| Autor: |
Shabunya, Stanislav I., Minkina, Valentina G., Kalinin, Vladimir I., Martynenko, Vladimir V. |
| Zdroj: |
Reaction Kinetics, Mechanisms and Catalysis; 20230101, Issue: Preprints p1-19, 19p |
| Abstrakt: |
The article presents the results of experiments of the hydrolysis process with a Co/TiO2catalyst and homogeneous experiments in an aqueous solution of sodium borohydride (NaBH4) aimed to the test the developed model of heterogeneous processes. In data processing of catalytic experiments, we use the method of their correction to exclude the rate of homogeneous hydrolysis. We consider the adsorption/desorption model, in which two types of particles can be adsorbed, i.e. water molecules and BH4−·H+complexes. As a result of the analysis of possible irreversible heterogeneous reactions and the experimental dependences of the hydrogen generation rates, it is concluded that the main hydrolysis reaction on the Co/TiO2catalyst occurs upon collisions of BH4−ion from the solution with adsorbed water molecules. We observed the growth of the specific rate of hydrogen generation with an increase in the degree of NaBH4decomposition in all experiments with this catalyst. Two hypotheses have been suggested to explain this effect. |
| Databáze: |
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