Blar i NTNU Open på forfatter "van Beek, Wouter"
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Capturing metal-support interactions in situ during the reduction of a Re promoted Co/γ-Al2O3 catalyst
Tsakoumis, Nikolaos; Johnsen, Rune E.; van Beek, Wouter; Rønning, Magnus; Rytter, Erling; Holmen, Anders (Journal article; Peer reviewed, 2016)The reduction of a Re promoted Co/γ-Al2O3 catalyst was monitored in situ by synchrotron X-ray powder diffraction (XRPD) under H2 environment. Whole powder pattern analysis revealed a non-linear expansion of the unit cell ... -
Composition and morphology tuning during hydrothermal synthesis of SrxBa1−xNb2O6 tetragonal tungsten bronzes studied by in situ X-ray diffraction
Grendal, Ola Gjønnes; Blichfeld, Anders Bank; Vu, Tuong-Dan; van Beek, Wouter; Selbach, Sverre Magnus; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2019)Current interest in 1D ferroelectric materials calls for cheap, controllable, reproducible and environmentally friendly synthesis routes. Hydrothermal synthesis stands out as one of the most promising routes, but a thorough ... -
Controlling Oriented Attachment and in Situ Functionalization of TiO2 Nanoparticles During Hydrothermal Synthesis with APTES
Dalod, Antoine Robert Marie; Grendal, Ola Gjønnes; Skjærvø, Susanne Linn; Inzani, Katherine; Selbach, Sverre Magnus; Henriksen, Lars; van Beek, Wouter; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2017)Understanding growth mechanisms and the role of surface functionalization is of key importance to control shape and morphology of nanoparticles and their properties. Here, we describe the growth mechanism and the effect ... -
Evaluation of Reoxidation Thresholds for γ-Al2O3-Supported Cobalt Catalysts under Fischer - Tropsch Synthesis Conditions
Tsakoumis, Nikolaos; Walmsley, John; Rønning, Magnus; van Beek, Wouter; Rytter, Erling; Holmen, Anders (Journal article; Peer reviewed, 2017)Size-dependent phenomena at the nanoscale influence many applications, notably in the science of heterogeneous catalysis. In cobalt-based Fischer–Tropsch synthesis (FTS), the size of Co nanoparticles (NPs) dictates to a ... -
Facile Low Temperature Hydrothermal Synthesis of BaTiO3 Nanoparticles Studied by In Situ X-ray Diffraction
Grendal, Ola Gjønnes; Blichfeld, Anders Bank; Skjærvø, Susanne Linn; van Beek, Wouter; Selbach, Sverre Magnus; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2018)Ferroelectric materials are crucial for today’s technological society and nanostructured ferroelectric materials are important for the downscaling of devices. Controlled and reproducible synthesis of these materials are, ... -
Multivariate curve resolution applied to in situ X-ray absorption spectroscopy data: An efficient tool for data processing and analysis
Voronov, Alexey; Urakawa, Atsushi; van Beek, Wouter; Tsakoumis, Nikolaos; Emerich, Hermann; Rønning, Magnus (Journal article; Peer reviewed, 2014)Large datasets containing many spectra commonly associated with in situ or operando experiments call for new data treatment strategies as conventional scan by scan data analysis methods have become a time-consuming bottleneck. ... -
Rationalization of hydrothermal synthesis of NaNbO3 by rapid in situ time-resolved synchrotron X-ray diffraction
Skjærvø, Susanne Linn; Wells, Kristin Høydalsvik; Sommer, Sanna; Vu, Tuong-Dan; Tolchard, Julian R; van Beek, Wouter; Grande, Tor; Iversen, Bo B.; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2018)In situ monitoring of the formation of crystalline phases during conventional hydrothermal synthesis is experimentally challenging. Here, we report an in situ time-resolved synchrotron X-ray diffraction study during ... -
Reaction pathway of the hydrothermal synthesis of AgCuO2 from in situ time-resolved X-ray diffraction
Liu, hongjun; Grendal, Ola Gjønnes; Skjærvø, Susanne Linn; Dalod, Antoine Robert Marie; van Beek, Wouter; sekkat, abderrahime; Einarsrud, Mari-Ann; munoz-Rojas, David (Journal article; Peer reviewed, 2020)AgCuO2 is an interesting semiconductor oxide with appealing optical and electronic properties. While the oxide has been synthesized in bulk by different approaches, no study on the formation mechanism has been carried out ...