7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

First principle study: adsorption of molecular hydrogen sulphide on transitional gold cluster (Aun=1-5)

9 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: G.68
Poster Presentation Track G - Theoretical and Computational Physics Poster2


Mr Emmanuel Igumbor (University of Pretoria)

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We present theoretical results of the study of H2S adsorption on gold cluster Aun(n = 1- 5) using density functional theory with Perdew-Burke-Ernzerhof (PBE) exchange-correlation energy functional. Minimum energy structures of the gold cluster along with their isomers are considered in the optimization process. H2S molecule is observed to adsorb on to the gold cluster. However, the adsorption energy decreases with increasing cluster size. The structures of the gold clusters are similar before and after adsorption of H2S molecule. The structures of gold cluster remain planar. The adsorbed molecules get adjusted in a way that their center of mass lie on the plane of the gold cluster. The adsorbed molecules get attached to a single gold atom and there is no preference to get adsorbed in between the gold. H2S dissociation is not favoured on the Au clusters since it demands extra energy to dissociate which is costly.

Primary author

Mr Emmanuel Igumbor (University of Pretoria)

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