Lattice strain mapping of platinum nanoparticles on carbon and SnO2 supports

Daio, Takeshi and Staykov, Aleksandar and Guo, Limin and Liu, Jianfeng and Tanaka, Masaki and Matthew Lyth, Stephen and Sasaki, Kazunari (2015) Lattice strain mapping of platinum nanoparticles on carbon and SnO2 supports. Scientific Reports, 5. pp. 1-10. 13126. ISSN 2045-2322 (https://doi.org/10.1038/srep13126)

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Abstract

It is extremely important to understand the properties of supported metal nanoparticles at the atomic scale. In particular, visualizing the interaction between nanoparticle and support, as well as the strain distribution within the particle is highly desirable. Lattice strain can affect catalytic activity, and therefore strain engineering via e.g. synthesis of core-shell nanoparticles or compositional segregation has been intensively studied. However, substrate-induced lattice strain has yet to be visualized directly. In this study, platinum nanoparticles decorated on graphitized carbon or tin oxide supports are investigated using spherical aberration-corrected scanning transmission electron microscopy (Cs-corrected STEM) coupled with geometric phase analysis (GPA). Local changes in lattice parameter are observed within the Pt nanoparticles and the strain distribution is mapped. This reveals that Pt nanoparticles on SnO 2 are more highly strained than on carbon, especially in the region of atomic steps in the SnO 2 lattice. These substrate-induced strain effects are also reproduced in density functional theory simulations, and related to catalytic oxygen reduction reaction activity. This study suggests that tailoring the catalytic activity of electrocatalyst nanoparticles via the strong metal-support interaction (SMSI) is possible. This technique also provides an experimental platform for improving our understanding of nanoparticles at the atomic scale.

  • Item type:Article
    ID code:85565
    Dates:
    Date
    Event
    18 August 2015
    Published
    20 July 2015
    Accepted
    2 October 2014
    Submitted
    Notes:Funding Information: This research is supported by the Japan Science and Technology Agency (JST) through its “Center of Innovation Science and Technology based Radical Innovation and Entrepreneurship Program (COI Program). The International Institute for Carbon-Neutral Energy Research (I2CNER) is supported by World Premier International Research Center Initiative (WPI), MEXT, Japan. The STEM used in this study was installed by the support from the Ministry of Economy, Trade and Industry (METI) Japan, to establish NEXT-FC. We thank Mr. Takuya Tsukatsune who prepared the Pt-decorated SnO2 catalyst sample. Financial support by the Grant-in-Aid for Scientific Research (No. 23226015), JSPS Japan, is gratefully acknowledged. Daio, T., Staykov, A., Guo, L. et al. Lattice Strain Mapping of Platinum Nanoparticles on Carbon and SnO2 Supports. Sci Rep 5, 13126 (2015). https://doi.org/10.1038/srep13126
    Subjects:Science > Chemistry
    Department:Faculty of Engineering > Chemical and Process Engineering
    Depositing user: Pure Administrator
    Date deposited:18 May 2023 13:23
    Last modified:09 Apr 2024 04:04
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/85565
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