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Issue 19, 2013
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A facile route to model catalysts: the synthesis of Au@Pd core–shell nanoparticles on γ-Fe2O3 (0001)

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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.

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

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Publication details

The article was received on 13 Jun 2013, accepted on 27 Jul 2013 and first published on 31 Jul 2013


Article type: Paper
DOI: 10.1039/C3NR03047D
Citation: Nanoscale, 2013,5, 9018-9022
  • Open access: Creative Commons BY license
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    A facile route to model catalysts: the synthesis of Au@Pd core–shell nanoparticles on γ-Fe2O3 (0001)

    R. J. Davies, M. Bowker, P. R. Davies and D. J. Morgan, Nanoscale, 2013, 5, 9018
    DOI: 10.1039/C3NR03047D

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