Formation of Molecularly Chemisorbed Oxygen on TiO2-Supported Gold Nanoclusters and Au(111) from Exposure to an Oxygen Plasma Jet

2005 ◽  
Vol 109 (13) ◽  
pp. 6316-6322 ◽  
Author(s):  
James D. Stiehl ◽  
Tae S. Kim ◽  
Sean M. McClure ◽  
C. Buddie Mullins
Keyword(s):  
Oxygen Plasma ◽  
Gold Nanoclusters ◽  
Plasma Jet ◽  
Chemisorbed Oxygen ◽  
Supported Gold

Reaction of CO with Molecularly Chemisorbed Oxygen on TiO2-Supported Gold Nanoclusters

2004 ◽  
Vol 126 (42) ◽  
pp. 13574-13575 ◽  
Author(s):  
James D. Stiehl ◽  
Tae S. Kim ◽  
Sean M. McClure ◽  
C. Buddie Mullins
Keyword(s):  
Gold Nanoclusters ◽  
Chemisorbed Oxygen ◽  
Supported Gold

Diagnostics of hydrogen-oxygen plasma jet for application in gas thermal spraying

2020 ◽  
Vol 2020 (11) ◽  
pp. 41-45
Author(s):  
Yu.S. Popil ◽  
◽  
V.M. Korzh ◽  
V.Ya. Chernyak ◽  
Ye.A. Zakharov ◽  
...  
Keyword(s):  
Oxygen Plasma ◽  
Thermal Spraying ◽  
Plasma Jet

Oxygen-plasma-assisted formaldehyde adsorption mechanism of SnO2 electrospun fibers

2021 ◽  
Author(s):  
Haiying Du ◽  
Yuxia Wu ◽  
Zhaorui Zhang ◽  
Wanmin He ◽  
Yanhui Sun ◽  
...  
Keyword(s):  
Oxygen Plasma ◽  
Adsorption Mechanism ◽  
Gas Sensing ◽  
High Energy ◽  
Plasma Modification ◽  
Electrospun Fibers ◽  
Chemisorbed Oxygen ◽  
Formaldehyde Sensing ◽  
Formaldehyde Adsorption ◽  
Sensing Performance

Abstract Abstract: Chemisorbed oxygen acts a crucial role in the redox reaction of semiconductor gas sensors, and which is of great significance for improving gas sensing performance. In this study, an oxygen-plasma-assisted technology is presented to enhance the chemisorbed oxygen for improving the formaldehyde sensing performance of SnO2 electropun fiber. An inductively coupled plasma device was used for oxygen plasma treatment of SnO2 electrospun fibers. The surface of SnO2 electrospun fibers was bombarded with high-energy oxygen plasma for facilitating the chemisorption of electronegative oxygen molecules on the SnO2 (110) surface to obtain an oxygen-rich structure. Oxygen-plasma-assisted SnO2 electrospun fibers exhibited excellent formaldehyde sensing performance. The formaldehyde adsorption mechanism of oxygen-rich SnO2 was investigated using density functional theory. After oxygen plasma modification, the adsorption energy and the charge transfer number of formaldehyde to SnO2 were increased significantly. And an unoccupied electronic state appeared in the SnO2 band structure, which could enhance the formaldehyde adsorption ability of SnO2. The gas sensing test revealed that plasma-treated SnO2 electrospun fibers exhibited excellent gas sensing properties to formaldehyde, low operating temperature, high response sensitivity, and considerable cross-selectivity. Thus, plasma modification is a simple and effective method to improve the gas sensing performance of sensors.

Oxidation Catalysis by Supported Gold Nanoclusters.

ChemInform ◽  
2003 ◽  
Vol 34 (20) ◽  
Author(s):  
T. V. Choudhary ◽  
D. W. Goodman
Keyword(s):  
Gold Nanoclusters ◽  
Oxidation Catalysis ◽  
Supported Gold

Atmospheric Pressure Cold Argon/Oxygen Plasma Jet Assisted by Preionization of Syringe Needle Electrode

2010 ◽  
Vol 12 (5) ◽  
pp. 561-565 ◽  
Author(s):  
Qian Muyang ◽  
Ren Chunsheng ◽  
Wang Dezhen ◽  
Feng Yan ◽  
Zhang Jialiang
Keyword(s):  
Atmospheric Pressure ◽  
Oxygen Plasma ◽  
Plasma Jet ◽  
Needle Electrode ◽  
Syringe Needle

Cryogenic CO Oxidation on TiO2-Supported Gold Nanoclusters Precovered with Atomic Oxygen

2003 ◽  
Vol 125 (8) ◽  
pp. 2018-2019 ◽  
Author(s):  
Tae S. Kim ◽  
James D. Stiehl ◽  
Christopher T. Reeves ◽  
Randall J. Meyer ◽  
C. Buddie Mullins
Keyword(s):  
Co Oxidation ◽  
Atomic Oxygen ◽  
Gold Nanoclusters ◽  
Supported Gold
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