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Controlling Size, Amount, and Crystalline Structure of Nanoparticles Deposited on Graphenes for Highly Efficient Energy Conversion and Storage

Authors

  • Bong Gill Choi,

    1. Department of Chemical & Biomolecular Engineering (BK21), Korea Advanced Institute of Science and Technology, Daejeon 305-701 (Republic of Korea)
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  • Prof. Dr. Ho Seok Park

    Corresponding author
    1. Department of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin-si 446-701 (Republic of Korea)
    • Department of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin-si 446-701 (Republic of Korea)
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Abstract

A facilitated electrochemical reaction at the surface of electrodes is crucial for highly efficient energy conversion and storage. Herein, various nanoparticles (NPs) including Au, Pt, Pd, Ru, and RuO2, were synthesized in situ and directly deposited on the ionic liquid (IL)-functionalized reduced graphene oxides (RGOs) in a controlled manner. The size, amount, and crystalline structures of discrete NPs were readily controlled, giving rise to enhanced methanol oxidation and pseudocapacitance. The well-defined nanostructure of decorated NPs and the favorable interaction between ILs and RGOs (or NPs) facilitated the electrochemical reaction, where NPs acted as electrocatalysts for energy conversion and played the role of redox-active electrodes for energy storage.

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