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

19 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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title = "Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments",

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.",

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

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journal = "Journal of Physical Chemistry C",

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Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments. / Ruzicka, Jan-Yves; Bakar, Faridah; Hoeck, Christoffer; Adnan, Rohul; McNicoll, Campbell; Kemmitt, Tim; Cowie, Bruce; Metha, Gregory; Andersson, Gunther; Golovko, Vladimir.

In: Journal of Physical Chemistry C, Vol. 119, No. 43, 2015, p. 24465-24474.

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

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T1 - Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments

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

N2 - 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.

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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DO - 10.1021/acs.jpcc.5b07732

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SP - 24465

EP - 24474

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 43

ER -

Toward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments

Abstract

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