Understanding the Air Stability of Defective MoS2 and the Oxidation Effect on the Surface HER Activity

2021 ◽  
Author(s):  
Wenyu Zhou ◽  
Lichun Dong ◽  
Luxi Tan ◽  
Qing Tang
Keyword(s):  
Oxidation Effect

scholarly journals A Mechanism of Anti-Oxidation Coating Design Based on Inhibition Effect of Interface Layer on Ions Diffusion within Oxide Scale

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 454
Author(s):  
Bo Yu ◽  
Ya Liu ◽  
Lianqi Wei ◽  
Xiaomeng Zhang ◽  
Yingchao Du ◽  
...  
Keyword(s):  
Oxide Scale ◽  
Energy Barrier ◽  
Tetrahedral Site ◽  
Interface Layer ◽  
Diffusion Behavior ◽  
Mullite Phase ◽  
Inhibition Effect ◽  
Coating Design ◽  
Oxidation Effect ◽  
Dynamics Method

In this paper, a mechanism of anti-oxidation coating design based on the inhibition effect of the interface layer on the diffusion of ions within oxide scale was introduced. The Fe2+ ions diffusion behavior in Fe3O4, Cr2FeO4, and FeAl2O4 were studied by molecular dynamics method of Nudged elastic bond. As the result shown, Fe2+ ions tended to diffuse through the vacancy at tetrahedral site in Cr2FeO4 and FeAl2O4, but diffuse through the octahedral vacancy in Fe3O4. When temperature ranged from 1073 to 1325 K, the energy barrier of Fe2+ ions diffusion in Cr2FeO4 was higher than that of FeAl2O4, and both of that were still obvious higher than that in Fe3O4. A new anti-oxidation coating was prepared based on the inhibition of interface layer consisted of FeAl2O4 to protect the carbon steel S235JR at 1200 °C for 2 h. The FeAl2O4 region was formed and observed at the interface between coating and Fe element diffusion area, and the mullite phase was distributed outside of the FeAl2O4 region. Comparing to the bare sample, the prepared coating exhibited an excellent anti-oxidation effect.

BCNO QDs and ROS synergistic oxidation effect on fluorescence enhancement sensing of tetracycline

2021 ◽  
Vol 332 ◽  
pp. 129530
Author(s):  
Zhengtao Wu ◽  
Youbin Zhou ◽  
Huiying Huang ◽  
Zhuen Su ◽  
Shiming Chen ◽  
...  
Keyword(s):  
Fluorescence Enhancement ◽  
Oxidation Effect

Oxidation Effect in Cobalt Nanoparticles Magnetic Fluids

2009 ◽  
Vol 45 (6) ◽  
pp. 2464-2466 ◽  
Author(s):  
Jong Soo Hong ◽  
J. Pyun ◽  
Yong Wook Park ◽  
Chul Sung Kim ◽  
In-Bo Shim
Keyword(s):  
Magnetic Fluids ◽  
Cobalt Nanoparticles ◽  
Oxidation Effect

A Novel Wireless Thermal Convection Type Angular Accelerometer Integrated with an Active RFID-Tag

2013 ◽  
Vol 284-287 ◽  
pp. 2005-2008 ◽  
Author(s):  
Jium Ming Lin ◽  
Kuo Hsiung Cho ◽  
Cheng Hung Lin ◽  
Hung Han Lu
Keyword(s):  
Thermal Convection ◽  
Response Times ◽  
Flexible Substrate ◽  
Wireless Sensor ◽  
Rfid Tag ◽  
Active Rfid ◽  
Angular Accelerometer ◽  
Innovative Idea ◽  
Carbon Dioxide Co2 ◽  
Oxidation Effect

Five novel ideas are proposed in this paper to integrate an active RFID tag with thermal convection angular accelerometer on a flexible substrate, thus the device is a wireless sensor. The first innovative idea is that this device is without any movable parts, so it is very reliable. The second new idea is that it is made on a flexible substrate, such as plastic or polyimide, thus it can save more power. The third new idea is that the xenon gas is applied in the chamber to conduct the heat instead of the traditional Carbon dioxide. CO2 can produce oxidation effect to the heater and thermal sensors, while the xenon not. The fourth new idea is to apply a hemi-spherical chamber; it is more streamline in nature with less drag effect to ease the fluid flow and yield quicker response. The fifth new idea and the most powerful one is that the angular accelerometer is integrated with an active RFID tag on the same flexible substrate, thus the device becomes a more useful wireless sensor. Note the linearity, sensitivity, and response times of step-input angular accelerations are better for the hemi-spherical chamber filled with Xe gas. The sensitivity is 71.4°C/(rad/s2) and the response time is 60μs.

Mesoporous CuO/TiO2 catalysts prepared by the ammonia driven deposition precipitation method for CO preferential oxidation: Effect of metal loading

Fuel ◽  
2021 ◽  
pp. 122491
Author(s):  
Aggeliki Papavasiliou ◽  
Tim Van Everbroeck ◽  
Cataldo Blonda ◽  
Benedetta Oliani ◽  
Elias Sakellis ◽  
...  
Keyword(s):  
Precipitation Method ◽  
Preferential Oxidation ◽  
Metal Loading ◽  
Co Preferential Oxidation ◽  
Oxidation Effect
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