Tailoring titanium species to boost bifunctional Au-TS-1 catalyzing propylene hydro-oxidation

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2025-03-18 DOI:10.1002/aic.18820

Yujie Liao, Zhihua Zhang, Yueqiang Cao, Shudong Shi, Daiyi Yu, Xuezhi Duan, Xinggui Zhou

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引用次数: 0

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 Ti⁴⁺ to extra-framework anatase TiO₂. In contrast, thermal treatment under an inert nitrogen atmosphere at lower temperatures effectively mitigates this transformation, resulting in a reduced amount of extra-framework TiO₂. This optimization leads to enhanced utilization of H₂O₂ and decreased isomerization conversion of propylene oxide, ultimately boosts bifunctional Au-TS-1 catalyzing propylene hydro-oxidation.

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.