Molecular views on mechanisms of Brønsted acid-catalyzed reactions in zeolites

C Chizallet, C Bouchy, K Larmier… - Chemical …, 2023 - ACS Publications
The Brønsted acidity of proton-exchanged zeolites has historically led to the most impactful
applications of these materials in heterogeneous catalysis, mainly in the fields of …

Towards a better understanding of Lewis acidic aluminium in zeolites

M Ravi, VL Sushkevich, JA van Bokhoven - Nature materials, 2020 - nature.com
Zeolites are a class of materials that are of great relevance for industrial catalysis. Several
fundamental questions relating to the structure and role of the Lewis acid sites in these …

Potential and challenges of zeolite chemistry in the catalytic conversion of biomass

T Ennaert, J Van Aelst, J Dijkmans… - Chemical Society …, 2016 - pubs.rsc.org
Increasing demand for sustainable chemicals and fuels has pushed academia and industry
to search for alternative feedstocks replacing crude oil in traditional refineries. As a result, an …

Structure–performance descriptors and the role of Lewis acidity in the methanol-to-propylene process

I Yarulina, K De Wispelaere, S Bailleul, J Goetze… - Nature …, 2018 - nature.com
The combination of well-defined acid sites, shape-selective properties and outstanding
stability places zeolites among the most practically relevant heterogeneous catalysts. The …

Distribution of Aluminum Species in Zeolite Catalysts: 27Al NMR of Framework, Partially-Coordinated Framework, and Non-Framework Moieties

K Chen, Z Gan, S Horstmeier… - Journal of the American …, 2021 - ACS Publications
The structure of aluminum-containing moieties in and within zeolite H-ZSM-5 catalysts is a
complex function of the elemental composition of the catalyst, synthesis conditions …

Solid-state NMR spectroscopy

B Reif, SE Ashbrook, L Emsley, M Hong - Nature Reviews Methods …, 2021 - nature.com
Solid-state nuclear magnetic resonance (NMR) spectroscopy is an atomic-level method to
determine the chemical structure, 3D structure and dynamics of solids and semi-solids. This …

Tuning the aluminum distribution in zeolites to increase their performance in acid‐catalyzed reactions

J Dědeček, E Tabor, S Sklenak - ChemSusChem, 2019 - Wiley Online Library
The organization of Al atoms in the framework of Si‐rich zeolites is very important and
includes two classes:(i) the Al siting that determines which individual, crystallographically …

Combined solid-state NMR, FT-IR and computational studies on layered and porous materials

G Paul, C Bisio, I Braschi, M Cossi, G Gatti… - Chemical Society …, 2018 - pubs.rsc.org
Understanding the structure–property relationship of solids is of utmost relevance for
efficient chemical processes and technological applications in industries. This contribution …

On the location of Lewis acidic aluminum in zeolite mordenite and the role of framework-associated aluminum in mediating the switch between Brønsted and Lewis …

M Ravi, VL Sushkevich, JA van Bokhoven - Chemical Science, 2021 - pubs.rsc.org
Lewis acidic aluminum in zeolites, particularly acidity that is inherent to the framework, is an
indeterminate concept. A fraction of framework aluminum changes geometry to octahedral …

Structure and dynamics of alginate gels cross-linked by polyvalent ions probed via solid state NMR spectroscopy

J Brus, M Urbanova, J Czernek, M Pavelkova… - …, 2017 - ACS Publications
Alginate gels are an outstanding biomaterial widely applicable in tissue engineering,
medicine, and pharmacy for cell transplantation, wound healing and efficient bioactive agent …