Carbon fishbone type

Fig. 9.8. High-resolution TEM micrograph of fishbone type carbon fibre. Note the graphite lattice planes with distances in between of 0.34 nm [Courtesy J.W. Geus].

Zhu YA, Sui ZJ, Zhao TJ, Dai YC, Cheng ZM, Yuan WK. Modeling of fishbone-type carbon nanofibers a theoretical study. Carbon 2005 43 1694-9. 

Figure 53 Main types of the crystalline structure of the carbon nanofilaments produced by pyrolysis of hydrocarbons over transition metal nanoparticles coaxial cylindrical (multilayer nanotube) (A), coaxial conical (fishbone) (B), and pile (C). The nanofilaments are 10 nm in characteristic diameter. The catalyst nanoparticle behaves as a nanofilament seed.

Two types of carbon nanofibers, i.e. one having a fishbone and the other a parallel arrangement of carbon layers were tested as the supports for Pd-Pt catalysts to be used in HYD of naphthalene to tetralin at 523 K and 6MP of To measure sulfur tolerance, 0.05% of thiophene were added to the feed. The catalyst supported on the carbon nanofibers having a parallel arrangement of carbon layers was more active and more resistant to poisoning by sulfur. 

---