Formation of novel Al 2 O 3 surface (Al-O(black star)) by plasma-excited nitrogen and its catalytic application - Production of ammonia and oxygen from nitrogen and water

S. Kameoka, M. Kuroda, K. Aoyagi, S. Ito, K. Kunimori

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

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 languageEnglish
Pages (from-to)351-354
Number of pages4
JournalApplied Surface Science
Volume121-122
DOIs
Publication statusPublished - 1997 Nov
Externally publishedYes

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

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