Graphene-Co<inf>3</inf>O<inf>4</inf> nanocomposite as electrocatalyst with high performance for oxygen evolution reaction

Zhao, Y; Chen, S; Sun, B; Su, D; Huang, X; Liu, H; Yan, Y; Sun, K; Wang, G

Graphene-Co<inf>3</inf>O<inf>4</inf> nanocomposite as electrocatalyst with high performance for oxygen evolution reaction

Zhao, Y

Chen, S Sun, B

Su, D

Huang, X

Liu, H

Yan, Y Sun, K Wang, G

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Publication Type:: Journal Article
Citation:: Scientific Reports, 2015, 5
Issue Date:: 2015-01-06

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Field	Value	Language
dc.contributor.author	Zhao, Y https://orcid.org/0000-0002-8653-8666	en_US
dc.contributor.author	Chen, S	en_US
dc.contributor.author	Sun, B https://orcid.org/0000-0002-4365-486X	en_US
dc.contributor.author	Su, D https://orcid.org/0000-0002-3972-8205	en_US
dc.contributor.author	Huang, X https://orcid.org/0000-0002-1929-653X	en_US
dc.contributor.author	Liu, H https://orcid.org/0000-0003-0266-9472	en_US
dc.contributor.author	Yan, Y	en_US
dc.contributor.author	Sun, K	en_US
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578	en_US
dc.date.available	2014-11-04	en_US
dc.date.issued	2015-01-06	en_US
dc.identifier.citation	Scientific Reports, 2015, 5	en_US
dc.identifier.uri	http://hdl.handle.net/10453/36532
dc.description.abstract	Graphene-Co3O4 composite with a unique sandwich-architecture was successfully synthesized and applied as an efficient electrocatalyst for oxygen evolution reaction. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) analyses confirmed that Co3O4 nanocrystals were homogeneously distributed on both sides of graphene nanosheets. The obtained composite shows enhanced catalytic activities in both alkaline and neutral electrolytes. The onset potential towards the oxygen evolution reaction is 0.406 V (vs. Ag/AgCl) in 1 M KOH solution, and 0.858 V (vs. Ag/AgCl) in neutral phosphate buffer solution (PBS), respectively. The current density of 10 mA/cm2 has been achieved at the overpotential of 313 mV in 1M KOH and 498mV in PBS. The graphene-Co3O4 composite also exhibited an excellent stability in both alkaline and neutral electrolytes. In particular, no obvious current density decay was observed after 10 hours testing in alkaline solution and the morphology of the material was well maintained, which could be ascribed to the synergistic effect of combining Co3O4 and graphene.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP1093855
dc.relation	http://purl.org/au-research/grants/arc/FT110100800
dc.relation.ispartof	Scientific Reports	en_US
dc.relation.isbasedon	10.1038/srep07629	en_US
dc.title	Graphene-Co<inf>3</inf>O<inf>4</inf> nanocomposite as electrocatalyst with high performance for oxygen evolution reaction	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Chemistry and Forensic Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	open_access
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

Graphene-Co3O4 composite with a unique sandwich-architecture was successfully synthesized and applied as an efficient electrocatalyst for oxygen evolution reaction. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) analyses confirmed that Co3O4 nanocrystals were homogeneously distributed on both sides of graphene nanosheets. The obtained composite shows enhanced catalytic activities in both alkaline and neutral electrolytes. The onset potential towards the oxygen evolution reaction is 0.406 V (vs. Ag/AgCl) in 1 M KOH solution, and 0.858 V (vs. Ag/AgCl) in neutral phosphate buffer solution (PBS), respectively. The current density of 10 mA/cm2 has been achieved at the overpotential of 313 mV in 1M KOH and 498mV in PBS. The graphene-Co3O4 composite also exhibited an excellent stability in both alkaline and neutral electrolytes. In particular, no obvious current density decay was observed after 10 hours testing in alkaline solution and the morphology of the material was well maintained, which could be ascribed to the synergistic effect of combining Co3O4 and graphene.

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http://hdl.handle.net/10453/36532