Premium
Tailoring titanium species to boost bifunctional Au‐ TS ‐1 catalyzing propylene hydro‐oxidation
Author(s) -
Liao Yujie,
Zhang Zhihua,
Cao Yueqiang,
Shi Shudong,
Yu Daiyi,
Duan Xuezhi,
Zhou Xinggui
Publication year - 2025
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.18820
Subject(s) - bifunctional , titanium , chemistry , chemical engineering , organic chemistry , catalysis , engineering
Abstract The speciation of titanium is a crucial factor that influences the catalytic activity of TS‐1, an efficient catalyst for selective oxidations. This study investigates how different thermal treatment conditions affect titanium speciation in TS‐1. A variety of characterization techniques were employed to identify changes in the titanium speciation, while propylene hydro‐oxidation served as a probe reaction to assess the impact of these changes on the synergistic interaction between TS‐1 and Au nanoparticles. Our findings reveal that conventional thermal calcination induces a transformation of some titanium species from tetrahedral coordination Ti 4+ to extra‐framework anatase TiO 2 . In contrast, thermal treatment under an inert nitrogen atmosphere at lower temperatures effectively mitigates this transformation, resulting in a reduced amount of extra‐framework TiO 2 . This optimization leads to enhanced utilization of H 2 O 2 and decreased isomerization conversion of propylene oxide, ultimately boosts bifunctional Au‐TS‐1 catalyzing propylene hydro‐oxidation.