Simulation of Steady-State Methanol Flux through a Model Carbon Nanotube Catalyst Support

2011 ◽  
Vol 115 (39) ◽  
pp. 19158-19164 ◽  
Author(s):  
Jacob Goldsmith ◽  
Bruce J. Hinds
Keyword(s):  
Steady State ◽  
Carbon Nanotube ◽  
Catalyst Support

Durability investigation of carbon nanotube as catalyst support for proton exchange membrane fuel cell

2006 ◽  
Vol 158 (1) ◽  
pp. 154-159 ◽  
Author(s):  
Xin Wang ◽  
Wenzhen Li ◽  
Zhongwei Chen ◽  
Mahesh Waje ◽  
Yushan Yan
Keyword(s):  
Carbon Nanotube ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Catalyst Support ◽  
Proton Exchange ◽  
Exchange Membrane

Development of a Carbon Nanotube-Based Electromechanical Resonator: Device Modeling

2008 ◽  
Author(s):  
Changhong Ke
Keyword(s):  
Steady State ◽  
Carbon Nanotube ◽  
Parallel Plate ◽  
Force Sensing ◽  
Stable Steady State ◽  
Device Modeling ◽  
Complex Relationship ◽  
Novel Device ◽  
Close Form ◽  
Electromechanical Dynamics

We present an electromechanical analysis of a novel double-sided driven carbon nanotube-based electromechanical resonator. The device comprises a cantilevered carbon nanotube actuated by two parallel-plate electrodes. Close-form analytical solutions capable of predicting the steady-state resonation of the device and its resonant pull-in conditions are derived using an energy-based method. Our close-form formulas clearly reveal the complex relationship among the device geometry, the driving voltages, and the device’s electromechanical dynamics. Our theoretical modeling shows that the stable steady-state spanning range of the resonating cantilever substantially exceeds the previously reported quasi-static pull-in limit for single-sided driven cantilevered nanotube-based NEMS, while the resonant pull-in voltage is only a small fraction of the quasi-static pull-in voltage. The unique behaviors of this novel device are expected to significantly enhance the applications of electromechanical resonators in the fields of signal processing, mass and force sensing, and chemical and molecule detection.

Catalyst–support interactions and their influence in water-assisted carbon nanotube carpet growth

Carbon ◽  
2012 ◽  
Vol 50 (7) ◽  
pp. 2396-2406 ◽  
Author(s):  
Placidus B. Amama ◽  
Cary L. Pint ◽  
Francesca Mirri ◽  
Matteo Pasquali ◽  
Robert H. Hauge ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Catalyst Support

In-situ X-ray Photoelectron Spectroscopy Study of Catalyst−Support Interactions and Growth of Carbon Nanotube Forests

2008 ◽  
Vol 112 (32) ◽  
pp. 12207-12213 ◽  
Author(s):  
Cecilia Mattevi ◽  
Christoph Tobias Wirth ◽  
Stephan Hofmann ◽  
Raoul Blume ◽  
Mirco Cantoro ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Photoelectron Spectroscopy ◽  
Catalyst Support ◽  
Spectroscopy Study ◽  
X Ray ◽  
Carbon Nanotube Forests

scholarly journals Thermal characterization of carbon nanotube fibers based on steady-state electro-Raman-thermal technique

2015 ◽  
Vol 64 (12) ◽  
pp. 126501
Author(s):  
Li Man ◽  
Dai Zhi-Gao ◽  
Ying Jian-Jian ◽  
Xiao Xiang-Heng ◽  
Yue Ya-Nan
Keyword(s):  
Steady State ◽  
Carbon Nanotube ◽  
Thermal Characterization ◽  
Carbon Nanotube Fibers ◽  
Thermal Technique

scholarly journals Tribological Behavior of Novel CNTs-Based Lubricant Grease in Steady-State and Fretting Sliding Conditions

Lubricants ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 107
Author(s):  
Adolfo Senatore ◽  
Haiping Hong ◽  
Veronica D’Urso ◽  
Hammad Younes
Keyword(s):  
Steady State ◽  
Carbon Nanotube ◽  
Contact Pressure ◽  
Tribological Behavior ◽  
Frictional Coefficient ◽  
Friction Reduction ◽  
State Tests ◽  
Average Value ◽  
Mixed Regime ◽  
Mixed Lubrication Regime

The tribological behavior of novel 7.5 wt% carbon nanotube-based lubricant greases in PAO (polyalphaolefin) oil with and without 1.0 wt% MoS2, together with several other commercial greases such as calcium, lithium, were studied. The test results showed a marked reduction of frictional coefficient achieved by the CNTs based grease samples with an average benefit of around 30% compared to conventional greases. The steady state test under 1.00 GPa average contact pressure in a mixed lubrication regime and the fretting test showed the best results in terms of friction reduction obtained by CNTs greases. Steady state tests at higher average contact pressure of 1.67 GPa proved to have a lower friction coefficient for CNTs grease containing MoS2; otherwise CNTs grease without MoS2 showed an average value of CoF comparable to calcium and lithium greases, both in a boundary and a mixed regime. The protection against wear, a considerable decrease (−60%) of reference parameter was measured with CNTs grease with MoS2 (NLGI 2) in comparison with the worst conventional grease and −22% in comparison with the best conventional grease. The data indicated that our novel carbon nanotube greases show superior tribological properties and will have promising applications in the corresponding industry.

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