Carbon nanofiber graphitic

Electronic Components Basic Specialty Chemicals Ceramic Materials Carbon Nanofiber Graphite... 

R. Viera, C. Pham-Huu, N. Keller, and M. J. Ledoux, New carbon nanofiber/graphite felt composite for use as catalyst support for hydrazine catalytic decomposition, Chem. Commun., (2002) 954-955. 

Zhuge, J., Gou, J., Chen, R.-H., Gordon, A., Kapat, J., Hart, D., Ibeh, C., 2012a. Fire retardant evaluation of carbon nanofiber/graphite nanoplatelets nanopaper-based coating under different heat fluxes. Composites Part B Engineering 43, 3293—3305. 

Zhou, J.H., Zhang, M.G., Zhao, L., et al., 2009. Carbon nanofiber/graphite-felt composite supported Ru catalyst for hydrogenolysis of sorbitol. Catalysis Today 147, S225-S229. 

The carbon-based nanofillers are mainly layered graphite, nanotube, and nanofibers. Graphite is an allotrope of carbon, the stmcture of which consists of graphene layers stacked along the c-axis in a staggered array [1], Figure 4.1 shows the layered structure of graphite flakes. 

Steigerwalt, S.E. et al., A Pt-Ru/graphitic carbon nanofiber nanocomposite exhibiting high relative performance as a direct-methanol fuel cell anode catalyst, J. Phys. Chem. B., 105, 8097, 2001. 

CNFs carbon nanofibers GNFs graphitic nanofibers AC activated carbon... 

Fig. 7. Growth mechanism of graphitic carbon nanofibers. The illustration highlights the observation of spontaneous nickel step edge formation at the carbon-nickel interface. The observations in Reference (52) are consistent with a growth mechanism involving surface transport of carbon and nickel atoms along the graphene-nickel interface.

Abstract High-pressure hydrogenation of the single-walled carbon nanotubes, graphite nanofibers and fullerenes C60 was developed. Produced samples have been studied by their combustion, gas thermodesorption, mass-spectroscopy, X-ray, IR and Raman scattering spectroscopes. 

Yoon SH, Park CW, Yang HJ, Korai Y, Mochida I, Baker RTK, Rodriguez NM. Novel carbon nanofibers of high graphitization as anodic materials for lithium ion secondary batteries. Carbon 2004 42 21-32. 

Hydrogen-storage characteristics of samples of four types were studied as synthesized MgH2(l), MgH2 after mechanical activation, m/a (2) MgH2-graphite (3) and MgH2-carbon nanofibers (CNF) both after mechanical activation. 

During the synthesis, besides carbon nanofibers formation, a plenty of chemical transformations occurred in the catalyst incorporation of ions Fe in MgO lattice and Mg xFxO solid solution formation as well as Fe3C, y-Fe and iron-magnesium-graphite complex, being a transitional stratum between a metal particle and a carbon nanofibre formation. Were revealed inert (Mgi xFxO) and active, very fine particles of the catalyst (MgFe204) components which are involved in the process of carbon nanofibres formation. 

A test matrix of about 20 different carbon samples, including commercial carbon fibers and fiber composites, graphite nanofibers, carbon nanowebs and single walled carbon nanotubes was assembled. The sorbents were chosen to represent a large variation in surface areas and micropore volumes. Both non-porous materials, such as graphites, and microporous sorbents, such as activated carbons, were selected. Characterization via N2 adsorption at 77 K was conducted on the majority of the samples for this a Quantachrome Autosorb-1 system was used. The results of the N2 and H2 physisorption measurements are shown in Table 2. In the table CNF is used to designate carbon nanofibers, ACF is used for activated carbon fibers and AC for activated carbon. 

Avoiding carbon deposition on the catalyst is a major challenge [2, 3]. Carbon can be present as graphite-like coke and in the form of whiskers, or carbon nanofibers. The latter lead to detachment of the nickel crystallites from the support and breaking of the catalyst pellets. This may cause blockage of the reformer reactor tubes and the formation of hot spots. Higher hydrocarbons exhibit a larger tendency to form... 

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