Ni-reduced graphene oxide composite cathodes with new hierarchical morphologies for electrocatalytic hydrogen generation in alkaline media

Chen, Z; Wang, L; Ma, Z; Song, J; Shao, G

Ni-reduced graphene oxide composite cathodes with new hierarchical morphologies for electrocatalytic hydrogen generation in alkaline media

Chen, Z Wang, L Ma, Z Song, J

Shao, G

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Publication Type:: Journal Article
Citation:: RSC Advances, 2017, 7 (2), pp. 704 - 711
Issue Date:: 2017-01-01

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Field	Value	Language
dc.contributor.author	Chen, Z	en_US
dc.contributor.author	Wang, L	en_US
dc.contributor.author	Ma, Z	en_US
dc.contributor.author	Song, J https://orcid.org/0000-0001-6515-5829	en_US
dc.contributor.author	Shao, G	en_US
dc.date.issued	2017-01-01	en_US
dc.identifier.citation	RSC Advances, 2017, 7 (2), pp. 704 - 711	en_US
dc.identifier.uri	http://hdl.handle.net/10453/127023
dc.description.abstract	© 2017 The Royal Society of Chemistry. Ni-reduced graphene oxide (rGO) composite cathodes were successfully prepared by composite electrodeposition under supergravity fields. The synthesized composite cathodes exhibit unique hierarchical structure with large numbers of Ni nanoparticles anchoring on the rGO surface. Specifically, the sample prepared from the electrolyte containing 0.7 g L-1 GO at rotational speed 3000 rpm displays a favorable activity toward the hydrogen evolution reaction (HER) in 1 M NaOH solution with a high exchange current density of 741.3 μA cm-2 and a low Tafel slope of 120 mV dec-1. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetric (CV) tests demonstrate that the superior catalytic activity should be ascribed to the enhanced active surface area and the improved intrinsic activity. Furthermore, the morphology and microstructure properties of Ni-rGO cathodes synthesized from various GO concentrations and supergravity fields are systematically investigated.	en_US
dc.relation.ispartof	RSC Advances	en_US
dc.relation.isbasedon	10.1039/c6ra24993k	en_US
dc.title	Ni-reduced graphene oxide composite cathodes with new hierarchical morphologies for electrocatalytic hydrogen generation in alkaline media	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.citation.volume	7	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	03 Chemical Sciences	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 Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	2	en_US
pubs.publication-status	Published	en_US
pubs.volume	7	en_US

Abstract:

© 2017 The Royal Society of Chemistry. Ni-reduced graphene oxide (rGO) composite cathodes were successfully prepared by composite electrodeposition under supergravity fields. The synthesized composite cathodes exhibit unique hierarchical structure with large numbers of Ni nanoparticles anchoring on the rGO surface. Specifically, the sample prepared from the electrolyte containing 0.7 g L-1 GO at rotational speed 3000 rpm displays a favorable activity toward the hydrogen evolution reaction (HER) in 1 M NaOH solution with a high exchange current density of 741.3 μA cm-2 and a low Tafel slope of 120 mV dec-1. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetric (CV) tests demonstrate that the superior catalytic activity should be ascribed to the enhanced active surface area and the improved intrinsic activity. Furthermore, the morphology and microstructure properties of Ni-rGO cathodes synthesized from various GO concentrations and supergravity fields are systematically investigated.

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http://hdl.handle.net/10453/127023