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Issue 35, 2013
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Chemically synthesised atomically precise gold clusters deposited and activated on titania. Part II

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Abstract

Synchrotron XPS was used to investigate a series of chemically synthesised, atomically precise gold clusters Aun(PPh3)y (n = 8, 9 and 101, y depending on the cluster size) immobilized on anatase (titania) nanoparticles. Effects of post-deposition treatments were investigated by comparison of untreated samples with analogues that have been heat treated at 200 °C in O2, or in O2 followed by H2 atmosphere. XPS data shows that the phosphine ligands are oxidised upon heat treatment in O2. From the position of the Au 4f7/2 peak it can be concluded that the clusters partially agglomerate immediately upon deposition. Heating in oxygen, and subsequently in hydrogen, leads to further agglomeration of the gold clusters. It is found that the pre-treatment plays a crucial role in the removal of ligands and agglomeration of the clusters.

Graphical abstract: Chemically synthesised atomically precise gold clusters deposited and activated on titania. Part II

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Article information


Submitted
16 Jun 2013
Accepted
24 Jul 2013
First published
24 Jul 2013

This article is Open Access

Phys. Chem. Chem. Phys., 2013,15, 14806-14813
Article type
Paper

Chemically synthesised atomically precise gold clusters deposited and activated on titania. Part II

D. P. Anderson, R. H. Adnan, J. F. Alvino, O. Shipper, B. Donoeva, J. Ruzicka, H. Al Qahtani, H. H. Harris, B. Cowie, J. B. Aitken, V. B. Golovko, G. F. Metha and G. G. Andersson, Phys. Chem. Chem. Phys., 2013, 15, 14806
DOI: 10.1039/C3CP52497C

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