Study of the reducibility of Pt or Pd on ceria-zirconia catalysts by XANESmeasured at the Ce L-III edge and magnetic susceptibility measurements

Authors
Norman, A Perrichon, V Bensaddik, A Lemaux, S Bitter, H Koningsberger, D
Citation
A. Norman et al., Study of the reducibility of Pt or Pd on ceria-zirconia catalysts by XANESmeasured at the Ce L-III edge and magnetic susceptibility measurements, TOP CATAL, 16(1-4), 2001, pp. 363-368
Citations number
29
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
TOPICS IN CATALYSIS
ISSN journal
10225528 → ACNP
Volume
16
Issue
1-4
Year of publication
2001
Pages
363 - 368
Database
ISI
SICI code
1022-5528(2001)16:1-4<363:SOTROP>2.0.ZU;2-6
Abstract
The reduction behaviour of CexZr1-xO2 and Pt or Pd supported on CexZr1-xO2 was investigated by means of XANES measured at the Ce L-III edge and magnet ic susceptibility measurements. Both techniques agree quite closely for the materials studied. The presence of a noble metal greatly improves the redu ction of the CexZr1-xO2 support at low temperatures. The reoxidation that o ccurred after evacuation of the reduced solids and heating to 500 degreesC suggests that it is linked to a reversible surface reduction process of the sample.