Effect of plasmochemical treatment of platinum catalyst on dispersity of metal phase and its catalytic activity

We studied how treatment of 0.64 wt % Pt/SiO2 catalyst with a glow-discharge plasma in O2 and a high-frequency plasma in H 2 (HF H2) influences the cyclohexane dehydrogenation reaction. The effect of plasmochemical treatment on the average diameter of platinum particles was established by the method of X-ray diffraction analysis. It was found that oxygen plasma increases the surface area of the metal by ∼15% and diminishes activity by raising the activation energy and reducing the number of active centers per unit surface of the metal. The HF H2 plasma increases the reaction rate constant many times over, due to the number of active centers per unit surface of the metal rising sharply while the size of the Pt particles remains unchanged. © Pleiades Publishing, Ltd., 2010.

Editors
-
Publisher
-
Number of issue
2
Language
English
Pages
338-340
Status
Published
Department
-
Number
-
Volume
84
Year
2010
Organizations
  • 1 People's Friendship University, Moscow, 117198, Russian Federation
Keywords
Average diameter; Catalytic activity; Cyclohexane dehydrogenation; Dispersity; Glow discharge plasmas; High frequency HF; Metal phase; Number of active centers; Oxygen plasmas; Per unit; Platinum catalysts; Platinum particles; Pt particle; Surface area; Activation energy; Catalysts; Dehydrogenation; Metals; Oxygen; Plasmas; Platinum; Rate constants; X ray diffraction; X ray diffraction analysis; Electric discharges
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/2810/