Browsing Kjemisk institutt by Author "Wragg, David Stephen"
Now showing items 1-13 of 13
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Wragg, David Stephen; Kalantzopoulos, Georgios; Pappas, Dimitrios; Pinilla-Herrero, Irene; Rojo-Gama, Daniel; Redekop, Evgeniy; Di Michiel, Marco; Beato, Pablo; Lundegaard, Lars Fahl; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)We have used operando X-ray diffraction computed tomography (XRD-CT) analysed by rigorous crystallographic methods to reveal the behaviour of a zeolite/alumina based catalyst extrudate in the methanol-to-hydrocarbon reaction ...
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Fjellvåg, Asbjørn Slagtern; Jørgensen, Peter Stanley; Waller, David; Wragg, David Stephen; Michiel, Marco Di; Sjåstad, Anja Olafsen (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)We have investigated industrial Pd and Pd/Ni (91.3/8.7 at.%) wires and gauzes used for Pt-catchment during the ammonia oxidation process, focusing on the origin of the grain reconstruction phenomena. In situ X-ray absorption ...
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Kumar, Rohit; Rauwel, Protima; Kriipsalu, Mait; Wragg, David Stephen; Rauwel, Erwan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)This study presents the adsorption capability of a filter composed of sand coated with cobalt nanomaterials (CoNM) for the extraction of manganese ions from aqueous media. The study was performed in both batch and dynamic ...
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Brennhagen, Anders; Cavallo, Carmen; Wragg, David Stephen; Ponniah, Vajeeston; Sjåstad, Anja Olafsen; Koposov, Alexey; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Based on the same rocking-chair principle as rechargeable Li-ion batteries, Na-ion batteries are promising solutions for energy storage benefiting from low-cost materials comprised of abundant elements. However, despite ...
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Kalantzopoulos, Georgios; Rojo Gama, Daniel; Pappas, Dimitrios; Dovgaliuk, Iurii; Olsbye, Unni; Beato, Pablo; Lundegaard, Lars F.; Wragg, David Stephen; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)We have monitored the regeneration of H-ZSM-5 via operando time-resolved powder X-Ray diffraction (PXRD) coupled with mass spectroscopy (MS). Parametric Rietveld refinements and calculation of the extra-framework electronic ...
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Park, Heesoo; Wragg, David Stephen; Koposov, Alexey (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)Li intercalation and graphite stacking have been extensively studied because of the importance of graphite in commercial Li-ion batteries. Despite this attention, there are still questions about the atomistic structures ...
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Gerz, Isabelle; Jannuzzi, Sergio Augusto Venturinelli; Hylland, Knut Tormodssønn; Negri, Chiara; Wragg, David Stephen; Øien-Ødegaard, Sigurd; Tilset, Mats; Olsbye, Unni; DeBeer, Serena; Amedjkouh, Mohamed (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)A series of Cu(I) complexes of bidentate or tetradentate Schiff base ligands bearing either 1-H-imidazole or pyridine moieties were synthesized. The complexes were studied by a combination of NMR and X-ray spectroscopic ...
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Paredes, Patricio; Rauwel, Erwan Yann; Wragg, David Stephen; Rapenne, Laetitia; Estephan, Elias; Volobujeva, Olga; Rauwel, Protima (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Sunlight-driven photocatalytic degradation is an effective and eco-friendly technology for the removal of organic pollutants from contaminated water. Herein, we describe the one-step synthesis of Cu-Cu2O-Cu3N nanoparticle ...
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Hylland, Knut Tormodssønn; Schmidtke, Inga; Wragg, David Stephen; Nova, Ainara; Tilset, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Cyclometalated Au(III) complexes are of interest due to their catalytic, medicinal, and photophysical properties. Herein, we describe the synthesis of derivatives of the type (N,C)Au(OAcF)2 (OAcF = trifluoroacetate) and ...
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Hylland, Knut Tormodssønn; Gerz, Isabelle; Wragg, David Stephen; Øien-Ødegaard, Sigurd; Tilset, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)Multidentate Schiff base ligands derived from a selection of biphenyl- and terphenyl polyamines were synthesized, and their reactivity towards divalent (Ni, Cu, Zn, Cd) and trivalent (Co, Y, Lu) metals was studied by ...
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Wragg, David Stephen; Skautvedt, Casper; Brennhagen, Anders; Geiss, Carina; Checchia, Stefano; Koposov, Alexey (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)The existing set of characterization tools does not permit a full description of the three-dimensional (3D) structure and operating mechanisms of amorphous, low-scattering alloying active materials in metal-ion batteries. ...
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Berdiell, Izar Capel; Braghin, Giorgio Bruno; Cordero-Lanzac, Tomas; Beato, Pablo; Lundegaard, Lars F.; Wragg, David Stephen; Bordiga, Silvia; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Abstract We used the methanol-to-hydrocarbon (MTH) reaction as a shape-selective model reaction to investigate coke formation in zeolite H-Ferrierite. Despite being a 2D topology in terms of channel propagation, the FER ...
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Brennhagen, Anders; Skautvedt, Casper; Cavallo, Carmen; Wragg, David Stephen; Koposov, Alexey; Sjåstad, Anja Olafsen; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)Development of new anode materials for Na-ion batteries strongly depends on a detailed understanding of their cycling mechanism. Due to instrumental limitations, the majority of mechanistic studies focus on operando ...