Synthesis and characterisation of chromium-substituted ETS-10
Literature Information
Andreas Philippou, Anabela Valente, João Rocha, Michael Anderson
A series of microporous chromium-containing ETS-10 (ETCrS-10) with different Cr/Ti molar ratios have been synthesised and characterised by energy dispersive absorption of X-rays (EDAX), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption measurements, diffuse-reflectance ultraviolet spectroscopy (DR-UV), electron paramagnetic resonance (EPR) and 29Si magic-angle-spinning nuclear magnetic resonance (MAS NMR). The diffractograms of the as-synthesised ETCrS-10 materials indicate that the ETS-10 structure has remained intact upon Cr substitution. DR-UV and EPR reveal that the as-prepared ETCrS-10 samples contain Cr3+ in octahedral coordination. The resonances in the 29Si MAS NMR spectra of ETCrS-10 are considerably broader than those of ETS-10 and such a broadening may relate to isomorphous substitution of Cr for Ti in the ETS-10 framework. The acid–base properties of ETCrS-10 materials are responsible for the high dehydrogenation activity in the conversion of isopropanol to acetone and dehydration activity in the conversion of tert-butanol to isobutene. Ethanol oxidation over ETCrS-10 yields acetaldehyde as a main product.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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