135714 20240614091947.0 doi 10.1021/acssuschemeng.0c08953 sideral 126486 ART-2021-126486 eng Sorribes, I. Unraveling a Biomass-Derived Multiphase Catalyst for the Dehydrogenative Coupling of Silanes with Alcohols under Aerobic Conditions 2021 Herein, a novel silver and chromium nanostructured N-doped carbonaceous material has been synthesized by a biomass-annealing approach using readily available chitosan as a raw material. The resulting catalyst AgCr@CN-800 has been applied for the dehydrogenative coupling reaction of various silanes with different alcohols to obtain the corresponding silyl ethers under aerobic and mild conditions. Besides excellent activity and selectivity, the as-prepared catalyst exhibits good stability and reusability. Characterization by X-ray diffraction, X-ray photo-electron spectroscopy, inductively coupled plasma mass spectrometry, and high-resolution transmission electron microscopy (TEM) in combination with careful examination of the structure with Cs-corrected high-angle annular dark-field scanning TEM revealed that the catalyst AgCr@CN-800 comprises Ag- and CrN-aggregated particles, as well as highly dispersed Ag-N-x and Cr-N-x sites embedded in N-doped graphitic structures. A comparative catalytic study using structure-related catalysts in combination with acid-leaching treatments has shown that the most active species are the Ag particles and that their activity is boosted by the presence of Cr-derived species. By in situ Raman spectroscopy experiments, it has been found that the dehydrogenative coupling of silanes with alcohols in the presence of catalyst AgCr@CN-800 takes place through an oxygen-assisted mechanism. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/E31-17R info:eu-repo/grantAgreement/ES/MICIU/PGC2018-094417-B-I00 info:eu-repo/grantAgreement/ES/MICIU/RTI2018-098237-B-C22 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 9.224 2021 ENGINEERING, CHEMICAL 13 / 142 = 0.092 2021 Q1 T1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 10 / 47 = 0.213 2021 Q1 T1 CHEMISTRY, MULTIDISCIPLINARY 29 / 179 = 0.162 2021 Q1 T1 1.743 2021 Chemical Engineering (miscellaneous) 2021 Q1 Renewable Energy, Sustainability and the Environment 2021 Q1 Chemistry (miscellaneous) 2021 Q1 14.5 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Ventura-Espinosa, D. Assis, M. Martin, S. Universidad de Zaragoza (orcid)0000-0001-9193-3874 Concepcion, P. Bettini, J. Longo, E. Mata, J.A. Andres, J. 2012 755 Universidad de Zaragoza Dpto. Química Física Área Química Física 9, 7 (2021), 2912-2928 ACS sustain. chem. & eng. ACS Sustainable Chemistry and Engineering 2168-0485 1313746 http://zaguan.unizar.es/record/135714/files/texto_completo.pdf Postprint 1018958 http://zaguan.unizar.es/record/135714/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:135714 articulos driver 2024-06-14-08:58:24 ARTICLE