Several experiments were performed to provide convincing evidence for low temperature gallium reduction in a Ga2O3/HZSM-5 catalyst. XPS measurements showed the appearance of a GaI signal after in situhydrogen reduction at temperatures ranging between 373 and 673 K. No transfer of reduced gallium species from Ga2O3 to the zeolite particles was detected. A revision of the existing reduction mechanism is thus proposed. It is suggested here that the actual role of the HZSM-5 zeolite could be to provide a kind of activated hydrogen able to reduce Ga2O3.
|Titolo:||Low temperature reduction of gallium in a Ga2O3/HZSM-5 catalyst|
BIANCHI, CLAUDIA LETIZIA MADDALENA (Secondo)
|Settore Scientifico Disciplinare:||Settore CHIM/04 - Chimica Industriale|
|Data di pubblicazione:||1993|
|Digital Object Identifier (DOI):||10.1016/0304-5102(93)87046-B|
|Appare nelle tipologie:||01 - Articolo su periodico|