Graphite interaction

In general, encapsulated metal particles were observed on all graphite-supported catalysts. According to Ref. [4] it can be the result of a rather weak metal-graphite interaction. We mention the existence of two types of encapsulated metal particles those enclosed in filaments (Fig. 1) and those encapsulated by graphite. It is interesting to note that graphite layers were parallel to the surface of the encapsulated particles. 

Explain the fact that benzene adopts a herringbone packing motif (Figure 1.20), whereas higher aromatic hydrocarbons possess y-type or graphitic interactions. 

Understanding the mechanism for H2 formation from H atoms in space is an old and important problem in astrophysics. It is generally accepted that H atom recombination takes place on interstellar dust particles [105]. The exact composition of these dust particles is not known, but there is spectroscopic evidence that they contain graphitic components, and this has stimulated several electronic structure studies of the H-graphite interaction [86, 89, 106-109]. The recent DFT studies of Sidis and co-workers [108, 109] and Sha and Jackson [89], who modeled graphite as a coronene molecule and a slab, respectively, are in general agreement. We review the results of these studies in Section 3.1. 

Figure 14 Potential energy curves for the H-graphite interaction for three cases physisorption on a rigid lattice (dotted line, filled squares), chemisorption where the lattice is allowed to relax (solid line, open circles), and chemisorption where the bonding carbon is fixed in the puckered position (dashed line, filled circles). The symbols correspond to the DFT calculations, and the lines correspond to the model PES. Taken from Ref. [90],...

Al-Jishi R, Dresselhaus G (1994) Lattice-denamical model for alkali-metal-graphite interaction compounds. Phys Rev B 26(8) 4523 538... 

Pertsin, A. and Grunze, M. (2004). Water-graphite interaction and behavior of water near the graphite surface. J. Phys. Chem. B, 108, 1357-64. 

Due to this largely graphitic character, the faceted carbon nanoparticles are more stable than their spherical analogs. In the latter, the graphitic interaction between layers is much less pronounced due to the multitude of defects and the random arrangement of shells. In the parallel domains of the nanoparticles, on the other... 

Several N2-N2 intermolecular potentials were examined with respect to their herringbone transition temperature under otherwise identical conditions based on canonical Monte Carlo simulations with 900 classical N2 molecules [217]. The simulations were performed in strictly two dimensions and the centers of mass were fixed on a triangular lattice. No finite-size extrapolations whatsoever were performed so that the transition temperatures obtained from the heat capacity maxima are only of a qualitative nature. The N2-graphite interaction was modeled by the first-order Fourier expansion technique [324, 326, 327] and is included only for the realistic atom-atom... 

The separation of the N2-graphite interaction into a laterally averaged term and corrugation amplitude... 

Yb) were synthesized and under definite conditions, compounds with iron were obtained. Graphite acts as a donor of electrons when it interacts with halogens, and intercalation compounds with Br2, ICl, IBr molecules are easily formed, while the compound with CI2 is extremely unstable. At low temperatures (15-100°C), graphite interacts with fluorine with the help of catalysts (HF, AgF). This fluorination results in the formation of graphite... 

Technical viability requires understanding of basic phenomenology (material behavior under irradiation, salt-graphite interactions, etc.) and development of key technologies so that an integrated demonstration test can be constructed with high confidence of success. This requires a variety of analysis studies, laboratory research, and supporting experimental test facilities. Some of the R D requirements that have been identified include... 

Evidence of lack of salt-graphite interaction from the post-irradiation examination of the MSRE (ORNL/TM-4174). A 1400°C experiment was also conducted which showed salt-graphite compatibility (ORNL-4344 p112). 

Jenness, G. R., Jordan, K. D. (2009). Df-dft-sapt investigation of the interaction of a water molecule to coronene and dodecabenzo-coronene Implications for the water-graphite interaction. Journal of Physical Chemistry C, 113, 10242-10248. 

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