1. Dependence of the catalytic activity of palladium-ruthenium alloys on their composition and conditions of heat treatment
- Author
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Vladimir M. Gryaznov, B. Dzhuntini, V. I. Kaluga, V. I. Shimulis, V. V. Kornilov, E. V. Khrapova, and N. R. Roshan
- Subjects
Arrhenius equation ,Thermodynamics ,chemistry.chemical_element ,General Chemistry ,Activation energy ,Catalysis ,Ruthenium ,Atmosphere ,symbols.namesake ,Repeated treatment ,chemistry ,symbols ,Composition (visual arts) ,Palladium - Abstract
1. The catalytic activity of binary alloys of palladium containing 4.4–9.2% Ru was investigated as a function of' the conditions of their heat treatment in an atmosphere of various gases (air, H2, Ar). 2. The results of the investigation were treated according to a program permitting calculation of the parameters of the Arrhenius equation on the assumption of normal and logarithmic-normal distributions of their values. The correctness of the hypothesis of a logarithmic-normal distribution was demonstrated. 3. Raising the temperature of treatment of the alloys in a stream of air from 350 to 750°, as well as repeated treatment in a stream of air at 750°, caused an appreciable increase in the catalytic activity, associated with an increase in the preexponential factors. An even greater increase in the activity, due to a decrease in the activation energy, is also achieved as a result of treatment of the catalyst with air, and then with H2, at 750° with rapid cooling in H2.
- Published
- 1973