Search for dissertations about: "Co3O4"

Showing result 1 - 5 of 13 swedish dissertations containing the word Co3O4.

  1. 1. Probing Atomic Scale Structure and Catalytic Properties of Cobalt Oxide Model Catalysts

    University dissertation from Lund University, Faculty of Science, Department of Physics, Division of Synchrotron Radiation Research

    Author : Alif Arman; [2016-12]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; catalysis; model systems; Co3O4 111 ; Co3O4 100 ; CoO 111 ; X-ray photoelectron spectroscopy; Scanning tunneling microscopy; Fysicumarkivet A:2017:Arman;

    Abstract : Cobalt oxides are known to be active catalysts for a number of chemical reactions, but very little is known about the atomic scale processesresponsible for the activity. The research presented in this thesis is focused on obtaining an atomic scale understanding of the chemistry of wellcharacterizedcobalt oxide model catalyst surfaces consisting of pristine and defective CoO and Co3O4 thin films with the (111) and (100)terminations supported by Ag(100), Ir(100), and Au(111) single crystal surfaces. READ MORE

  2. 2. Aqueous Processing of WC-Co Powders Aqueous processing of WC-Co powders

    University dissertation from Stockholm : Materialvetenskap

    Author : Karin Andersson; KTH.; [2001]
    Keywords : Hard metal; cemented carbide; WC-Co; tungsten oxide; tungsten carbide; oxidation; cobalt; dissolution; surface complexation; XPS; AFM; colloidal probe; force curve; Hamaker constant; Cauchy; WO3; CoOOH; CoO; Co3O4; ESCA; zeta-potential; surface poten;

    Abstract : The object of this work is toobtain a fundamental understanding of the principal issuesconcerning the handling of WC-Co powders, in an aqueousmedium.The oxidation and dissolution oftungsten carbide powder dispersed in water was investigatedusing X-ray Photoelectron Spectroscopy (XPS) and leachingstudies. READ MORE

  3. 3. Synthesis, Characterization and Applications of Metal Oxide Nanostructures

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Mushtaque Hussain; Linköpings universitet.; Linköpings universitet.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aqueous chemical growth method; ZnO nanorods; Oxygen plasma treatment; Piezoelectric and mechanical properties; Atomic force microscope; Nanoindentation; Co3O4 nanostructures; Anions effect; pH sensor; NiCo2O4 nanostructures; Glucose sensor;

    Abstract : The main objective of nanotechnology is to build self-powered nanosystems that are ultrasmall in size, exhibit super sensitivity, extraordinary multi functionality, and extremely low power consumption. As we all know that 21st century has brought two most important challenges for us. One is energy shortage and the other is global warming. READ MORE

  4. 4. Electrochemical water splitting based on metal oxide composite nanostructures

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Aneela Tahira; Omer Nur; Magnus Willander; Rasit Turan; [2020]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Composite metal oxides; hydrothermal method; water splitting; Tafel slope; stability; durability; alkaline media; acidic media;

    Abstract : The occurrence of available energy reservoirs is decreasing steeply, therefore we are looking for an alternative and sustainable renewable energy resources. Among them, hydrogen is considered as green fuel with a high density of energy. READ MORE

  5. 5. First-Principles Studies of Materials Properties Pressure-Induced Phase Transitions & Functional Materials

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Thanayut Kaewmaraya; Uppsala universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Density functional theory; Pressure-induced phase transitions; Ab-initio molecular dynamic; hybrid functional; Ab-initio random structure searching; Phase change material; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : This thesis presents the first-principles studies of materials properties within the framework of the density functional theory (DFT). The thesis constitutes three main parts, i. e., pressure-induced phase transitions in solids, data-storage and clean-energy materials. READ MORE