Ordering of Cu(II) Ions in Supported Copper-Titanium Oxide Catalysts
Journal of Structural Chemistry
, E-ISSN: 1573-8779
||Associate, Copper-titanium-oxide catalyst, ESR, Jahn-Teller, Ordering
Boreskov Institute of Catalysis SB RAS
Two types of ESR spectrum (A and B) of exchange-coupled Cu2+ ions have been found for Cu-Ti-O catalysts at 77 K and 300 K. In associates A and B, the Cu2+ ions form a system with orbital ordering. The difference between the spectra is due to the difference between the ground states of adjacent Cu2+ ions in the associates: the ground states are dx2 and dy2 for A type associates and dx2−y2 and dz2−x2 for B type associates. The copper associates lie on the surface of the TiO2 (anatase) support microparticles.