Sökning: "vattenoxidation"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet vattenoxidation.

1. 1. (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

3. 2. Secondary Interactions in Symmetric Double Bond Formation Catalysed by Molecular Ruthenium Complexes

   Författare :Oleksandr Kravchenko; Licheng Sun; Roger Alberto; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; homogeneous catalysis; transition metal catalysis; ruthenium catalyst; olefin metathesis; dynamic covalent chemistry; water oxidation; solar fuels; Ru-bda; secondary interactions; hydrophobic interactions; π-π stacking; homogen katalys; övergångsmetallkatalys; rutheniumkatalysator; olefinmetates; dynamisk kovalent kemi; vattenoxidation; solbränslen; Ru-bda; sekundära interaktioner; hydrofoba interaktioner; π-π stapling; Kemi; Chemistry;

   Sammanfattning : Chemistry has a tremendous impact on everyone’s life, although society does not always realize its power and ubiquity. In recent years, improved economy and sustainability of chemical processes has become a worldwide priority. LÄS MER

4. 3. Towards Artificial Photosynthesis: Exploration of Efficient First-Row Transition Metal-Based Water Oxidation Catalysts

   Författare :Lizhou Fan; Licheng Sun; Thomas Wågberg; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Artificial photosynthesis; Water oxidation; Heterogeneous catalyst; Electrochemistry; Electronic structure; Kemi; Chemistry;

   Sammanfattning : Artificial photosynthesis provides a promising strategy for sustainable energy harvesting, yet its overall efficiency is limited by the water oxidation reaction. The subject of this thesis focuses on the exploration of highly efficient cost-effective heterogeneous catalysts for water oxidation, and the investigation of essential catalyst structure-activity relationships. LÄS MER

5. 4. Outer Coordination Spheres Engineering of Ru-based Molecular Water Oxidation Catalysts

   Författare :Tianqi Liu; Licheng Sun; Julio Lloret-Fillol; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; solar fuels; water oxidation; catalysis; ruthenium complex; Ru-bda; Ru-pda; outer coordination sphere; hydrophobic interactions; Kemi; Chemistry;

   Sammanfattning : The outer coordination sphere plays a vital role in metalloenzyme catalysis, while this principle is relatively less considered in the design of man-made molecular catalysts. This thesis investigates the role of outer coordination spheres in water oxidation by a series of ruthenium-based complexes. LÄS MER

7. 5. Surface Engineering of BiVO4-based Photoelectrochemical Cells for Water Splitting

   Författare :Qijun Meng; Licheng Sun; Jae Sung Lee; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photoelectrochemical water splitting; photoanodes; bismuth vanadate; surface engineering; Kemi; Chemistry;

   Sammanfattning : Photoelectrochemical (PEC) water splitting is a promising technology for converting solar energy into green hydrogen. The development of highly efficient, robust and cost-effective photoanodes has been established to be of essential importance for PEC water oxidation. LÄS MER