Formation of Ruthenium Cluster on Nanocrystalline Tungsten Trioxide

被引：15

作者：

Fujioka, Y. ^{[1
]}

Frantti, J. ^{[1
]}

Nieminen, R. M. ^{[1
]}

Asiri, A. M. ^{[2
,3
]}

机构：

[1] Aalto Univ, Sch Sci, Dept Appl Phys, FI-00076 Aalto, Finland

[2] King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah 21589, Saudi Arabia

[3] King Abdulaziz Univ, Fac Sci, Ctr Excellence Adv Mat Res, Jeddah 21589, Saudi Arabia

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 15期

基金：

芬兰科学院;

关键词：

SUPPORTED RUTHENIUM; SELECTIVE OXIDATION; OXIDE CATALYSTS; METHYL FORMATE; METAL DIOXIDES; THIN-FILMS; TEMPERATURE; METHANOL; CRYSTAL; RAMAN;

D O I：

10.1021/jp310038a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ruthenium (Ru)-modified (up to 1 wt %) tungsten trioxide (WO3) samples were synthesized and characterized by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), scanning and transmission electron microscopy, and Raman spectroscopy. Ru was found to form hexagonal clusters on {111} planes of the underlying WO3 crystals with similar arrangement as is found in metal Ru. XPS revealed that the valence state of ruthenium corresponds to the oxidized state. Results indicate that bonding between Ru and oxygen of the crystal surfaces is a key factor for the cluster formation. No evidence for a crystalline ruthenium oxide or metal phase formation was found instead Ru atoms were bonded on oxygen on the WO3 {111} planes.

引用

页码：7506 / 7510

页数：5

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