Blar i Institutt for materialteknologi på tidsskrift "Physical Chemistry, Chemical Physics - PCCP"
Viser treff 1-20 av 21
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Alkaline manganese electrochemistry studied by in situ and operando spectropscopic methods - metal dissolution, oxide formation and oxygen evolution
(Journal article; Peer reviewed, 2019)Manganese-based systems are considered as candidate electrocatalysts for the electrochemical oxygen evolution reaction (OER), because of their abundance in biochemical oxygen producing catalyst systems. In this work, the ... -
Charge transfer quantification in a SnOx/CuPc semiconductor heterostructure: investigation of buried interface energy structure by photoelectron spectroscopies
(Journal article; Peer reviewed, 2017)A tin oxide/copper phthalocyanine (CuPc) layer stack was investigated with two complementary photoemission methods. Non-destructive analysis of the electronic properties at the SnOx/CuPc interface was performed applying ... -
Chemical tracer diffusion of Sr and Co in polycrystalline Ca-deficient CaMnO3-δ with CaMn2O4 precipitates
(Journal article; Peer reviewed, 2018)Diffusivity on the A- and B-site of polycrystalline perovskite CaMnO3-δ with Ca deficiency and spinel CaMn2O4 (marokite) as a secondary phase was studied using chemical tracers and secondary ion mass spectrometry (SIMS) ... -
Controlling amphipathic peptide adsorption by smart switchable germanium interfaces
(Journal article; Peer reviewed, 2022)The in situ control of reversible protein adsorption to a surface is a critical step towards biofouling prevention and finds utilisation in bioanalytical applications. In this work, adsorption of peptides is controlled by ... -
The effect of cation size on structure and properties of Ba-based tetragonal tungsten bronzes Ba4M2Nb10O30 (M = Na, K or Rb) and Ba4M2Nb8Ti2O30 (M = Ca or Sr)†
(Peer reviewed; Journal article, 2024)The second largest family of oxide ferroelectrics, after perovskites, are the tetragonal tungsten bronzes (TTB) with the general formula A24A12C4B12B28O30. Cation disorder in TTBs is known to occur if the size difference ... -
Electrical conductivity and thermopower of (1-x) BiFeO3 - xBi(0.5)K(0.5)TiO(3) (x=0.1, 0.2) ceramics near the ferroelectric to paraelectric phase transition
(Journal article; Peer reviewed, 2015)Ferroelectric BiFeO3 has attractive properties such as high strain and polarization, but a wide range of applications of bulk BiFeO3 are hindered due to high leakage currents and a high coercive electric field. Here, we ... -
Electrode potential dependent desolvation and resolvation of germanium(100) in contact with aqueous perchlorate electrolytes
(Journal article; Peer reviewed, 2017)The electrode potential dependence of the hydration layer on an n-Ge(100) surface was studied by a combination of in situ and operando electrochemical attenuated total reflection infrared (ATR-IR) spectroscopy and real ... -
Electronic properties of reduced molybdenum oxides
(Journal article; Peer reviewed, 2017)The electronic properties of MoO3 and reduced molybdenum oxide phases are studied by density functional theory (DFT) alongside characterization of mixed phase MoOx films. Molybdenum oxide is utilized in compositions ranging ... -
Mechanism of the potential-triggered surface transformation of germanium in acidic medium studied by ATR-IR spectroscopy
(Journal article; Peer reviewed, 2016)In acidic solution, germanium surfaces undergo a transformation to hydrogen-terminated surfaces at sufficiently negative electrode potentials. Herein, we used in situ and operando attenuated total reflection infrared ... -
Operando studies of Mn oxide based electrocatalysts for the oxygen evolution reaction
(Peer reviewed; Journal article, 2023)Inspired by photosystem II (PS II), Mn oxide based electrocatalysts have been repeatedly investigated as catalysts for the electrochemical oxygen evolution reaction (OER), the anodic reaction in water electrolysis. However, ... -
Oxide – organic heterostructures: a case study of charge displacement absence at a SnO2 – copper phthalocyanine buried interface
(Journal article; Peer reviewed, 2018)Reduced tin dioxide/copper phthalocyanine (SnOx/CuPc) heterojunctions recently gained much attention in hybrid electronics due to their defect structure, allowing tuning of the electronic properties at the interface towards ... -
Revealing the Slow Decomposition Kinetics of Type-I clathrate Ba8Ga16Ge30
(Journal article; Peer reviewed, 2017)Inconsistencies in high temperature thermoelectric property measurements of Ba8Ga16Ge30 have prompted our study on the thermal stability of this heavily studied inorganic clathrate. Using X-ray diffraction, thermal analysis, ... -
Role of aluminium hydrides in localised corrosion of aluminium revealed by operando Raman spectroscopy
(Peer reviewed; Journal article, 2023)Filiform corrosion (FFC) is characteristic of metals such as aluminium and magnesium, usually takes place on coated metals, and spreads from coating defects in the form of filaments with a width on the order of 100 μm. In ... -
Size and shape effects on the thermodynamic properties of nanoscale volumes of water
(Journal article; Peer reviewed, 2017)Small systems are known to deviate from the classical thermodynamic description, among other things due to their large surface area to volume ratio compared to corresponding big systems. As a consequence, extensive ... -
Strategies for the analysis of the elemental metal fraction of Ir and Ru oxides via XRD, XANES, and EXAFS
(Peer reviewed; Journal article, 2019)Iridium and ruthenium oxide are active electrocatalysts for oxygen evolution. The relation between preparation method, structure, and behavior of mixed oxides of iridium and ruthenium are of interest in order to obtain ... -
Structure, electrical conductivity and oxygen transport properties of perovskite-type oxides CaMn1−x−yTixFeyO3−δ
(Journal article; Peer reviewed, 2019)Calcium manganite-based perovskite-type oxides hold promise for application in chemical looping combustion processes and oxygen transport membranes. In this study, we have investigated the structure, electrical conductivity ... -
The Reassigned Pseudo Wigner-Ville Transform in Electrochemical Noise Analysis
(Journal article; Peer reviewed, 2019)Several different time–frequency transforms from signal processing were used to analyze electrochemical noise data to determine frequency components contained within the noise record and their time evolution. Bilinear ... -
Thermo-osmotic pressure and resistance to mass transport in a vapor-gap membrane
(Peer reviewed; Journal article, 2021)We have investigated the transport of fluid through a vapor-gap membrane. The transport due to a membrane temperature difference was investigated under isobaric as well as non-isobaric conditions. Such a concept is relevant ... -
Tracer diffusion of 96Zr and 134Ba in polycrystalline BaZrO3
(Journal article; Peer reviewed, 2017)Cation tracer diffusion in polycrystalline cubic BaZrO3 perovskites was studied using the stable isotopes 134Ba and 96Zr in air at 1015–1200 and 1300–1500 °C, respectively. Thin films of 134BaO and 96ZrO2 were deposited ... -
What is the trigger for the hydrogen evolution reaction? – towards electrocatalysis beyond the Sabatier principle
(Peer reviewed; Journal article, 2020)The mechanism of the hydrogen evolution reaction, although intensively studied for more than a century, remains a fundamental scientific challenge. Many important questions are still open, making it elusive to establish ...