Effect of oxygen adsorption on the electrical conductivity of semiconducting nickel–iron oxide catalyst with spinel structure

Resumo

Nickel–iron oxide catalyst semiconductor with spinel structure is synthesized from oxalates. Oxygen adsorption and its effect on the catalyst’s electrical conductivity in the temperature range of 353–693 K and the ferromagnetic state are studied. The presence of durable and reversible form of adsorbed oxygen is detected. It is established that the resistivity of samples and their activation energy depend on the type of adsorption and the temperature. Strongly adsorbed atomic oxygen is charged negatively and can participate in the reaction of oxidative dehydrogenation of butene-1.