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Controlled Electrodeposition of Nanoparticulate Tungsten Oxide
Nano Letters, 2002Nanoparticulate tungsten oxide films were synthesized by pulsed electrodeposition. Particle sizes between 45 and ∼330 nm were achieved by varying pulse duration from 5 to 500 ms. Shorter pulses increased the rate of new particle nucleation above the rate of existing particle growth, allowing for the observed variations in size.
Baeck, S. H. +3 more
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Tungsten oxides as catalysts in selective oxidation
Journal of Catalysis, 1983Abstract The reaction of allyl iodide was studied at the surface of four tungsten oxides and molybdenum trioxide. On WO2.95 and MoO3, in which crystallographic shear structures are formed on reduction, acrolein is produced at 300–400 °C, whereas W18O49 and WO2, which do not show this property, are inactive, as is WO3.
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Chemical Principles of the Sulfidation of Tungsten Oxides
The Journal of Physical Chemistry B, 2002The sulfidation of crystalline m-WO3 and WO3•H2O and the thermal decomposition of (NH4)2WO2S2 to an {WOS2} oxysulfide were studied by means of X-ray powder diffraction, quick extended X-ray absorption fine structure, and infrared emission spectroscopy.
Vlies, van der, A.J. +2 more
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Tungsten Oxides for Photocatalysis, Electrochemistry, and Phototherapy
Advanced Materials, 2015The conversion, storage, and utilization of renewable energy have all become more important than ever before as a response to ever‐growing energy and environment concerns. The performance of energy‐related technologies strongly relies on the structure and property of the material used.
Zhen-Feng, Huang +5 more
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Journal of The Electrochemical Society, 1975
The anodic oxidation of hydrogen at platinized electrodes of the lower tungsten oxides occurs via a route involving hydrogen tungsten bronze formation on the surface of film Initial performance of the platinized lower tungsten oxide electrodes is lower than the corresponding electrodes.
B. S. Hobbs, A. C. C. Tseung
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The anodic oxidation of hydrogen at platinized electrodes of the lower tungsten oxides occurs via a route involving hydrogen tungsten bronze formation on the surface of film Initial performance of the platinized lower tungsten oxide electrodes is lower than the corresponding electrodes.
B. S. Hobbs, A. C. C. Tseung
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Synthesis and characterization of tungsten and tungsten oxide nanostructured films
Catalysis Today, 2006Abstract Nanostructured tungsten and tungsten oxide films have been synthesized by pulsed laser deposition (PLD) in different atmospheres (He, Ar, dry air). The control of the gas pressure in the deposition chamber allows to vary the morphology of the deposited films (studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM ...
DI FONZO, FABIO +9 more
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Formation of Tungsten Oxide Defects during Tungsten CMP
Electrochemical and Solid-State Letters, 2003Most tungsten chemical mechanical polishing (CMP) processes utilize a subsequent cleaning process referred to as post-CMP cleaning for removal of contaminated layers. Even after a proper post-CMP cleaning has treated polished wafers, several defects such as slurry particles, microscratches, and metallic impurities are still easily observable.
Jong Yeol Jeong, Won Gyu Lee
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The effect of oxidation state of tungsten on hydrocracking of n-heptane over tungsten oxide
Journal of Catalysis, 1973Abstract Hydrocracking of n-heptane was investigated with tungsten oxide of various oxidation states under high pressure of hydrogen. It was found that the reaction products definitely change four times with changing oxidation state during the course of reduction of tungsten trioxide. In the presence of slightly reduced tungsten oxide WO3 − a (WO2.84,
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Making tungsten targets using tungsten oxide powder
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011Abstract A straightforward method of making tungsten targets from tungsten oxide powder on Cu backing is presented. A ceramic crucible containing WO3 powder placed on a copper foil is heated in hydrogen atmosphere at temperatures ranging from 650 up to 850 °C.
A.R. Lipski, R.S. Lefferts
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Structural and electrical properties in tungsten/tungsten oxide multilayers
Thin Solid Films, 2014Abstract Tungsten and tungsten oxide periodic nanometric multilayers have been deposited by DC reactive sputtering using the reactive gas pulsing process. Different pulsing periods have been used for each deposition to produce metal-oxide periodic alternations ranging from 3.3 to 71.5 nm.
Cacucci, Arnaud +3 more
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