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  • Formation of Branched Ruthenium Nanoparticles for Improved Electrocatalysis of Oxygen Evolution Reaction

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    Benedetti1076952-Accepted.pdf (1.434Mb)
    File version
    Accepted Manuscript (AM)
    Author(s)
    Poerwoprajitno, Agus R
    Gloag, Lucy
    Benedetti, Tania M
    Cheong, Soshan
    Watt, John
    Huber, Dale L
    Gooding, J Justin
    Tilley, Richard D
    Griffith University Author(s)
    Benedetti, Tania
    Year published
    2019
    Metadata
    Show full item record
    Abstract
    Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity and stability. Understanding how the crystallinity and surface facets of branched nanoparticles affect their catalytic performance is vital for further catalyst development. In this work, a synthesis is developed to form highly branched ruthenium (Ru) nanoparticles with control of crystallinity. It is shown that faceted Ru branched nanoparticles have improved stability and activity in the oxygen evolution reaction (OER) compared with polycrystalline Ru nanoparticles. This ...
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    Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity and stability. Understanding how the crystallinity and surface facets of branched nanoparticles affect their catalytic performance is vital for further catalyst development. In this work, a synthesis is developed to form highly branched ruthenium (Ru) nanoparticles with control of crystallinity. It is shown that faceted Ru branched nanoparticles have improved stability and activity in the oxygen evolution reaction (OER) compared with polycrystalline Ru nanoparticles. This work achieves a low 180 mV overpotential at 10 mA cm −2 for hours, demonstrating that record-high stability for Ru nanocrystals can be achieved while retaining high activity for OER. The superior electrocatalytic performance of faceted Ru branched nanoparticles is ascribed to the lower Ru dissolution rate under OER conditions due to low-index facets on the branch surfaces.
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    Journal Title
    Small
    Volume
    15
    Issue
    17
    DOI
    https://doi.org/10.1002/smll.201804577
    Copyright Statement
    © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Formation of Branched Ruthenium Nanoparticles for Improved Electrocatalysis of Oxygen Evolution Reaction, Small, 2019, 15 (17), pp. 1804577, which has been published in final form at https://doi.org/10.1002/smll.201804577. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
    Subject
    Nanotechnology
    Science & Technology
    Physical Sciences
    Technology
    Chemistry, Multidisciplinary
    Chemistry, Physical
    Publication URI
    http://hdl.handle.net/10072/412852
    Collection
    • Journal articles

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