Kongurova I. 3. Carbon nanotubes - carriers for oxide catalysts for CO oxidation

The catalytic systems on the base of multi-walled carbon nanotubes (CNTs), which were synthesized by means of CO disproportionation on Ni, Fe and Co oxides, with supported oxide Cu-Co-Fe system were investigated as catalysts for CO oxidation. Purify CNTs were impregnated with solution of calculated quantity Cu, Co and Fe in nitric acid. Active phase was applying by two methods: all active mass at once, or a little at a time with obligatory drying between each applying. It is shown that the availability of a phase Cu2(OH)3NO3 in samples tend to the increasing of their catalytic activity. Data of TPD are shown that the increasing of activity also correlates with the quantity of the ?2-form of СО2, which desorbed from the surface of all samples. It is determined, that when the CNTs samples are opened using HNO3, surface carboxylic groups are present and interact with active phase. Such homogenous plating of Cu2(OH)3NO3 small crystals was obtained in the case of active samples which consists of CNTs, whichwere synthesized on Co2О3 with single applying of active phase. The sample, which consists of CNTs, which were synthesized on NiO, with (10+10)% mass. of active catalytic phase, completely converts CO into СО2 at 470С. It is shown, that this catalyst have very fine-dispersed particles of active phase, encapsulated inside CNTs. Kinetics of CO oxidation on catalysts is investigated and it is shown, that the kinetic experimental data are submitted to the Eley-Readil mechanism.