REDUCTION OF NICKEL-OXIDE ON ALPHA-ALUMINA - COALESCENCE OF NICKEL TOMETALLIC CRYSTALLITES

Authors
TWIGG MV RICHARDSON JT
Citation
Mv. Twigg et Jt. Richardson, REDUCTION OF NICKEL-OXIDE ON ALPHA-ALUMINA - COALESCENCE OF NICKEL TOMETALLIC CRYSTALLITES, Catalysis letters, 20(3-4), 1993, pp. 299-303
Citations number
9
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
20
Issue
3-4
Year of publication
1993
Pages
299 - 303
Database
ISI
SICI code
1011-372X(1993)20:3-4<299:RONOA->2.0.ZU;2-6
Abstract
Reduction of alpha-alumina-supported nickel oxide was studied with hyd rogen consumption, magnetization and XRD measurements. Rupture of Ni-O bonds at 270-350-degrees-C is much faster than nucleation of metallic nickel and precedes growth into crystallites. Water vapor and low hyd rogen flows retard both processes. At higher temperatures, growth is m ore rapid than Ni-O bond rupture.