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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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Interconnected Pt-nanodendrite/DNA/reduced-graphene-oxide hybrid showing remarkable oxygen reduction activity and stability

Cited 2 times inthomson ciCited 1 times inthomson ci
Title
Interconnected Pt-nanodendrite/DNA/reduced-graphene-oxide hybrid showing remarkable oxygen reduction activity and stability
Author
Tiwari, Jitendra N.Kemp, Kingsley ChristianNath, KrishnaTiwari, Rajanish N.Nam, Hong-GilKim, Kwang S.
Keywords
catalytic activity; DNA; fuel cells; oxygen reduction reaction; Pt nanodendrites
Issue Date
201310
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.7, no.10, pp.9223 - 9231
Abstract
Controlling the morphology and size of platinum nanodendrites (PtDs) is a key factor in improving their catalytic activity and stability. Here, we report the synthesis of PtDs on genomic-double-stranded-DNA/reduced-grapheneoxide (gdsDNA/rGO) by the NaBH4 reduction of H2PtCl6 in the presence of plant gdsDNA. Compared to industrially adopted catalysts (i.e., state-of-the-art Pt/C catalyst, Pt/rGO, Pt3Co, etc.), the as-synthesized PtDs/gdsDNA/rGO hybrid displays very high oxygen reduction reaction (ORR) catalytic activities (much higher than the 2015 U.S. Department of Energy (DOE) target values), which are the rate-determining steps in electrochemical energy devices, in terms of onset-potential, halfwave potential, specific-activity, mass-activity, stability, and durability. Moreover, the hybrid exhibits a highly stable mass activity for the ORR over a wide pH range of 113. These exceptional properties would make the hybrid applicable in nextgeneration electrochemical energy devices.
URI
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DOI
http://dx.doi.org/10.1021/nn4038404
ISSN
1936-0851
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