II International Symposium on Carbon for Catalysis ABSTRACTS

PP-I-37
ON THE OBTAINING OF CARBONACEOUS MATERIALS DOPED
BY NICKEL COMPOUNDS
Shornikova O.N., Sorokina N.E., Avdeev V.V.
Chemistry Department, Lomonosov Moscow State University, Moscow, Russia
e-mail: shoolga@yandex.ru
Due to the graphite layered structure, different atoms, molecules and ions are able to
intercalate into the space between graphite layers in order to form graphite intercalation
compounds (GIC). GIC with transition metal chlorides (NiCl 2 , CoCl 2 , PdCl 2 , PtCl 2 ) are the
interesting class of inorganic compounds thanks to interesting magnetic properties [1]. The
compounds obtained by reduction of GIC-MeCl 2 to GIC with metals or their oxides catalyze
oxidation reactions of organic compounds [2], these metals without graphite do not show
catalytic ability. That is why the purpose of the present work was obtaining of carbonaceous
materials doped by nickel compounds with the use of graphite electrochemical oxidation in
aqueous solution of nickel nitrate followed by thermal treatment.
The samples were synthesized by anodic oxidation of natural graphite (average size
200 μm, d 0 = 3.35Å) under chronopotentiometric mode (I = 30 mA) in the three-electrode
cell. The potentials were measured with the use of Ag/AgCl reference electrode. Aqueous
solutions of Ni(NO 3 ) 2·6H 2 O were used as electrolyte. Charging curves of graphite sample are
smooth in all cases. The potential of graphite electrode increases at first minutes of synthesis.
Further polarization is accompanied by insignificant change of potential, the potential value is
about 1.5 – 3.2 V for different Ni(NO 3 ) 2 concentration. The synthesis conditions and some
characteristics of carbonaceous materials are listed in the table 1.
Table 1. The properties of carbonaceous materials.
C Ni(NO3)2 , % Q, A·s/g d i , Å d 250 EG, g/l d 900 EG, g/l ωNiO, %
100 3.37 33 3 10
52 500 3.36 6 1 20
1500 3.36 1 2 45
100 3.35 34 3 0.8
5.2
500 3.36 17 0.6 1
1500 3.36 14 1.4 0.6
100 3.37 62 18 2.2
0.52
500 3.38 56 5 5
1500 3.37 43 4 7
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