Browsing Kjemisk institutt by Author "Norby, Truls Eivind"

Now showing items 21-40 of 44

  • Increasing the thermal expansion of proton conducting Y-doped BaZrO3 by Sr and Ce substitution 
    Dayaghi, Amir Masoud; Haugsrud, Reidar; Stange, Marit Synnøve Sæverud; Larring, Yngve; Strandbakke, Ragnar; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Proton conducting oxide electrolytes find potential application in proton ceramic fuel cells and electrolyzers operating at intermediate temperatures, e.g. 400–600 °C. However, state-of-the-art proton conducting ceramics ...
  • Inter-diffusion across a direct p-n heterojunction of Li-doped NiO and Al-doped ZnO 
    Desissa, Temesgen D.; Haugsrud, Reidar; Wiik, Kjell; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    We herein report inter-diffusion across the interface between p-type Ni0.98Li0.02O and n-type Zn0.98Al0.02O for various applications including p-n-heterojunction diodes and oxide thermoelectrics. Diffusion couples were ...
  • Investigation of the electrostatic potential of a grain boundary in Y-substituted BaZrO3 using inline electron holography 
    Bondevik, Tarjei; Ness, Heine H.; Bazioti, Kalliopi; Norby, Truls Eivind; Løvvik, Ole Martin; Koch, Christoph T.; Prytz, Øystein (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    We apply inline electron holography to investigate the electrostatic potential across an individual BaZr0.9Y0.1O3 grain boundary. With holography, we measure a grain boundary potential of −1.3 V. Electron energy loss ...
  • Ionic conductivity in LixTaOy thin films grown by Atomic Layer Deposition (ALD) 
    Hu, Yang; Miikkulainen, Ville; Mizohata, Kenichiro; Norby, Truls Eivind; Nilsen, Ola; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The material system Li-Ta-O is a promising candidate for thin-film solid-state electrolytes in Li-ion batteries. In the present study, we have varied the Li content x in LixTaOy thin films grown by atomic layer deposition ...
  • La2Ce2O7 doped with alkaline earth elements: Phase behavior, hydration and electrical properties 
    Ismail, Sara Adeeba; Jiang, Lulu; Zhong, Peng; Norby, Truls Eivind; Han, Donglin (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    La2Ce2O7 is known to be a disordered fluorite, i.e., 50% La-doped CeO2, exhibiting oxide ion conduction with contributions from protons in wet atmospheres and minority electrons under reducing conditions. Here, we report ...
  • Lanthanum strontium cobaltite as interconnect in oxide thermoelectric generators 
    Madathil, Reshma Krishnan; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Issues related to use of metallic interconnects in oxide thermoelectric generators (TEGs) need to be addressed to secure performance and durability. Metal interconnects suffer from high cost of noble metals or chemical ...
  • Layered microstructures based on BaZr0.85Y0.15O3−δ by pulsed laser deposition for metal-supported proton ceramic electrolyser cells 
    Stefan, Elena; Stange, Marit Synnøve Sæverud; Denonville, Christelle; Larring, Yngve; Hildenbrand, Nicolas; Norby, Truls Eivind; Haugsrud, Reidar (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    Planar metal-supported cell designs provide cost-effective scaling-up of solid oxide fuel cells and electrolysers. Here, we report on the fabrication of a BaZr0.85Y0.15O3−δ–NiO (BZY15–NiO) composite electrode and ...
  • Mechanisms of Protonic Surface Transport in Porous Oxides: Example of YSZ 
    Stub, Sindre Østby; Vøllestad, Einar; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    The electrical properties and the charge carrier mechanism of porous 8 mol% yttria-stabilized zirconia (8YSZ) ceramic samples have been investigated over wide ranges of relative humidity (RH) and temperature (25-400 ºC). ...
  • Microstructure and electrochemical behavior of layered cathodes for molten carbonate fuel cell 
    Ćwieka, K.; Lysik, A.; Wejrzanowski, T.; Norby, Truls Eivind; Xing, Wen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    In the present paper, we demonstrate how modifications of the microstructure and the chemical composition can influence the electrochemical behavior of cathodes for molten carbonate fuel cells (MCFCs). Based on our experience, ...
  • Mixed proton and electron conducting double perovskite anodes for stable and efficient tubular proton ceramic electrolysers 
    Vøllestad, Einar; Strandbakke, Ragnar; Tarach, Mateusz; Catalán-Martinez, David; Fontaine, Marie-Laure; Beeaff, Dustin; Clark, Daniel Ryan; Serra, José M.; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Hydrogen production from water electrolysis is a key enabling energy storage technology for the large-scale deployment of intermittent renewable energy sources. Proton ceramic electrolysers (PCEs) can produce dry pressurized ...
  • MOF-modified polyester fabric coated with reduced graphene oxide/polypyrrole as electrode for flexible supercapacitors 
    Barakzehi, Marjan; Montazer, Majid; Sharif, Farhad; Norby, Truls Eivind; Chatzitakis, Athanasios Eleftherios (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    The interest in wearable supercapacitors has been flourishing in both the scientific and industrial fields. Here, daily-used polyester fabric (PET) is modified by using an Al-based MOF, namely MIL-53(Al), via a layer-by-layer ...
  • On the Conductivity of KBaPO4 and Its Decomposition in Steam and Water 
    Elstad, Aleksander A; Nguyen, Kevin; Sartori, Sabrina; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    KBaPO4 – recently reported to hydrate in steam at 80°C into a novel low-temperature protonic conductor – was synthesized by a solid state reaction and its electrical properties characterized by impedance spectroscopy. At ...
  • On the high-temperature oxidation of ZnSb for thermoelectric applications 
    Madathil, Reshma; Thoreton, Vincent; Prytz, Øystein; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Thermoelectric ZnSb has a native surface oxide layer of Sb2O5 +ZnO, while HT oxidation in air resulted in selective oxidation to ZnO, with no detectable Sb by STEM-EDS. The ZnO consisted of an inner nano-granular and a ...
  • Photocatalytic generation of gas phase reactive oxygen species from adsorbed water: Remote action and electrochemical detection 
    Sun, Xinwei; Xu, Kaiqi; Chatzitakis, Athanasios Eleftherios; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The improvement of indoor environments is of great importance as it can significantly improve human health, comfort and productivity. Herein, different forms of TiO2 nanorods were used as the photocatalyst for generation ...
  • Relating defect chemistry and electronic transport in the double perovskite Ba1-xGd0.8La0.2+xCo2O6-d (BGLC) 
    Vøllestad, Einar; Schrade, Matthias; Segalini, Julie; Strandbakke, Ragnar; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    Rare earth double perovskites comprise a class of functional oxides with interesting physiochemical properties both for low- and high-temperature applications. However, little can be found relating electrical properties ...
  • Structure and water uptake in BaLnCo2O6−δ (Ln = La, Pr, Nd, Sm, Gd, Tb and Dy) 
    Wachowski, Sebastian Lech; Szpunar, Iga; Sørby, Magnus Helgerud; Mielewczyk-Gryń, Aleksandra; Balaguer, Maria; Ghica, Corneliu; Istrate, Marian Cosmin; Gazda, Maria; Gunnæs, Anette Eleonora; Serra, José M.; Norby, Truls Eivind; Strandbakke, Ragnar (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    The structure of BaLnCo2O6-δ (Ln =La, Pr, Nd, Sm, Gd, Tb and Dy) was studied by the means of synchrotron radiation powder X-ray diffraction, neutron powder diffraction and Transmission Electron Microscopy (TEM), while water ...
  • Structure, hydration, and proton conductivity in 50% La and Nd doped CeO2 – La2Ce2O7 and Nd2Ce2O7 – and their solid solutions 
    Kalland, Liv-Elisif Queseth; Løken, Andreas; Bjørheim, Tor Svendsen; Haugsrud, Reidar; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    We have measured water uptake and hydration enthalpy in 50% La and Nd doped CeO2, also to be taken as compositions in the series La2−xNdxCe2O7 (x = 0.0, 0.5, 1.0 and 2.0) using combined thermogravimetry (TG) and differential ...
  • Support effects on catalysis of low temperature methane steam reforming 
    Torimoto, Maki; Ogo, Shuhei; Hisai, Yudai; Takahashi, Ayako; Ma, Quanbao; Seo, Jeong Gil; Tsuneki, Hideaki; Norby, Truls Eivind; Sekine, Yasushi (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Low temperature (<500 K) methane steam reforming in an electric field was investigated over various catalysts. To elucidate the factors governing catalytic activity, activity tests and various characterization methods were ...
  • Surface reactivity and cation non-stoichiometry in BaZr1-xYxO3-δ (x=0-0.2) exposed to CO2 at elevated temperature 
    Sazinas, Rokas; Sunding, Martin Fleissner; Thøgersen, Annett; Sakaguchi, Isao; Norby, Truls Eivind; Grande, Tor; Polfus, Jonathan M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The reactivity of BaZr1−xYxO3−δ (x = 0–0.2) ceramics under 1 atm CO2 at 650 °C for up to 1000 h was investigated in order to elucidate possible degradation processes occurring when the material is applied as a proton-conducting ...
  • Ta3N5/Co(OH)x composites as photocatalysts for photoelectrochemical water splitting 
    Xu, Kaiqi; Chatzitakis, Athanasios Eleftherios; Jensen, Ingvild Julie Thue; Grandcolas, Mathieu; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / SubmittedVersion, 2019)
    Ta3N5 nanotubes (NTs) were obtained from nitridation of Ta2O5 NTs, which were grown directly on Ta foil through a 2-step anodization procedure. With Co(OH)x decoration, a photocurrent density as high as 2.3 mA cm−2 (1.23 ...