A facile route to model catalysts: the synthesis of Au@Pd core-shell nanoparticles on y-Fe2O3 (0001)

Davies, Robert J., Bowker, Michael ORCID: https://orcid.org/0000-0001-5075-1089, Davies, Philip Rosser ORCID: https://orcid.org/0000-0003-4394-766X and Morgan, David John ORCID: https://orcid.org/0000-0002-6571-5731 2013. A facile route to model catalysts: the synthesis of Au@Pd core-shell nanoparticles on y-Fe2O3 (0001). Nanoscale 5 , pp. 9018-9022. 10.1039/c3nr03047d

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Abstract

A straightforward method of synthesising Au@Pd core–shell particles on a well characterised γ-Fe2O3 (0001) substrate has been developed which will enable fundamental studies into the surface chemistry of these catalytically interesting systems. Au and Pd were sequentially deposited onto a γ-Fe2O3 (0001) substrate in ultra high vacuum by metal vapour deposition and probed by LEIS and STM. Deposition of Au followed by heating at 573 K formed nanoparticles of 5 to 10 nm in diameter whereas subsequent deposition of Pd produced smaller nanoparticles of 2 to 4 nm diameter. At this stage, LEIS shows both metals to be present but heating the combined system to 573 K resulted in the loss of the Au signal in the LEIS and disappearance of the smaller particles from the STM images indicating the formation of Au@Pd core–shell structures.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Cardiff Catalysis Institute (CCI) Chemistry
Subjects:	Q Science > QD Chemistry
Publisher:	Royal Society of Chemistry
ISSN:	2040-3372
Funders:	EPSRC
Date of First Compliant Deposit:	30 March 2016
Last Modified:	10 Apr 2024 07:03
URI:	https://orca.cardiff.ac.uk/id/eprint/49984

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