9 results match your criteria: "Centre for Surface Chemistry and Catalysis-Characterization and Application Team (COK-KAT)[Affiliation]"
Mater Horiz
September 2024
Center for Surface Chemistry and Catalysis - Characterization and Application Team (COK-KAT), KU Leuven, 3001 Leuven, Belgium.
Correction for 'Performance of ferrite nanoparticles in inductive heating swing adsorption (IHSA): how tailoring material properties can circumvent the design limitations of a system' by Maxim De Belder , , 2024, , 4144-4149, https://doi.org/10.1039/d4mh00377b.
View Article and Find Full Text PDFMolecules
July 2024
Centre for Surface Chemistry and Catalysis-Characterization and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200F-Box 2461, 3001 Leuven, Belgium.
This perspective outlines recent developments in the field of NMR spectroscopy, enabling new opportunities for in situ studies on bulk and confined clathrate hydrates. These hydrates are crystalline ice-like materials, built up from hydrogen-bonded water molecules, forming cages occluding non-polar gaseous guest molecules, including CH, CO and even H and He gas. In nature, they are found in low-temperature and high-pressure conditions.
View Article and Find Full Text PDFSustain Energy Fuels
June 2024
Laboratory for the Electrification of Chemical Processes and Hydrogen (ElectrifHy), University of Antwerp Olieweg 97 2020 Antwerp Belgium
This study introduces solid-state tuning of a mesostructured cellular foam (MCF) to enhance hydrogen (H) storage in clathrate hydrates. Grafting of promoter-like molecules (, tetrahydrofuran) at the internal surface of the MCF resulted in a substantial improvement in the kinetics of formation of binary H-THF clathrate hydrate. Identification of the confined hydrate as sII clathrate hydrate and enclathration of H in its small cages was performed using XRD and high-pressure H NMR spectroscopy respectively.
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August 2024
Center for Surface Chemistry and Catalysis - Characterization and Application Team (COK-KAT), KU Leuven, 3001 Leuven, Belgium.
Inductive heating swing adsorption (IHSA) using hybrid adsorbents incorporating a porous material and ferrite nanoparticles holds promise to be a performant, electrified alternative for conventional gas separation. Successful implementation of hybrid adsorbents in IHSA depends on achieving a maximal specific absorption rate (SAR) in the conditions and at the frequency of the induction setup. This paper outlines and demonstrates successful strategies for optimization of the particle composition, tailoring the coercivity and susceptibility of the ferrite particles to optimal performance in a given alternating magnetic field.
View Article and Find Full Text PDFAnal Chem
April 2024
Centre for Surface Chemistry and Catalysis - Characterization and Application Team (COK-KAT), Celestijnenlaan 200F Box 2461, 3001 Heverlee, Belgium.
Introduction of a dielectric material in a nuclear magnetic resonance (NMR) probe head modifies the frequency response of the probe circuit, a phenomenon revealed by detuning of the probe. For NMR spectroscopy, this detuning is corrected for by tuning and matching the probe head prior to the NMR measurement. The magnitude of the probe detuning, "the dielectric shift", provides direct access to the dielectric properties of the sample, enabling NMR spectrometers to simultaneously perform both dielectric and NMR spectroscopy.
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September 2023
Centre for Surface Chemistry and Catalysis-Characterization and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200F Box 2461, 3001 Heverlee, Belgium.
Selective catalytic reduction (SCR) of NO by ammonia is one of the dominant pollution abatement technologies for near-zero NO emission diesel engines. A crucial step in the reduction of NO to N with Cu zeolite NH-SCR catalysts is the generation of a multi-electron donating active site, implying the permanent or transient dimerization of Cu ions. Cu atom mobility has been implicated by computational chemistry as a key factor in this process.
View Article and Find Full Text PDFAcc Chem Res
September 2023
Center for Surface Chemistry and Catalysis - Characterization and Application Team (COK-KAT), KU Leuven, 3001 Leuven, Belgium.
ConspectusSince the discovery of synthetic zeolites in the 1940s and their implementation in major industrial processes involving adsorption, catalytic conversion, and ion exchange, material scientists have targeted the rational design of zeolites: controlling synthesis to crystallize zeolites with predetermined properties. Decades later, the fundamentals of zeolite synthesis remain largely obscured in a black box, rendering rational design elusive. A major prerequisite to rational zeolite design is to fully understand, and control, the elementary processes governing zeolite nucleation, growth, and stability.
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August 2023
Centre for Surface Chemistry and Catalysis - Characterization and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200F Box 2461, 3001-Heverlee, Belgium.
Upon liquid phase adsorption of C-C primary alcohols on high silica MFI zeolites (Si/Al = 11.5-140), the concentration of adsorbed molecules largely exceeds the concentration of traditional adsorption sites: Brønsted acid and defect sites. Combining quantitative H MAS NMR, qualitative multinuclear NMR and IR spectroscopy, hydrogen bonding of the alcohol function to oxygen atoms of the zeolite siloxane bridges (Si-O-Si) was shown to drive the additional adsorption.
View Article and Find Full Text PDFChem Soc Rev
May 2020
KU Leuven, Centre for Surface Chemistry and Catalysis - Characterization and Application Team (COK-KAT), Celestijnenlaan 200F, Box 2461, B-3001 Heverlee, Belgium.
Water is the sustainable solvent of excellence, but its high polarity limits the solubility of non-polar compounds. Confinement of water in hydrophobic pores alters its hydrogen bonding structure and related properties such as dielectric constant and solvation power. Whether this special state of confined water can be rendered useful in chemical processes is hitherto underexplored.
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