Anion intercalated graphite: a combined electrochemical and tribological investigation by in situ AFM

2020 ◽  
Vol 280 (3) ◽  
pp. 222-228
Author(s):  
G. BUSSETTI ◽  
M. CAMPIONE ◽  
A. BOSSI ◽  
R. YIVLIALIN ◽  
L. DUÒ ◽  
...  
Keyword(s):  
Intercalated Graphite

57Fe Mössbauer Spectroscopic Study of the Geometrical Effects In the Catalytic Reactions with Intercalation Compounds

1982 ◽  
Vol 20 ◽  
Author(s):  
P.P. Vaishnava ◽  
P.A. Montano
Keyword(s):  
Ferric Chloride ◽  
Catalytic Reactions ◽  
Fischer Tropsch ◽  
Reaction Conditions ◽  
Intercalated Graphite ◽  
The Third ◽  
Intercalated Compounds ◽  
Catalytic Sites ◽  
Geometrical Effects

ABSTRACTIn situ 57Fe Mössbauer spectra are reported for the first-, higher-stage ferric chloride, and a mixed ferric chloride-potassium chloride intercalated graphite catalysts under reduction and Fischer-Tropsch reaction conditions. The mass spectroscopic measurements reveal a different catalytic selectivity for the three catalysts. The first two catalysts predominantly possess a higher selectivity for methane, whereas the third catalyst has higher selectivity for the formation of propane. The differences are attributed to geometrical effects in the catalytic sites of the intercalated compounds.

A Study of the Electrical and Mechanical Properties of Alkali Metal Intercalated Graphite Fibers

1982 ◽  
Vol 20 ◽  
Author(s):  
D.D. Dominguez ◽  
J.L. Lakshmanan ◽  
E.F. Barbano ◽  
J.S. Murday
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Alkali Metal ◽  
Alkali Metals ◽  
Vapor Transport ◽  
Intercalated Graphite ◽  
Graphite Fibers ◽  
Transport Method ◽  
Vapor Transport Method

ABSTRACTIndividual graphite fibers (TP 4104B and GY-70) were intercalated with alkali metals using the two-zone vapor transport method commonly used to prepare alkali metal intercalated graphite. The progress of the reaction was followed in situ by measuring the electrical resistances of the fibers as the temperature difference (ΔT) between the fiber and the metal was decreased stepwise. These measurements showed that the ease and extent of intercalation are related to fiber graphitization. Without exposure to air, the temperature dependence of the resistances of the intercalated fibers were also measured from −196°C to 400°C. The measurements showed that the intercalated fibers have a metallic dependence on temperature. Tensile strength measurements on the intercalated fibers showed that intercalation of the heavy alkali metals is deleterious.

Synthesis of Polyaniline/Poly(Vinyl Alcohol) Intercalated Graphite Oxide Composites

2011 ◽  
Vol 343-344 ◽  
pp. 11-15
Author(s):  
Fan Hu ◽  
Zu Xun Xu ◽  
Bing Hai Dong ◽  
Li Wan ◽  
Xiu Hua Zhang ◽  
...  
Keyword(s):  
Graphite Oxide ◽  
Vinyl Alcohol ◽  
In Situ Polymerization ◽  
Transport Processes ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
Intercalated Graphite ◽  
Diffusion Controlled ◽  
Oxide Composites

The Polyaniline-poly(vinyl alcohol)-intercalated graphite oxide (GO) composites were synthesized through in-situ polymerization methods. The characterizations were illuminated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry(CV) and thermal analysis(TGA), respectively. TGA shows that composites have stable thermal properties. CV curves show charge-transport processes within the film are diffusion-controlled. The new composites reveal the potential application in the future.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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