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Interconnected Pt-Nanodendrite/DNA/Reduced-Graphene-Oxide Hybrid Showing Remarkable Oxygen Reduction Activity and Stability
- Interconnected Pt-Nanodendrite/DNA/Reduced-Graphene-Oxide Hybrid Showing Remarkable Oxygen Reduction Activity and Stability
- Tiwari, Jitendra N.; Kemp, Kingsley Christian; Nath, Krishna; Tiwari, Rajanish N.; Nam, Hong-Gil; Kim, Kwang S.
- DGIST Authors
- Nam, Hong-Gil
- Issue Date
- ACS Nano, 7(10), 9223-9231
- Article Type
- Catalyst Activity; Catalytic Activity; DNA; Electrochemical Energy; Electrolytic Reduction; Fuel Cells; Graphene; Half-Wave Potential; Morphology and Size; Nanodendrites; Oxygen Reduction; Oxygen Reduction Reaction; Platinum; Pt Nanodendrites; Rate Determining Step; U.S. Department of Energy
- 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.
- American Chemical Society
- Related Researcher
Nam, Hong Gil
CBRG(Complex Biology Research Group)
Plant Aging and Life History; Systems Biology; Complexbiology; Comparative Aging Research
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- Department of New BiologyCBRG(Complex Biology Research Group)1. Journal Articles
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