TY - JOUR
T1 - Redox chemistry of molybdena-silica catalysts
T2 - 1. Characterization and thermal reduction
AU - SEYEDMONIR, S R
AU - Howe, Russell Francis
PY - 1988/4
Y1 - 1988/4
N2 - Molybdena-silica catalysts have been characterized spectroscopically and their thermal reduction in H2 studied by spectroscopic and volumetric measurements. Infrared spectroscopy complements other techniques in identifying MoO3 and surface polymolybdate phases in the calcined catalysts. The polymolybdate phase is readily hydrolyzed on exposure to water vapour. Initial hydrogen reduction occurs at 400 °C in the polymolybdate phase, producing Mo5+ and uncovering the silica support. At 500 °C, terminal oxide vacancies are formed in both polymolybdate and MoO3 phases.
AB - Molybdena-silica catalysts have been characterized spectroscopically and their thermal reduction in H2 studied by spectroscopic and volumetric measurements. Infrared spectroscopy complements other techniques in identifying MoO3 and surface polymolybdate phases in the calcined catalysts. The polymolybdate phase is readily hydrolyzed on exposure to water vapour. Initial hydrogen reduction occurs at 400 °C in the polymolybdate phase, producing Mo5+ and uncovering the silica support. At 500 °C, terminal oxide vacancies are formed in both polymolybdate and MoO3 phases.
U2 - 10.1016/0021-9517(88)90314-4
DO - 10.1016/0021-9517(88)90314-4
M3 - Article
SN - 0021-9517
VL - 110
SP - 216
EP - 228
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 2
ER -