Synthesis of hierarchical metal nanostructures with high electrocatalytic surface areas.

Gloag, L; Poerwoprajitno, AR; Cheong, S; Ramadhan, ZR; Adschiri, T; Gooding, JJ; Tilley, RD

Synthesis of hierarchical metal nanostructures with high electrocatalytic surface areas.

Gloag, L

Poerwoprajitno, AR Cheong, S Ramadhan, ZR Adschiri, T Gooding, JJ Tilley, RD

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Publisher:: AMER ASSOC ADVANCEMENT SCIENCE
Publication Type:: Journal Article
Citation:: Sci Adv, 2023, 9, (2), pp. eadf6075
Issue Date:: 2023-01-13

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Field	Value	Language
dc.contributor.author	Gloag, L https://orcid.org/0000-0001-7548-1521
dc.contributor.author	Poerwoprajitno, AR
dc.contributor.author	Cheong, S
dc.contributor.author	Ramadhan, ZR
dc.contributor.author	Adschiri, T
dc.contributor.author	Gooding, JJ
dc.contributor.author	Tilley, RD
dc.date.accessioned	2024-03-15T03:05:21Z
dc.date.available	2024-03-15T03:05:21Z
dc.date.issued	2023-01-13
dc.identifier.citation	Sci Adv, 2023, 9, (2), pp. eadf6075
dc.identifier.issn	2375-2548
dc.identifier.issn	2375-2548
dc.identifier.uri	http://hdl.handle.net/10453/176762
dc.description.abstract	3D interconnected structures can be made with molecular precision or with micrometer size. However, there is no strategy to synthesize 3D structures with dimensions on the scale of tens of nanometers, where many unique properties exist. Here, we bridge this gap by building up nanosized gold cores and nickel branches that are directly connected to create hierarchical nanostructures. The key to this approach is combining cubic crystal-structured cores with hexagonal crystal-structured branches in multiple steps. The dimensions and 3D morphology can be controlled by tuning at each synthetic step. These materials have high surface area, high conductivity, and surfaces that can be chemically modified, which are properties that make them ideal electrocatalyst supports. We illustrate the effectiveness of the 3D nanostructures as electrocatalyst supports by coating with nickel-iron oxyhydroxide to achieve high activity and stability for oxygen evolution reaction. This work introduces a synthetic concept to produce a new type of high-performing electrocatalyst support.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER ASSOC ADVANCEMENT SCIENCE
dc.relation	http://purl.org/au-research/grants/arc/LE200100033
dc.relation.ispartof	Sci Adv
dc.relation.isbasedon	10.1126/sciadv.adf6075
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Synthesis of hierarchical metal nanostructures with high electrocatalytic surface areas.
dc.type	Journal Article
utslib.citation.volume	9
utslib.location.activity	United States
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	*
dc.date.updated	2024-03-15T03:05:20Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	9
utslib.citation.issue	2

Abstract:

3D interconnected structures can be made with molecular precision or with micrometer size. However, there is no strategy to synthesize 3D structures with dimensions on the scale of tens of nanometers, where many unique properties exist. Here, we bridge this gap by building up nanosized gold cores and nickel branches that are directly connected to create hierarchical nanostructures. The key to this approach is combining cubic crystal-structured cores with hexagonal crystal-structured branches in multiple steps. The dimensions and 3D morphology can be controlled by tuning at each synthetic step. These materials have high surface area, high conductivity, and surfaces that can be chemically modified, which are properties that make them ideal electrocatalyst supports. We illustrate the effectiveness of the 3D nanostructures as electrocatalyst supports by coating with nickel-iron oxyhydroxide to achieve high activity and stability for oxygen evolution reaction. This work introduces a synthetic concept to produce a new type of high-performing electrocatalyst support.

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http://hdl.handle.net/10453/176762