Blar i NTNU Open på forfatter "Sunde, Svein"
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Hole annihilation vs. induced convection: Breakdown of different contributions to the photocorrosion mechanism of oxide-covered iron
Wilson, Håvard; Sunde, Svein; Erbe, Andreas (Peer reviewed; Journal article, 2021)The mechanism behind corrosion rate increase of anodised iron under illumination has been studied by comparing photocurrents with corrosion currents from polarisation curves under controlled convection. Under illumination ... -
Interface resolved simulations of continuum scale electrochemical hydrogen evolution
Vachaparambil, Kurian J. (Doctoral theses at NTNU;2020:363, Doctoral thesis, 2020)An important aspect of improving the efficiency of water electrolysis is to remove the electrochemically generated hydrogen and oxygen bubbles. The evolution of these gases, which are associated with increased electrical ... -
Ir based catalysts for PEM water electrolysis prepared via galvanic displacement
Thorbjørnsen, Kristian Fredrik Klepp (Doctoral theses at NTNU;2021:187, Doctoral thesis, 2021)In the transition away from non-renewable energy sources, the use of fluctuating power sources such as wind and solar are increasing. This creates a need for temporary storage of excess energy when production exceeds demand. ... -
Iridium-based Electrocatalysts for the Oxygen Evolution Reaction
Reksten, Anita (Doctoral thesis at NTNU;2016:226, Doctoral thesis, 2016)English version: This thesis covers several topics related to the anodic catalyst for the oxygen evolution reaction (OER) in polymer electrolyte membrane (PEM) water electrolysis. Water electrolysis is considered one ... -
Manganese Oxide in Zinc Electrowinning: Deposition and removal at platinum, gold and IrO2-Ta2O5/Ti anodes in sulphuric acid
Skaftun, Siri Marie (Doctoral theses at NTNU;2021:242, Doctoral thesis, 2021)An environmentally friendly and energy efficient replacement for lead anodes in zinc electrowinning is highly desired. Oxygen evolution reaction (OER) is the desired anode reaction in acidic sulphate electrolytes. However, ... -
Mass-transport impedance at channel electrodes: Accurate and approximate solutions
Holm, Thomas; Ingdal, Mats; Fanavoll, Espen Vinge; Sunde, Svein; Seland, Frode; Harrington, David A. (Journal article; Peer reviewed, 2016)Accurate numerical electrochemical impedance spectra at channel electrodes are obtained using commercial finite element method software. These agree with experimental measurements on the hexaammineruthenium(II/III) reversible ... -
Method for Studying High Temperature Aqueous Electrochemical Systems: A Self-Pressurized Autoclave
Holm, Thomas; Dahlstrøm, Per Kristian; Sunde, Svein; Harrington, David A.; Seland, Frode (Journal article; Peer reviewed, 2016) -
Method for studying high temperature aqueous electrochemical systems: Methanol and glycerol oxidation
Holm, Thomas; Dahlstrøm, Per Kristian; Burheim, Odne Stokke; Sunde, Svein; Harrington, David A.; Seland, Frode (Journal article; Peer reviewed, 2016)A method for high purity aqueous electrochemical experiments at temperatures above the normal boiling point of water and at temperatures up to 140 °C is described. A three-electrode cell in a self-pressurized glass autoclave ... -
Micro-fluidic flow cells for studies of electrochemical reactions
Ingdal, Mats (Master thesis, 2014)Micro fluidic flow cells (MFFCs) are a relatively new technique for characterization of electrochemical reactions. This work includes both techniques for manufacturing the cells and electrochemical characterization of ... -
Microfluidic and high temperaturetechniques for aqueous electrochemistry
Holm, Thomas (Doctoral thesis at NTNU;2016:196, Doctoral thesis, 2016)Liquid organic fuels are highly desired energy carriers as they have a high energy density, simple production, and can benefit directly from existing infrastructure. However, the electrochemical conversion efficiency is ... -
Microfluidic flow cells for the analysis of electrocatalytic reactions
Fanavoll, Espen Vinge (Doctoral theses at NTNU;2017:331, Doctoral thesis, 2017)English summary Microfluidic flow cells for the analysis of electrocatalytic reactions The electro-oxidation of small organic molecules such as methanol could play an important role in the transition from fossil fuels ... -
Modeling of electrochemical and photoelectrochemical impedance functions for films
Småbråten, Didrik Rene (Master thesis, 2014)The aim of this study was to develop mathematical models for electrochemical and photoelectrochemical impedance transfer functions for mixed conducting films. These models include electrochemical impedance spectroscopy ... -
Multilevel coupled cluster theory: Development, implementation and application of multilevel coupled cluster theory for core and valence excited states
Myhre, Rolf Heilemann (Doctoral thesis at NTNU;2016:267, Doctoral thesis, 2016)This thesis consist of seven papers and an introduction describing the ongoing development and applications of multilevel coupled cluster theory. Coupled cluster theory is one of the most accurate, but also one of the ... -
Ni/NiO nanosheets for alkaline hydrogen evolution reaction: In situ electrochemical-Raman study
Faid, Alaa; Barnett, Alejandro Oyarce; Seland, Frode; Sunde, Svein (Journal article; Peer reviewed, 2020)Nickel/Nickel oxide (Ni/NiO) nanosheets heterostructure is a cheap and active catalyst for hydrogen evolution reaction (HER) in alkaline electrolytes. However, the reason for this activity is still under debate. Herein ... -
Nickel based-catalysts for anion exchange membrane water electrolysis: Electrochemical measurements, Raman spectroscopy, and electrolyzer performance
Faid, Alaa Yahia Abulgheit Abdulmutallab (Doctoral theses at NTNU;2020:269, Doctoral thesis, 2020)Hydrogen is an energy carrier, feedstock, industrial process gas, and alternative transportation fuel. Low-temperature water electrolysis, the splitting of water into its constituent gases hydrogen and oxygen by the means ... -
NiCu mixed metal oxide catalyst for alkaline hydrogen evolution in anion exchange membrane water electrolysis
Faid, Alaa; Barnett, Alejandro Oyarce; Seland, Frode; Sunde, Svein (Peer reviewed; Journal article, 2021)We report on the optimization of nickel-copper catalysts for superior performance as a cathode catalyst in anion exchange membrane (AEM) water electrolysis. The bifunctional system of NiCu mixed metal oxide (MMO) nanosheets ... -
NiFeB anode catalyst for anion exchange membrane water electrolysis
Faid, Alaa Yahia Abulgheit A.; Sunde, Svein (Peer reviewed; Journal article, 2022)In this work, the Ni2Fe1B oxygen evolution reaction (OER) catalyst was scaled up to 5 g per batch and tested as an anode electrode in anion exchange membrane electrolysis. The Ni2Fe1B membrane electrode assemblies (MEAs) ... -
Numerical modelling and photo-electrochemical characterization of dye sensitized solar cells
Hadler-Jacobsen, Jacob (Master thesis, 2017)Current-potential characteristics were recorded, and intensity modulated photocurrent spectroscopy (IMPS), intensity modulated photovoltage spectroscopy (IMVS), and electrochemical impedance spectroscopy (EIS) was performed ... -
Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis
Faid, Alaa; Barnett, Alejandro Oyarce; Seland, Frode; Sunde, Svein (Journal article; Peer reviewed, 2019)Ni and Ni-doped with transition metals (TM) such as Fe and Co represent the most suitable electrodes for hydrogen evolution reaction (HER) in alkaline media. Various compositions of co-precipitated Ni1 + xFe2 − xO4 and Ni1 ... -
Optimum scavenger concentrations for sonochemical nanoparticle synthesis
Hansen, Henrik Erring; Seland, Frode; Sunde, Svein; Burheim, Odne Stokke; Pollet, Bruno (Journal article; Peer reviewed, 2023)Maintaining nanoparticle properties when scaling up a chemical synthesis is challenging due to the complex interplay between reducing agents and precursors. A sonochemical synthesis route does not require the addition of ...