Search for dissertations about: "splitting"

Showing result 1 - 5 of 358 swedish dissertations containing the word splitting.

2. 1. Potential Electrocatalysts for Water Splitting Devices : A Journey Through the Opportunities and Challenges of Catalyst Classes

   Author : Robin N. Dürr; Leif Hammarström; Bruno Jousselme; Tomas Edvinsson; Haining Tian; Kevin Sivula; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Electrocatalysis; Electrolyzer cell; HER catalyst; OER catalyst; Water splitting; Kemi; Chemistry;

   Abstract : In this thesis work, different classes of catalysts and their suitability for integration into an electrolyzer cell has been investigated.Ruthenium based molecular catalysts have shown high activities and stabilities towards water oxidation in neutral pH. Especially the oligomeric catalysts exhibited a superior performance. READ MORE

4. 2. Wave Splitting in Direct and Inverse Scattering Problems

   Author : Mats Gustafsson; Institutionen för elektro- och informationsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maxwell equations; inverse problem; Electronics; inverse scattering; wave splitting; Elektronik;

   Abstract : The focus of this thesis is on the use of wave splitting in electromagnetic direct and inverse scattering problems. Wave splitting offers a decomposition of wave fields into appropriate input and output wave constituents. READ MORE

5. 3. Novel Algorithms for Optimal Transport via Splitting Methods

   Author : Jacob Lindbäck; Mikael Johansson; Jérôme Malick; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; optimal transport; splitting methods; Optimeringslära och systemteori; Optimization and Systems Theory;

   Abstract : This thesis studies how the Douglas–Rachford splitting technique can be leveraged for scalable computational optimal transport (OT). By carefully splitting the problem, we derive an algorithm with several advantages. READ MORE

6. 4. Water splitting in natural and artificial photosynthetic systems

   Author : Sergey Koroidov; Johannes Messinger; Richard J. Debus; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Water splitting; photosystem II; artificial catalyst; MIMS; inorganic carbon;

   Abstract : Photosynthesis is the unique biological process that converts carbon dioxide into organic compounds, for example sugars, using the energy of sunlight. Thereby solar energy is converted into chemical energy. Nearly all life depends on this reaction, either directly, or indirectly as the ultimate source of their food. READ MORE

7. 5. Plasma spray coatings as catalysts for water splitting : exploring novel materials and strategies

   Author : Xiuyu Wu; Eduardo Gracia-Espino; Juan Carlos Nieves Sanchez; Björn Wickman; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Plasma spray; water splitting; coatings; electrocatalyst; hydrogen evolution reaction; oxygen evolution reaction; Physical Chemistry; fysikalisk kemi;

   Abstract : Today, fossil fuels still play a dominant role in the global energy systems. However, they are depleting quickly and the combustion of them causes many environmental concerns, including global warming, air pollution, ozone layer depletion, and acid rain. READ MORE