A set of six La2-xEuxCuO4+δ samples, with x ranging from 0 to 1.33 have been analysed by EPR spectroscopy and X-ray diffractometry, to obtain information on their structure and on the change brought about by their use as catalysts for phenol oxidation with hydrogen peroxide. With increasing Eu content, a transformation of the orthorhombic structure of the La cuprate (x = 0) parent compound into two different TLa and T′Eu tetragonal structures takes place, accompanied by a change of electrical conductivity and the appearance of particular features in the EPR spectrum. The latter was a most sensitive probe for monitoring the structural modification arising during the catalytic reaction, even during the very early stages when the XRD pattern does not yet show any significant change.
|Titolo:||Electron Paramagnetic Resonance Study of La Cuprate-based Catalysts for Phenol Oxidation|
OLIVA, CESARE (Primo)
FORNI, LUCIO (Secondo)
|Settore Scientifico Disciplinare:||Settore CHIM/02 - Chimica Fisica|
|Data di pubblicazione:||1993|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1039/FT9938903727|
|Appare nelle tipologie:||01 - Articolo su periodico|