Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments

Jan-Yves Ruzicka; Faridah Bakar; Christoffer Hoeck; Rohul Adnan; Campbell McNicoll; Tim Kemmitt; Bruce Cowie; Gregory Metha; Gunther Andersson; Vladimir Golovko

doi:10.1021/acs.jpcc.5b07732

Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments

Jan-Yves Ruzicka, Faridah Bakar, Christoffer Hoeck, Rohul Adnan, Campbell McNicoll, Tim Kemmitt, Bruce Cowie, Gregory Metha, Gunther Andersson, Vladimir Golovko

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	24465-24474
Number of pages	10
Journal	Journal of Physical Chemistry C
Volume	119
Issue number	43
DOIs	https://doi.org/10.1021/acs.jpcc.5b07732
Publication status	Published - 2015

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abstract = "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.",

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AU - Ruzicka, Jan-Yves

AU - Bakar, Faridah

AU - Hoeck, Christoffer

AU - Adnan, Rohul

AU - McNicoll, Campbell

AU - Kemmitt, Tim

AU - Cowie, Bruce

AU - Metha, Gregory

AU - Andersson, Gunther

AU - Golovko, Vladimir

PY - 2015

Y1 - 2015

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AB - 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.

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EP - 24474

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

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ER -

Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments

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