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Kim, Kwang S.
Center for Superfunctional Materials (CSM)
Research Interests
  • Theoretical/experimental nanosciences, molecular electronics spectroscopy, energy materials

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Stable platinum nanoclusters on genomic DNA-graphene oxide with a high oxygen reduction reaction activity

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Title
Stable platinum nanoclusters on genomic DNA-graphene oxide with a high oxygen reduction reaction activity
Author
Tiwari, Jitendra N.Nath, KrishnaKumar, SusheelTiwari, Rajanish N.Kemp, K. ChristianLe, Nhien H.Youn, Duck HyunLee, Jae SungKim, Kwang S.
Issue Date
2013-07
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.4, pp.1 - 7
Abstract
Nanosize platinum clusters with small diameters of 2-4 nm are known to be excellent catalysts for the oxygen reduction reaction. The inherent catalytic activity of smaller platinum clusters has not yet been reported due to a lack of preparation methods to control their size (<2 nm). Here we report the synthesis of platinum clusters (diameter ≤1.4 nm) deposited on genomic double-stranded DNA-graphene oxide composites, and their high-performance electrocatalysis of the oxygen reduction reaction. The electrochemical behaviour, characterized by oxygen reduction reaction onset potential, half-wave potential, specific activity, mass activity, accelerated durability test (10,000 cycles) and cyclic voltammetry stability (10,000 cycles) is attributed to the strong interaction between the nanosize platinum clusters and the DNA-graphene oxide composite, which induces modulation in the electronic structure of the platinum clusters. Furthermore, we show that the platinum cluster/DNA-graphene oxide composite possesses notable environmental durability and stability, vital for high-performance fuel cells and batteries.
URI
https://scholarworks.unist.ac.kr/handle/201301/3928
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84881411868
DOI
10.1038/ncomms3221
ISSN
2041-1723
Appears in Collections:
CHM_Journal Papers
ECHE_Journal Papers
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