Details

Autor(en) / Beteiligte

• Ruzicka, Jan-Yves
• Abu Bakar, Faridah
• Hoeck, Christoffer
• Adnan, Rohul
• McNicoll, Campbell
• Kemmitt, Tim
• Cowie, Bruce C
• Metha, Gregory F
• Andersson, Gunther G
• Golovko, Vladimir B

Titel

Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments

Ist Teil von

• Journal of physical chemistry. C, 2015-10, Vol.119 (43), p.24465-24474

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Well-defined Au–TiO2 materials were synthesized by deposition of triphenylphosphine-protected Au9 clusters on TiO2 (Aeroxide P-25), pre-treated in eight different ways and subsequently exposed to two post-treatments. X-ray photoelectron spectroscopy and UV–vis diffuse reflectance spectroscopy studies showed that in most cases the PPh3 ligand shell was removed upon deposition even before post-treatment, coinciding with some cluster aggregation. However, clusters deposited on TiO2 treated using H2SO4 and H2O2 showed remarkable resistance to aggregation, even after high-temperature calcination, while clusters on H2-treated TiO2 showed the greatest resistance to aggregation under ozonolysis.