Materials2012 24 (2), 279-286

    The effects of TiO2 microstructure on Pt nucleation and on formation of continuous ultrathin Pt films by atomic layer deposition (ALD) were investigated. Pt was deposited by a metalorganic Pt precursor ((methylcyclopentadienyl)trimethylplatinum) and air ...

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• 

  Subnanometer Palladium Particles Synthesized by Atomic Layer Deposition

  Hao Feng, Joseph A. Libera, Peter C. Stair, Jeffrey T. Miller, and Jeffrey W. Elam
  ACS Catalysis2011 Article ASAP

  • Subnanometer Palladium Particles Synthesized by Atomic Layer Deposition

    Hao Feng, Joseph A. Libera, Peter C. Stair, Jeffrey T. Miller, and Jeffrey W. Elam
    ACS Catalysis2011 Article ASAP

    Monodispersed palladium nanoparticle catalysts were synthesized by atomic layer deposition (ALD) using alternating exposures of Pd hexafluoroacetylacetonate (Pd(hfac)2) and formalin on an alumina support. The size of the ALD Pd particles could be tuned by ...

    Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
• 

  Atomic Layer Deposition of Pt on Tungsten Monocarbide (WC) for the Oxygen Reduction Reaction

  Irene J. Hsu, Danielle A. Hansgen, Brian E. McCandless, Brian G. Willis, and Jingguang G. Chen
  The Journal of Physical Chemistry C2011 115 (9), 3709-3715

  • Atomic Layer Deposition of Pt on Tungsten Monocarbide (WC) for the Oxygen Reduction Reaction

    Irene J. Hsu, Danielle A. Hansgen, Brian E. McCandless, Brian G. Willis, and Jingguang G. Chen
    The Journal of Physical Chemistry C2011 115 (9), 3709-3715

    Atomic layer deposition (ALD) was utilized as a synthesis method to deposit monolayers of Pt onto WC substrates for applications as oxygen reduction reaction electrocatalysts. Samples utilizing various Pt ALD cycles were characterized using surface ...

    Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
• 

  Nano/Subnanometer Pd Nanoparticles on Oxide Supports Synthesized by AB-type and Low-Temperature ABC-type Atomic Layer Deposition: Growth and Morphology

  Junling Lu and Peter C. Stair
  Langmuir2010 26 (21), 16486-16495

  • Nano/Subnanometer Pd Nanoparticles on Oxide Supports Synthesized by AB-type and Low-Temperature ABC-type Atomic Layer Deposition: Growth and Morphology

    Junling Lu and Peter C. Stair
    Langmuir2010 26 (21), 16486-16495

    The synthesis of uniformly dispersed nano/subnanometer Pd nanoparticles on oxide supports with atomic layer deposition (ALD) has been studied in terms of growth and morphology. In situ quartz crystal microbalance (QCM) measurements showed that AB-type Pd ...

    Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
• 

  Strain-Enhanced Stabilization and Catalytic Activity of Metal Nanoclusters on Graphene

  Miao Zhou, Aihua Zhang, Zhenxiang Dai, Yuan Ping Feng, and Chun Zhang
  The Journal of Physical Chemistry C2010 114 (39), 16541-16546

  • Strain-Enhanced Stabilization and Catalytic Activity of Metal Nanoclusters on Graphene

    Miao Zhou, Aihua Zhang, Zhenxiang Dai, Yuan Ping Feng, and Chun Zhang
    The Journal of Physical Chemistry C2010 114 (39), 16541-16546

    We report a first-principles investigation aiming at controlling the stabilization and catalytic activity of metal nanoclusters supported on graphene via tuning the mechanical strain in graphene. We show that a relatively modest tensile strain (10%) ...

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