- Tytuł:
- Negatively and Positively Polarized Hydrogen Adspecies on Thin Platinum Films
- Autorzy:
-
Nowicka, L.
Wolfram, Z.
Duś, R. - Powiązania:
- https://bibliotekanauki.pl/articles/1892305.pdf
- Data publikacji:
- 1992-01
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
82.65.-i
73.60.Aq - Opis:
- Hydrogen adsorption on thin platinum films under isothermal conditions within the temperature and pressure intervals 78-298 K and 10$\text{}^{-10}$-10$\text{}^{-2}$ Torr has been studied measuring simultaneously surface potential (SP) and pressure (P), by means of a sensitive, short response time apparatus. Two forms of hydrogen deposit of different electrical character have been distinguished. The first one arising at the beginning of adsorption decreases the surface potential, the second one following it increases the SP due to positively polarized adspecies formation. This positively polarized form is inhomogeneous as concerns binding energy. Hydrogen uptake associated with the decrease of SP becomes larger with increase of temperature. It seems that this β¯ form of the adsorbate stabilizes the positively polarized adspecies on the surface.
- Źródło:
-
Acta Physica Polonica A; 1992, 81, 1; 117-124
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł