Surface modification of platinum with copper and by plasma-chemical treatment and the effect on H-Pt bond energy

Kinetics of H2 desorption from the surface of a platinum catalyst applied to silica gel, as well as from the surface of the same catalyst modified with a copper additive, is studied. Desorption of hydrogen was studied both before and after the treatment of the catalyst in the electric glow discharge of argon or oxygen or in the high-frequency H2 plasma. The H-Pt bond energy was found to increase upon the introduction of cop- per additive and decrease upon the plasma-chemical treatment of copper-platinum specimens. In the latter case, the size of metal particles increases and the microstrain in them decreases. The observed changes in H- Pt bond energy are explained by the change in the electronic state of the surface and the increase in the num- ber of metal structure defects. © Pleiades Publishing, Ltd., 2012.

Editors
-
Publisher
Maik Nauka Publishing / Springer SBM
Number of issue
2
Language
English
Pages
175-178
Status
Published
Department
-
Number
-
Volume
48
Year
2012
Organizations
  • 1 People's Friendship University of Russia, Ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
Keywords
Catalysts; Chemical modification; Desorption; Electronic states; Glow discharges; Platinum; Platinum compounds; Silica; Silica gel; Surface defects; Surface treatment; Bond energies; Desorption of hydrogen; High frequency HF; Metal particle; Metal structures; Micro-strain; Plasma chemical treatment; Platinum catalysts; Chemical bonds
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/2379/