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Highly efficient and robust oxygen evolution catalysts achieved by anchoring nanocrystalline cobalt oxides onto mildly oxidized multiwalled carbon nanotubes

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Journal of Materials Chemistry A Vol - 1 Issue - 29

Journal of Materials Chemistry A Vol - 1 Issue - 19

Journal of Materials Chemistry A Vol - 1 Issue - 9

Journal of Materials Chemistry A Vol - 1 Issue - 8

Journal of Materials Chemistry A Vol - 1 Issue - 7

Journal of Materials Chemistry A Vol - 1 Issue - 6

Journal of Materials Chemistry A Vol - 1 Issue - 5

Highly efficient and robust oxygen evolution catalysts achieved by anchoring nanocrystalline cobalt oxides onto mildly oxidized multiwalled carbon nanotubes

Content Provider	Royal Society of Chemistry (RSC)
Author	Lu, Xunyu Zhao, Chuan
Copyright Year	2013
Abstract	Crystalline cobalt oxide nanoparticles have been densely and strongly anchored onto mildly oxidized multiwalled carbon nanotubes (Co3O4/mMWCNT) and applied as electrocatalysts for highly efficient water oxidation. The hybrid catalyses oxygen evolution reactions (OER) with an onset potential of 1.51 V vs. RHE and an overpotential only of 390 mV to achieve a current density of 10 mA cm−2. The Co3O4/mMWCNT catalyst exhibits high Faraday efficiency (>99%) and long-term stability (>25 h) during bulk electrolysis of water. A range of carbon nanostructures including MWCNTs, single-walled CNTs (SWCNTs), and graphene, and CNTs of different oxidation states have been prepared and applied as substrates for Co3O4 nanocrystals and their performance is compared to reveal the interrelationship between the nanocarbon structure, surface functionalization and charge transport for rational design of OER catalysts. Furthermore, a range of techniques has been utilized to characterize the stability of MWCNT substrates during water oxidation. Importantly, it is found that the MWCNTs in the composite can sustain the harsh oxidative environment of water oxidation, with no carbon corrosion detected.
Starting Page	12053
Ending Page	12059
Page Count	7
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	39
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta12912h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	RHE Cobalt oxide nanoparticle Carbon nanotube Catalysis Oxygen evolution Overpotential Current density Faraday efficiency Electrolysis Carbon Graphene Corrosion
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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