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.
Low temperature reduction of gallium in a Ga2O3/HZSM-5 catalyst / R. Carli, C.L. bianchi, R. Giannantonio, V. Ragaini. - In: JOURNAL OF MOLECULAR CATALYSIS. - ISSN 0304-5102. - 83:3(1993), pp. 379-389.
Low temperature reduction of gallium in a Ga2O3/HZSM-5 catalyst
C.L. bianchiSecondo
;
1993
Abstract
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.
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