ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
2 files

Synthesis and In-Depth Characterization of Ga-Based Structured Catalysts: Enhancing Glycerol Conversion

preprint
submitted on 06.07.2020, 08:10 and posted on 07.07.2020, 13:04 by Alvise Vivian, Loraine Soumoy, Luca Fusaro, Pierre Louette, Alexandre Felten, Sonia Fiorilli, Damien Debecker, Carmela Aprile
Mesoporous Ga-silicates were efficiently prepared using a sustainable and continuous synthesis procedure. Three different Si/Ga ratios of 34, 74 and 148. The insertion of Ga predominantly as single site in tetrahedral coordination in the silica framework was elucidated by XPS, using the Auger parameter of Ga in a Wagner plot representation. The speciation of Ga was further clarified using solid state 71Ga NMR spectroscopy, confirming the formation of mainly isolated Ga species. Consistently, the aerosol-made Ga-silicates displayed outstanding turnover frequencies (up to 677 h-1) and selectivity, markedly outcompeting other reference metallosilicate catalysts reported in literature. Moreover, the most active catalyst was successfully reused in multiple catalytic cycles thus proving its stability under the selected reaction conditions.

Funding

Communauté française de Belgique: ARC programme (15/20-069)

FNRS-EQP-U.N034.17F

History

Email Address of Submitting Author

carmela.aprile@unamur.be

Institution

University of Namur

Country

Belgium

ORCID For Submitting Author

0000-0002-3193-3239

Declaration of Conflict of Interest

no conflict of interest

Exports

Logo branding

Exports