Electrochemical capacitance of mesoporous gold

Cortie, MB; Maaroof, AI; Smith, GB

Electrochemical capacitance of mesoporous gold

Cortie, MB

Maaroof, AI Smith, GB

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Publication Type:: Journal Article
Citation:: Gold Bulletin, 2005, 38 (1), pp. 14 - 22
Issue Date:: 2005-01-01

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Field	Value	Language
dc.contributor.author	Cortie, MB https://orcid.org/0000-0003-3202-6398	en_US
dc.contributor.author	Maaroof, AI	en_US
dc.contributor.author	Smith, GB https://orcid.org/0000-0002-6985-2880	en_US
dc.date.issued	2005-01-01	en_US
dc.identifier.citation	Gold Bulletin, 2005, 38 (1), pp. 14 - 22	en_US
dc.identifier.issn	0017-1557	en_US
dc.identifier.uri	http://hdl.handle.net/10453/781
dc.description.abstract	The surfaces of nanoscale gold particles and components are oxide-free under normal ambient conditions. This unusual attribute permits the exploration of microstructures and functionalities that would not be feasible for less noble metals. Here we consider the electrochemical properties of mesoporous gold sponges, prepared by de-alloying an AuAl2 precursor. The sponges have a high specific surface area, with an average pore diameter of 12 nm, but are prone to sinter. They may be prepared in bulk, or, more usefully, as coatings. Their electrochemical capacitance divided by their nominal surface area is high and, at a cell voltage of 0.6 V, reaches 100 mF/cm2 for bulk samples and 2 mF/cm2 for coatings. This is up to a thousand times greater than the 50 to 100 μF/cm2 exhibited by a planar gold surface.	en_US
dc.relation.ispartof	Gold Bulletin	en_US
dc.relation.isbasedon	10.1007/BF03215223	en_US
dc.title	Electrochemical capacitance of mesoporous gold	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	38	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0302 Inorganic Chemistry	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	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	38	en_US

Abstract:

The surfaces of nanoscale gold particles and components are oxide-free under normal ambient conditions. This unusual attribute permits the exploration of microstructures and functionalities that would not be feasible for less noble metals. Here we consider the electrochemical properties of mesoporous gold sponges, prepared by de-alloying an AuAl2 precursor. The sponges have a high specific surface area, with an average pore diameter of 12 nm, but are prone to sinter. They may be prepared in bulk, or, more usefully, as coatings. Their electrochemical capacitance divided by their nominal surface area is high and, at a cell voltage of 0.6 V, reaches 100 mF/cm2 for bulk samples and 2 mF/cm2 for coatings. This is up to a thousand times greater than the 50 to 100 μF/cm2 exhibited by a planar gold surface.

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http://hdl.handle.net/10453/781