Controlling Platinum Active Sites on Silver Nanoparticles for Hydrogen Evolution Reaction

Mariandry, K; Kokate, R; Somerville, SV; Gloag, L; Cheong, S; Carroll, LR; Kumar, PV; Gooding, JJ; Tilley, RD

Controlling Platinum Active Sites on Silver Nanoparticles for Hydrogen Evolution Reaction

Mariandry, K Kokate, R Somerville, SV Gloag, L

Cheong, S Carroll, LR Kumar, PV Gooding, JJ Tilley, RD

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: Chemistry of Materials, 2023, 35, (20), pp. 8636-8644
Issue Date:: 2023-10-24

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Field	Value	Language
dc.contributor.author	Mariandry, K
dc.contributor.author	Kokate, R
dc.contributor.author	Somerville, SV
dc.contributor.author	Gloag, L https://orcid.org/0000-0001-7548-1521
dc.contributor.author	Cheong, S
dc.contributor.author	Carroll, LR
dc.contributor.author	Kumar, PV
dc.contributor.author	Gooding, JJ
dc.contributor.author	Tilley, RD
dc.date.accessioned	2024-03-15T01:53:41Z
dc.date.available	2024-03-15T01:53:41Z
dc.date.issued	2023-10-24
dc.identifier.citation	Chemistry of Materials, 2023, 35, (20), pp. 8636-8644
dc.identifier.issn	0897-4756
dc.identifier.issn	1520-5002
dc.identifier.uri	http://hdl.handle.net/10453/176753
dc.description.abstract	Growing Pt on Ag nanoparticles is a promising approach to forming catalysts that present active sites with both Pt and Ag available to improve the activity for the hydrogen evolution reaction (HER). By carefully controlling the concentration of a Pt precursor, the amount of Pt-decorated particles onto the Ag nanoparticles could be controlled to grow Pt islands between 0.6 and 1.5 nm. As a result, the relative amounts of the Ag-Pt active sites could be tuned. The smallest, 0.6 nm Pt islands on the Ag nanoparticle, with the highest ratio of Ag-Pt to Pt-Pt sites was found to have the highest activity and an accelerated Volmer step. DFT modeling showed that the improved performance was due to increased electron density on Pt from electron donation from neighboring Ag that leads to weaker Pt-H binding and the presence of more oxophilic Ag that can bind −OH on the active site that accelerates the water splitting.
dc.language	English
dc.publisher	AMER CHEMICAL SOC
dc.relation	http://purl.org/au-research/grants/arc/LE200100033
dc.relation.ispartof	Chemistry of Materials
dc.relation.isbasedon	10.1021/acs.chemmater.3c01765
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Materials
dc.subject.classification	34 Chemical sciences
dc.subject.classification	40 Engineering
dc.title	Controlling Platinum Active Sites on Silver Nanoparticles for Hydrogen Evolution Reaction
dc.type	Journal Article
utslib.citation.volume	35
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
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	closed_access	*
dc.date.updated	2024-03-15T01:53:35Z
pubs.issue	20
pubs.publication-status	Published
pubs.volume	35
utslib.citation.issue	20

Abstract:

Growing Pt on Ag nanoparticles is a promising approach to forming catalysts that present active sites with both Pt and Ag available to improve the activity for the hydrogen evolution reaction (HER). By carefully controlling the concentration of a Pt precursor, the amount of Pt-decorated particles onto the Ag nanoparticles could be controlled to grow Pt islands between 0.6 and 1.5 nm. As a result, the relative amounts of the Ag-Pt active sites could be tuned. The smallest, 0.6 nm Pt islands on the Ag nanoparticle, with the highest ratio of Ag-Pt to Pt-Pt sites was found to have the highest activity and an accelerated Volmer step. DFT modeling showed that the improved performance was due to increased electron density on Pt from electron donation from neighboring Ag that leads to weaker Pt-H binding and the presence of more oxophilic Ag that can bind −OH on the active site that accelerates the water splitting.

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http://hdl.handle.net/10453/176753