Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hydrogen dissociation catalyzed by carbon coated nickel nanoparticles:
  experiment and theory   Based on combination of experimental measurements and first-principles
calculations we report a novel carbon-based catalytic material and describe
significant acceleration of the hydrogenation of magnesium at room temperature
in presence of nickel nanoparticles wrapped in multilayer graphene. Increase of
the rate of magnesium hydrogenation in contrast to the mix of graphite and
nickel nanoparticles evidences intrinsic catalytic properties of explored
nanocomposites. Results of simulations demonstrate that the doping from metal
substrate and the presence of Stone-Wales defects turn multilayer graphene from
chemically inert to chemically active mode. The role of the size of
nanoparticles and temperature are also discussed.

29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom