Tuning the Molecular Structure and Reaction Mechanism of Olefin Metathesis by Model Bilayered Supported MoOx/AlOx/SiO2 Catalysts

Ream, Eli M.; Thompson, Joseph I.; Setiawan, Adhika; Rangarajan, Srinivas; Wachs, Israel E.

doi:10.1021/acscatal.5c01854

Title: Tuning the Molecular Structure and Reaction Mechanism of Olefin Metathesis by Model Bilayered Supported MoO_x/AlO_x/SiO₂ Catalysts

Journal Article · Fri Jun 27 00:00:00 UTC 2025 · ACS Catalysis

DOI: https://doi.org/10.1021/acscatal.5c01854 · OSTI ID:2572515

^[1]; Thompson, Joseph I. ^[1];

^[1];

^[1]

Lehigh University, Bethlehem, PA (United States)

The molecular structure and activity of supported MoO_x olefin metathesis catalysts are heavily impacted by the choice of catalyst support. In this study, surface modification of the SiO₂ support with AlO_x and selective anchoring of the MoO_x on the surface AlO_x sites were used to tune the structure, activation, and reactivity of the resulting surface MoO_x sites. Extensive in situ molecular characterization, chemical probe studies, and density functional theory (DFT) calculations reveal that the enhanced activity of the supported MoO_x/AlO_x/SiO₂ catalyst over the MoO_x/ SiO₂ catalyst is associated with more favorable activation and kinetics of surface MoO_x anchored at AlO_x sites.

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Research Organization:: Lehigh University, Bethlehem, PA (United States)

Sponsoring Organization:: U.S. National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-93ER14350

OSTI ID:: 2572515

Journal Information:: ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 14 Vol. 15; ISSN 2155-5435

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Tuning the Molecular Structure and Reaction Mechanism of Olefin Metathesis by Model Bilayered Supported MoOx/AlOx/SiO2 Catalysts

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Title: Tuning the Molecular Structure and Reaction Mechanism of Olefin Metathesis by Model Bilayered Supported MoO_x/AlO_x/SiO₂ Catalysts