Blar i NTNU Open på forfatter "Knudsen, Jan"
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Activity and segregation behavior of Pd75%Ag25%(1 1 1) during CO oxidation – An in situ NAP-XPS investigation
Svenum, Ingeborg-Helene; Strømsheim, Marie D.; Knudsen, Jan; Venvik, Hilde Johnsen (Journal article; Peer reviewed, 2022)The surface reactivity during CO oxidation over Pd(1 1 1) and Pd75%Ag25%(1 1 1) single crystals has been investigated using near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) under excess oxygen conditions ... -
Near Ambient Pressure XPS Investigation of CO Oxidation Over Pd3Au(100)
Strømsheim, Marie Døvre; Knudsen, Jan; Farstad, Mari Helene; Sørvik, Linn Cecilie; Guo, Xiaoyang; Venvik, Hilde Johnsen; Borg, Anne (Journal article; Peer reviewed, 2017)The CO oxidation behavior under excess oxygen and near stoichiometric conditions over the surface of Pd3Au(100) has been studied by combining near-ambient pressure X-ray photoelectron spectroscopy and quadrupole mass ... -
Reversed Hysteresis during CO Oxidation over Pd75Ag25(100)
Fernandes, Vasco Rafael P; Van der Bossche, Maxime; Knudsen, Jan; Farstad, Mari Helene; Gustafson, Johan; Venvik, Hilde Johnsen; Grönbeck, Henrik; Borg, Anne (Journal article; Peer reviewed, 2016)CO oxidation over Pd(100) and Pd75Ag25(100) has been investigated by a combination of near-ambient-pressure X-ray photoelectron spectroscopy, quadrupole mass spectrometry, density functional theory calculations, and ... -
Segregation dynamics of a Pd-Ag surface during CO oxidation investigated by NAP-XPS
Strømsheim, Marie Døvre; Svenum, Ingeborg-Helene; Mahmoodinia, Mehdi; Boix, Virgínia; Knudsen, Jan; Venvik, Hilde Johnsen (Peer reviewed; Journal article, 2021)The dynamic changes in composition in the near-surface region of a Pd75%Ag25%(100) single crystal were monitored using near-ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) during CO oxidation under oxygen rich ... -
Stroboscopic operando spectroscopy of the dynamics in heterogeneous catalysis by event-averaging
Knudsen, Jan; Gallo, Tamires; Boix, Virgínia; Strømsheim, Marie Døvre; D’Acunto, Giulio; Goodwin, Christopher; Wallander, Harald; Zhu, Suyun; Soldemo, Markus; Lömker, Patrick; Cavalca, Filippo; Scardamaglia, Mattia; Degerman, David; Nilsson, Anders; Amann, Peter; Shavorskiy, Andrey; Schnadt, Joachim (Peer reviewed; Journal article, 2021)Heterogeneous catalyst surfaces are dynamic entities that respond rapidly to changes in their local gas environment, and the dynamics of the response is a decisive factor for the catalysts’ action and activity. Few probes ...