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Interconnected Pt-Nanodendrite/DNA/Reduced-Graphene-Oxide Hybrid Showing Remarkable Oxygen Reduction Activity and Stability

Title
Interconnected Pt-Nanodendrite/DNA/Reduced-Graphene-Oxide Hybrid Showing Remarkable Oxygen Reduction Activity and Stability
Author(s)
Tiwari, Jitendra N.Kemp, Kingsley ChristianNath, KrishnaTiwari, Rajanish N.Nam, Hong-GilKim, Kwang S.
Issued Date
2013-10
Citation
ACS Nano, v.7, no.10, pp.9223 - 9231
Type
Article
Author Keywords
Pt nanodendritesDNAfuel cellsoxygen reduction reactioncatalytic activity
Keywords
METHANOL FUEL-CELLSORDERED SILICON NANOCONESPLATINUM NANOPARTICLESELECTROOXIDATION ACTIVITYSTABLE ELECTROCATALYSTSCATALYTIC-ACTIVITYTRANSITION-METALSCATHODE CATALYSTSFACILE SYNTHESISCARBON-MONOXIDE
ISSN
1936-0851
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-graphene-oxide (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, half-wave 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 1-13. These exceptional properties would make the hybrid applicable in next-generation electrochemical energy devices. © 2013 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/1695
DOI
10.1021/nn4038404
Publisher
American Chemical Society
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Department of New Biology CBRG(Complex Biology Research Group) 1. Journal Articles

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