Open AccessToward Control of Gold Cluster Aggregation on TiO2 via Surface Treatments
Author(s) -
Jan-Yves Ruzicka,
Faridah Abu Bakar,
Christoffer Hoeck,
Rohul H. Adnan,
Campbell McNicoll,
Tim Kemmitt,
Bruce C. C. Cowie,
Gregory F. Metha,
Gunther G. Andersson,
Vladimir B. Golovko
Publication year - 2015
Publication title -
the journal of physical chemistry c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 289
eISSN - 1932-7455
pISSN - 1932-7447
DOI - 10.1021/acs.jpcc.5b07732
Subject(s) - calcination , x ray photoelectron spectroscopy , cluster (spacecraft) , deposition (geology) , materials science , spectroscopy , chemistry , chemical engineering , catalysis , organic chemistry , physics , paleontology , quantum mechanics , sediment , computer science , engineering , biology , programming language
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.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom