Catalytic gold nano-particles

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Show simple item record Cortie, MB Van Der Lingen, E 2010-05-28T09:49:29Z 2002
dc.identifier.citation Materials Forum, 2002, 26 pp. 1 - 14
dc.identifier.issn 0883-2900
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Although gold is the most inert of all metallic elements, it has interesting properties as a heterogeneous catalyst. There are a number of curious aspects to catalysis by gold that are currently attracting academic investigation, while the observation that gold-based catalysts are active at room temperature and below is driving considerable industrial interest. However, much is still not understood about these catalysts and, for example, apparently similar preparation techniques result in activities of hugely varying magnitude. In the present paper we assess the known phenomenology of heterogeneous catalysis by gold, with particular reference to the material properties of the individual nano-particles of catalyst and the many disagreements in the literature. Even the structure of the nano-particles is uncertain, with claims being made for truncated octahedra, cub-octahedra, icosahedra, various kinds of decahedra, and amorphous structures. As far as uncertainty concerning the mechanism of catalysis is concerned, we show that the situation has not yet been resolved, with evidence that catalysis can proceed even in the absence of either a discrete particulate morphology or an oxide support. One possibility is that more than one mechanism applies. Alternatively, the explanation may be that the activity of gold as a catalyst is determined only by the availability of surface gold atoms with low coordination numbers and an associated electron density suitable for whatever reaction is being catalysed. In this case, the role of the oxide support and of gold particle size and structure is indirect, and they would serve mainly to modulate the specific surface area of the gold, and the electronic configuration of its surface atoms.
dc.language eng
dc.title Catalytic gold nano-particles
dc.type Journal Article
dc.parent Materials Forum
dc.journal.volume 26
dc.journal.number en_US
dc.publocation North Melbourne, Australia en_US
dc.identifier.startpage 1 en_US
dc.identifier.endpage 14 en_US SCI.Physics and Advanced Materials en_US
dc.conference Verified OK en_US
dc.for 0204 Condensed Matter Physics
dc.for 0912 Materials Engineering
dc.for 1007 Nanotechnology
dc.personcode 020302
dc.percentage 40 en_US Nanotechnology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Open Access 2015-04-15 12:23:47.074767+10 2015-04-15 12:23:47.074767+10
pubs.consider-herdc false
pubs.consider-herdc false
utslib.collection.history Uncategorised (ID: 363)
utslib.collection.history General (ID: 2)
utslib.collection.history General (ID: 2)

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