Browsing Kjemisk institutt by Author "Strandbakke, Ragnar"

Now showing items 1-14 of 14

  • Development of composite steam electrodes for electrolyzers based on barium zirconate 
    Bausa, Nuria; Solis, Cecilia; Strandbakke, Ragnar; Serra, José Manuel (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF), La2NiO4 + δ (LNO), La0.87Sr0.13CrO4 (LSC), La0.8Sr0.2MnO3 − δ (LSM) and Ba0.5Sr0.5Co0.8Fe0.2O3 − δ (BSCF) composite anodes deposited on proton-conducting BaCe0.2Zr0.7Y0.1O3 − δ (BCZY27) ...
  • Double Perovskite Cobaltites Integrated in a Monolithic and Noble Metal-Free Photoelectrochemical Device for Efficient Water Splitting 
    Zhu, Junjie; Guðjónsdóttir, Jónína; Strandbakke, Ragnar; Both, Kevin Gregor; Aarholt, Thomas; Almeida Carvalho, Patricia; Sørby, Magnus Helgerud; Jensen, Ingvild Julie Thue; Guzik, Matylda N.; Norby, Truls Eivind; Haug, Halvard; Chatzitakis, Athanasios Eleftherios (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Water photoelectrolysis has the potential to produce renewable hydrogen fuel, therefore addressing the intermittent nature of sunlight. Herein, a monolithic, photovoltaic (PV)-assisted water electrolysis device of minimal ...
  • Earth-Abundant Electrocatalysts in Proton Exchange Membrane Electrolyzers 
    Sun, Xinwei; Xu, Kaiqi; Fleischer, Christian; Liu, Xin; Grandcolas, Mathieu; Strandbakke, Ragnar; Bjørheim, Tor Svendsen; Norby, Truls Eivind; Chatzitakis, Athanasios Eleftherios (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    In order to adopt water electrolyzers as a main hydrogen production system, it is critical to develop inexpensive and earth-abundant catalysts. Currently, both half-reactions in water splitting depend heavily on noble metal ...
  • Electric and magnetic properties of Lanthanum Barium Cobaltite 
    Szpunar, Iga; Wachowski, Sebastian; Miruszewski, Tadeusz; Dzierzgowski, Kacper; Górnicka, Karolina; Klimczuk, Tomasz; Sørby, Magnus Helgerud; Balaguer, María; Serra, José M.; Strandbakke, Ragnar; Gazda, Maria; Mielewczyk-Gryń, Aleksandra (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    The cubic Ba0.5La0.5CoO3‐δ was synthesized using solid state reaction. The structural properties were determined by the simultaneous refinement of Synchrotron Powder X‐ray Diffraction and Neutron Powder Diffraction data. ...
  • Electrical transport in a molten-solid V2O5–ZrV2O7 composite 
    Emhjellen, Linn Katinka Susanne Shi; Strandbakke, Ragnar; Haugsrud, Reidar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Molten-solid composite oxides are candidates as oxygen transport membranes (OTMs) at intermediate temperatures (500–700 °C). Effects of the constituent phases and interphases on surface reactions and transport processes ...
  • Electrochemical performance of Co3O4/CeO2 electrodes in H2S/H2O atmospheres in a proton-conducting ceramic symmetrical cell with BaZr0.7Ce0.2Y0.1O3 solid electrolyte 
    Kraia, Tzouliana; Wachowski, Sebastian Lech; Vøllestad, Einar; Strandbakke, Ragnar; Konsolakis, M.; Norby, Truls Eivind; Marnellos, G.E. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    The electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the ...
  • High-Temperature Structural and Electrical Properties of BaLnCo2O6 Positrodes 
    Szpunar, Iga; Strandbakke, Ragnar; Sørby, Magnus Helgerud; Wachowski, Sebastian Lech; Balaguer, Maria; Tarach, Mateusz; Serra, José M.; Witkowska, Agnieszka; Dzik, Ewa; Norby, Truls Eivind; Gazda, Maria; Mielewczyk-Gryń, Aleksandra (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The application of double perovskite cobaltites BaLnCo2O6−δ (Ln = lanthanide element) in electrochemical devices for energy conversion requires control of their properties at operating conditions. This work presents a study ...
  • Impedance spectroscopy study of Au electrodes on Gd-doped CeO2 (GDC) – Molten Li2CO3+Na2CO3 (LNC) composite electrolytes 
    Vijayan Sobhana, Dilimon; Strandbakke, Ragnar; Norby, Truls (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We herein report an impedance spectroscopy study of Au electrodes on Gd-doped CeO2 (GDC) – molten Li2CO3+Na2CO3 (LNC) composite electrolytes in O2 and O2+CO2 atmospheres. Complementary measurements of Au on GDC alone are ...
  • 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 ...
  • 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 ...
  • Oxygen electrodes for ceramic fuel cells with proton and oxide ion conducting electrolytes 
    Strandbakke, Ragnar (Doctoral thesis / Doktoravhandling, 2014)
    The overall aim of this work is to contribute to a better understanding of the reactions taking place at the oxygen electrode in proton ceramic fuel cells (PCFCs) and, moreover, to develop new materials with improved ...
  • 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 ...
  • The synergistic catalyst-carbonates effect on the direct bituminous coal fuel cell performance 
    Kaklidis, N.; Strandbakke, Ragnar; Arenillas, A.; Menendez, Javier A; Konsolakis, M.; Marnellos, G.E. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    The current work explores the feasibility to improve the performance of a Direct Carbon Fuel Cell (DCFC): CO2 + bituminous coal|Co-CeO2/YSZ/Ag|Air by infusing a gasification catalyst (Co/CeO2) and/or Li-K carbonates mixture ...