Sökning: "arbete kemi"

Visar resultat 1 - 5 av 152 avhandlingar innehållade orden arbete kemi.

  1. 1. Theoretical and Experimental Studies of Electrode and Electrolyte Processes in Industrial Electrosynthesis

    Författare :Rasmus Karlsson; Ann Cornell; Jan Rossmeisl; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Electrocatalysis; metallic oxides; ruthenium dioxide; titanium dioxide; DSA; doping; selectivity; ab initio modeling; density functional theory; Elektrokatalys; metalloxider; ruteniumdioxid; titandioxid; DSA; dopning; selektivitet; ab initio-modellering; täthetsfunktionalteori; Chemical Engineering; Kemiteknik;

    Sammanfattning : Heterogeneous electrocatalysis is the usage of solid materials to decrease the amount of energy needed to produce chemicals using electricity. It is of core importance for modern life, as it enables production of chemicals, such as chlorine gas and sodium chlorate, needed for e.g. materials and pharmaceuticals production. LÄS MER

  3. 2. From Facets to Flow: The Electrooxidation of Glycerol on Pd-based catalysts

    Författare :Jai White; Ann M. Cornell; Gunnar Henriksson; Carina Lagergren; Elena Baranova; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; glycerol; electrooxidation; palladium; nickel; alkaline; HPLC; RDE; glycerol; elektrooxidation; palladium; nickel; alkalisk; HPLC; RDE; Chemical Engineering; Kemiteknik;

    Sammanfattning : Glycerol, a by-product of biodiesel refineries, has uses in industries such as cosmetics, food, and pharmaceuticals. However, its usage is small compared to the amount of glycerol produced from biodiesel production. LÄS MER

  4. 3. (Photo)electrochemical Water Oxidation: From Catalysis to Functional Device

    Författare :Hao Yang; Licheng Sun; Marc Koper; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; artificial photosynthesis; solar fuels; water oxidation; nucleophilic attack; conjugated microporous polymer; host-guest chemistry; photoanode; perovskites; artificiell fotosyntes; solbränslen; vattenoxidation; nukleofil attack; konjugerad mikroporös polymer; värd-gästkemi; fotoanoder; perovskiter; Kemi; Chemistry;

    Sammanfattning : The key challenge within artificial photosynthesis is achieving efficient electro- or photo-driven water oxidation catalysis, a necessary process to supply the protons for the reduction reactions, thereby enabling solar fuel production. To facilitate efficient water (photo)electrolysis for solar fuel production, this thesis focuses on two aspects: 1) elucidating the O-O bond formation mechanism and developing efficient, stable, and economical water oxidation catalysts (WOCs); 2) exploring stable, low-cost, light-absorbing photoanode materials that have suitable band structures and excellent charge diffusion properties. LÄS MER

  5. 4. Water oxidation : From Molecular Systems to Functional Devices

    Författare :Quentin Daniel; Licheng Sun; Marc Robert; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Water oxidation; Renewable energy; Electrochemistry; EPR; Devices; Molecular system; Characterization; Kemi; Chemistry;

    Sammanfattning : The production of hydrogen gas, through the process of water splitting,is one of the most promising concepts for the production of clean andrenewable fuel.The introduction of this thesis provides a brief overview of fossil fuelsand the need for an energy transition towards clean and renewable energy. LÄS MER

  7. 5. A Theoretical Investigation of the Octapeptide Region in the Human Prion Protein

    Författare :Eva-Stina Riihimäki; Lars Kloo; José Manuel Martínez; Francisco Javier Luque Garriga; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; prion protein; copper; octapeptide; structure; force field parameters; coordination; non-periodic boundary conditions; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : Den kopparbindande egenskapen hos prionproteiner är sannolikt kopplad till proteinets funtion. Det mänskliga prionproteinet innehåller ett kopparbindande oktapeptidområde, där PHGGGWGQ-sekvensen upprepas fyra gånger i följd. LÄS MER