Chemically-synthesised, atomically-precise gold clusters deposited and activated on titania

David Anderson; Jason Alvino; Alexander Gentleman; Hassan Al Qahtani; Lars Thomsen; Matthew Polson; Gregory Metha; Vladimir Golovko; Gunther Andersson

doi:10.1039/c3cp44005b

Chemically-synthesised, atomically-precise gold clusters deposited and activated on titania

David Anderson, Jason Alvino, Alexander Gentleman, Hassan Al Qahtani, Lars Thomsen, Matthew Polson, Gregory Metha, Vladimir Golovko, Gunther Andersson

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

115 Citations (Scopus)

Abstract

Synchrotron XPS was used to investigate a series of chemically-synthesised, atomically-precise gold clusters Au_n(PPh₃)_y (n = 8, 9, 11 and 101, with y depending on cluster size) immobilized on titania nanoparticles. The gold clusters were washed with toluene at 100 °C or calcined at 200 °C to remove the organic ligand. From the position of the Au 4f_7/2 peak it is concluded that cluster size is not altered through the deposition. From the analysis of the phosphorous spectra, it can be concluded that the applied heat treatment removes the organic ligands. Washing and calcination leads to partial oxidation and partial agglomeration of the clusters. Oxidation of the clusters is most likely due to the interaction of the cluster core with the oxygen of the titania surface after removal of ligands. The position of the Au 4f_7/2 peak indicates that the size of the agglomerated clusters is still smaller than that of Au₁₀₁.

Original language	English
Pages (from-to)	3917-3929
Number of pages	13
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	11
DOIs	https://doi.org/10.1039/c3cp44005b
Publication status	Published - 21 Mar 2013

Access to Document

10.1039/c3cp44005b

Cite this

@article{e354cc409af847b0a64dabccd65c1cb1,

title = "Chemically-synthesised, atomically-precise gold clusters deposited and activated on titania",

abstract = "Synchrotron XPS was used to investigate a series of chemically-synthesised, atomically-precise gold clusters Aun(PPh3)y (n = 8, 9, 11 and 101, with y depending on cluster size) immobilized on titania nanoparticles. The gold clusters were washed with toluene at 100 °C or calcined at 200 °C to remove the organic ligand. From the position of the Au 4f7/2 peak it is concluded that cluster size is not altered through the deposition. From the analysis of the phosphorous spectra, it can be concluded that the applied heat treatment removes the organic ligands. Washing and calcination leads to partial oxidation and partial agglomeration of the clusters. Oxidation of the clusters is most likely due to the interaction of the cluster core with the oxygen of the titania surface after removal of ligands. The position of the Au 4f7/2 peak indicates that the size of the agglomerated clusters is still smaller than that of Au101.",

author = "David Anderson and Jason Alvino and Alexander Gentleman and {Al Qahtani}, Hassan and Lars Thomsen and Matthew Polson and Gregory Metha and Vladimir Golovko and Gunther Andersson",

year = "2013",

month = mar,

day = "21",

doi = "10.1039/c3cp44005b",

language = "English",

volume = "15",

pages = "3917--3929",

journal = "Physical Chemistry Chemical Physics",

issn = "1463-9076",

publisher = "Royal Society of Chemistry",

number = "11",

}

TY - JOUR

T1 - Chemically-synthesised, atomically-precise gold clusters deposited and activated on titania

AU - Anderson, David

AU - Alvino, Jason

AU - Gentleman, Alexander

AU - Al Qahtani, Hassan

AU - Thomsen, Lars

AU - Polson, Matthew

AU - Metha, Gregory

AU - Golovko, Vladimir

AU - Andersson, Gunther

PY - 2013/3/21

Y1 - 2013/3/21

N2 - Synchrotron XPS was used to investigate a series of chemically-synthesised, atomically-precise gold clusters Aun(PPh3)y (n = 8, 9, 11 and 101, with y depending on cluster size) immobilized on titania nanoparticles. The gold clusters were washed with toluene at 100 °C or calcined at 200 °C to remove the organic ligand. From the position of the Au 4f7/2 peak it is concluded that cluster size is not altered through the deposition. From the analysis of the phosphorous spectra, it can be concluded that the applied heat treatment removes the organic ligands. Washing and calcination leads to partial oxidation and partial agglomeration of the clusters. Oxidation of the clusters is most likely due to the interaction of the cluster core with the oxygen of the titania surface after removal of ligands. The position of the Au 4f7/2 peak indicates that the size of the agglomerated clusters is still smaller than that of Au101.

AB - Synchrotron XPS was used to investigate a series of chemically-synthesised, atomically-precise gold clusters Aun(PPh3)y (n = 8, 9, 11 and 101, with y depending on cluster size) immobilized on titania nanoparticles. The gold clusters were washed with toluene at 100 °C or calcined at 200 °C to remove the organic ligand. From the position of the Au 4f7/2 peak it is concluded that cluster size is not altered through the deposition. From the analysis of the phosphorous spectra, it can be concluded that the applied heat treatment removes the organic ligands. Washing and calcination leads to partial oxidation and partial agglomeration of the clusters. Oxidation of the clusters is most likely due to the interaction of the cluster core with the oxygen of the titania surface after removal of ligands. The position of the Au 4f7/2 peak indicates that the size of the agglomerated clusters is still smaller than that of Au101.

UR - http://www.scopus.com/inward/record.url?scp=84874031492&partnerID=8YFLogxK

U2 - 10.1039/c3cp44005b

DO - 10.1039/c3cp44005b

M3 - Article

SN - 1463-9076

VL - 15

SP - 3917

EP - 3929

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 11

ER -

Chemically-synthesised, atomically-precise gold clusters deposited and activated on titania

Abstract

Access to Document

Other files and links

Fingerprint

Cite this