STUDY OF METAL COVERAGE ON ALUMINA FROM GROUP-6 METAL-CARBONYL PRECURSORS

Authors
BAIBICH IM STEDILE FC BAUMVOL IJR DOSSANTOS JHZ SANTAROSA VE
Citation
Im. Baibich et al., STUDY OF METAL COVERAGE ON ALUMINA FROM GROUP-6 METAL-CARBONYL PRECURSORS, Physica status solidi. b, Basic research, 192(2), 1995, pp. 519-526
Citations number
31
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
192
Issue
2
Year of publication
1995
Pages
519 - 526
Database
ISI
SICI code
0370-1972(1995)192:2<519:SOMCOA>2.0.ZU;2-U
Abstract
The metal loading on alumina surfaces from group-6 metal (Cr, Mo, W) c arbonyls and their derivatives is determined by Rutherford backscatter ing spectroscopy. The subcarbonyl species are generated by photochemic al activation and monitored by Fourier transform-infrared spectroscopy . No chemical adsorption takes place for the three systems studied. Ne vertheless, in the presence of the ligand triphenylphosphine (PPh(3)) and the assistance of UV radiation, surface species chemically bonded to gamma-Al2O3 can be observed, achieving a maximum metal loading of 0 .3% in the case of Cr and 0.4% in the case of W.