Search for dissertations about: "Electrochemical Reactions in Polymer Electrolyte Fuel Cells"

Showing result 1 - 5 of 9 swedish dissertations containing the words Electrochemical Reactions in Polymer Electrolyte Fuel Cells.

2. 1. Electrochemical Reactions in Polymer Electrolyte Fuel Cells

   Author : Maria Wesselmark; Svein Sunde; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel cell; model electrodes; oxygen reduction; methanol oxidation; formic acid oxidation; hydrogen oxidation; CO oxidation; degradation; tungsten oxide; carbon support; Bränslecell; modellelektroder; syrgasreduktion; metanoloxidation; myrsyraoxidation; vätgasoxidation; CO oxidation; degradering; wolfram oxid; kolsupport; Chemical engineering; Kemiteknik;

   Abstract : The polymer electrolyte fuel cell converts the chemical energy in a fuel, e.g. hydrogen or methanol, and oxygen into electrical energy. The high efficiency and the possibility to use fuel from renewable sources make them attractive as energy converters in future sustainable energy systems. READ MORE

4. 2. Nanostructured Fuel Cell Catalysts

   Author : Marie Gustavsson; Chalmers tekniska högskola; []
   Keywords : Nafion; thin film evaporation; model catalyst; electrocatalyst; acetic acid oxidation; oxygen reduction; colloidal lithography; PEMFC; screening; Pt; formaldehyde oxidation; methanol oxidation; nanofabrication; CO oxidation; polymer electrolyte; TiOx;

   Abstract : A long term challenge for society is to develop sustainable energy systems to reduce the dependence on fossil fuels and to decrease air pollution. This requires new alternatives regarding the supply of energy and increased efficiency of the future energy systems. Fuel cell technology is one such possible alternative. READ MORE

5. 3. Nanostructured Model Electrodes for Studies of Fuel Cell Reactions

   Author : Björn Wickman; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Oxygen Reduction; Hydrogen Oxidation; Degradation; PEMFC; Model System; Nanofabrication; Fuel Cell; Catalyst; Electrode;

   Abstract : There is currently a general need for alternative and sustainable energy systems. As part of such a system, the polymer electrolyte fuel cell (PEMFC) offers efficient and emission free energy conversion. READ MORE

6. 4. Multiphysics modelling of PEM fuel cells - with reacting transport phenomena at micro and macroscales

   Author : Munir Khan; Värmeöverföring; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; macroscale; PEM fuel cells; CFD; microscale; multiphysics; multiphase; anisotropy;

   Abstract : This thesis presents numerical simulations of reacting transport phenomena in polymer electrolyte membrane (PEM) fuel cells. Broadly, the presented work is subdivided into macro and microscale simulations. READ MORE

7. 5. Polyhydroxyalkylations for alkali-stable cationic polymers as hydroxide exchange membranes

   Author : Dong Pan; Centrum för analys och syntes; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; quaternary ammoniums; aromatic polymers; chemical resistance; ion conductivity;

   Abstract : To alleviate worldwide dependence on fossil fuels for energy production and considerably reduce CO2 emissions, green energy sources and sustainable energy solutions are in high demand. Fuel cells are environmental-friendly electrochemical devices which may use clean fuels, e.g., green hydrogen gas, to generate electricity. READ MORE