Au-197 Mossbauer study of nano-sized gold catalysts supported on Mg(OH)(2)and TiO2

Citation
Y. Kobayashi et al., Au-197 Mossbauer study of nano-sized gold catalysts supported on Mg(OH)(2)and TiO2, HYPER INTER, 126(1-4), 2000, pp. 95-99
Citations number
8
Categorie Soggetti
Physics
Journal title
HYPERFINE INTERACTIONS
ISSN journal
03043843 → ACNP
Volume
126
Issue
1-4
Year of publication
2000
Pages
95 - 99
Database
ISI
SICI code
0304-3843(2000)126:1-4<95:AMSONG>2.0.ZU;2-N
Abstract
We have studied nano-sized Au catalysts supported on Mg(OH)(2) and TiO2 usi ng Au-197 Mossbauer spectroscopy. Au-197 Mossbauer spectra observed for Au/ Mg(OH)(2) catalysts can be decomposed into one singlet with zero isomer shi ft and several doublets. One of the doublets shows an isomer shift that is typical for Au-I, and other doublets are due to Au-III. The relative area o f the Au-I component shows the maximum value for a specimen calcined at 523 K, which also shows the highest catalytic activity.