Blar i SINTEF Open på forfatter "Vøllestad, Einar"

Viser treff 1-7 av 7

    • B-site cation inter-diffusion in yttrium substituted barium zirconate 

      Hasle, Ida; Waldow, Stephan P.; Gries, Ute N.; De Souza, Roger A.; Vøllestad, Einar; Haugsrud, Reidar (Peer reviewed; Journal article, 2021)
      B-site cation inter-diffusion in the ABO3 perovskite yttrium-substituted barium zirconate (BZY) was studied at temperatures from 1100 to 1460 °C under reducing and oxidising conditions. The experiments followed two different ...

    • Electrochemically driven degradation of chemical solution deposited ferroelectric thin-films in humid ambient 

      Dahl-Hansen, Runar Plunnecke; Polfus, Jonathan Marc; Vøllestad, Einar; Akkopru-Akgun, Betul; Denis, Lyndsey; Coleman, Kathleen; Tyholdt, Frode; Trolier-Mckinstry, Susan E; Tybell, Per Thomas Martin (Peer reviewed; Journal article, 2020)
      The ambient humidity significantly accelerates the degradation of lead zirconate titanate (PZT) films in microelectromechanical systems; the cause of such degradation is under debate. Here, it is shown that the degradation ...

    • Hydrogen from wet air and sunlight in a tandem photoelectrochemical cell 

      Xu, Kaiqi; Chatzitakis, Athanasios Eleftherios; Vøllestad, Einar; Ruan, Qiushi; Tang, Junwang; Norby, Truls Eivind (Peer reviewed; Journal article, 2019)
      A solid-state photoelectrochemical (SSPEC) cell is an attractive approach for solar water splitting, especially when it comes to monolithic device design. In a SSPEC cell the electrodes distance is minimized, while the use ...

    • 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 (Peer reviewed; Journal article, 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 ...

    • On the mechanism of Mn(II)-doping in Scandia stabilized zirconia electrolytes 

      Vøllestad, Einar; Øygarden, Vegar; Graff, Joachim Seland; Sunding, Martin Fleissner; Pietras, John D.; Polfus, Jonathan M.; Fontaine, Marie-Laure (Peer reviewed; Journal article, 2022)
      Cubic Scandia-stabilized zirconia (ScSZ) is an attractive electrolyte material for solid oxide cells due to its significant ionic conductivity, provided that the phase transition to its rhombohedral polymorph upon cooling ...

    • Surface protonic conductivity in chemisorbed water in porous nanoscopic CeO2 

      Sun, Xinwei; Vøllestad, Einar; Rørvik, Per Martin; Prodinger, Sebastian; Kalantzopoulos, Giorgios N.; Chatzitakis, Athanasios; Norby, Truls (Peer reviewed; Journal article, 2023)
      CeO2 surfaces play decisive roles in heterogeneous catalysis of important processes. Here, we investigate adsorption and dissociation of water and migration of protons on internal surfaces of nanoscopic porous CeO2. Sorption ...

    • Thermo-fluid dynamics modelling of steam electrolysis in fully-assembled tubular high-temperature proton-conducting cells 

      Catalán-Martínez, D.; Navarrete, L.; Tarach, M.; Santos-Blasco, J.; Vøllestad, Einar; Norby, Truls; Budd, M.I.; Veenstra, P.; Serra, J.M. (Peer reviewed; Journal article, 2022)
      Electrolysis based on renewable energies offers a promising carbon-free solution for hydrogen generation and storage. The recent developments of proton ceramic electrolysis cells operating at intermediate temperatures bear ...