Abstract
NH 3 was produced by the reaction of plasma-excited nitrogen with surface OH groups on Al 2 O 3 . The surface of the Al 2 O 3 formed by the N 2 plasma treatment was different from the dehydroxylated surface (Al + + Al-O - ), which is obtained by usual thermal treatment, and may be changed to an excess oxygen phase; i.e., the formation of a novel Al 2 O 3 surface (designated by Al-O (black star)). The Al-O (black star) surface was restored by the water treatment, which was accompanied with O 2 generation. The amount of generated O 2 well correlated with the amount of ammonia produced. We proposed that an uphill reaction (N 2 + 3H 2 O → 2NH 3 + 3/2O 2 ) takes place on the Al 2 O 3 surface by means of N 2 plasma treatment followed by water treatment at room temperature.
Original language | English |
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Pages (from-to) | 351-354 |
Number of pages | 4 |
Journal | Applied Surface Science |
Volume | 121-122 |
DOIs | |
Publication status | Published - 1997 Nov |
Externally published | Yes |
Keywords
- Formation of novel Al O surface
- NH formation
- O formation
- Plasma-excited nitrogen treatment
- Uphill reaction
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films