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Synthesis and growth mechanism of carbon-supported nanoparticle catalysts by physical vapor deposition onto a liquid medium substrate

机译：物理气相沉积在液体介质基质上的碳载纳米催化剂的合成与生长机理

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摘要

Metal nanoparticles (NPs) have been extensively investigated owing to their unique properties attributing to their high surface/bulk ratio and finite number of atoms. However, the thermodynamic instability of NPs, which originates from their finite size, limits their practical applications. Hence, carbon-supported Pt NPs are synthesized onto carbon-containing liquid substrates via direct one-step sputtering. In order to successfully produce uniform Pt NPs via sputtering using various ionic liquids as non-volatile liquid substrates, special conditions are required, and the relationship between ionic liquids and particle surfaces should be investigated. It has been reported that anions and carbon supports of ionic liquids significantly affect the dispersion and synthesis of Pt NPs. In this study, we proposed a mechanism underlying the chemical bonding between anions and carbon supports and verified it using X-ray photoelectron spectroscopy and infrared spectroscopy.
机译：金属纳米颗粒（NPs）由于其独特的特性而被广泛研究，这归因于其高的表面/本体比和有限的原子数。但是，NP的热力学不稳定性源于其有限的尺寸，限制了其实际应用。因此，通过直接一步溅射将碳负载的Pt NPs合成到含碳液体基板上。为了通过使用各种离子液体作为非挥发性液体基质通过溅射成功生产出均匀的Pt NP，需要特殊的条件，并且应该研究离子液体与颗粒表面之间的关系。据报道，离子液体的阴离子和碳载体显着影响Pt NP的分散和合成。在这项研究中，我们提出了一种阴离子与碳载体之间化学键合的机理，并使用X射线光电子能谱和红外光谱对其进行了验证。

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  • 来源
    《Applied Surface Science》 |2019年第31期|1083-1087|共5页
  • 作者

    Cha In Young; Kim Hyung Tae; Ahn Minjeh; Jang Jong Hyun; Kim Young Gyu; Sung Yung-Eun; Yoo Sung Jong;

  • 作者单位

    Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 02792, South Korea;

    Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 08826, South Korea;

    Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 02792, South Korea;

    Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 02792, South Korea|Univ Sci & Technol, KIST Sch, Div Energy & Environm Technol, Seoul 02792, South Korea;

    Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 08826, South Korea;

    Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 08826, South Korea|Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 08826, South Korea;

    Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 02792, South Korea|Univ Sci & Technol, KIST Sch, Div Energy & Environm Technol, Seoul 02792, South Korea|Kyung Hee Univ, KHU KIST Dept Converging Sci & Technol, Seoul 02447, South Korea;

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  • 正文语种 eng
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  • 关键词

    Carbon supported metal nanoparticles; Sputtering; Pt catalysts; Ionic liquids; Catalysts synthesis;

    机译：碳载金属纳米粒子;溅射;Pt催化剂;离子液体;催化剂合成;

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