A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles

A solid oxide fuel cell (SOFC) is a solid device for electrochemically converting the chemical energy of a fuel into electrical energy without conventional combustion of the fuel. SOFCs have several advantages over other types of fuel cells, including high conversion efficiency, low sensitivity to i...

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Main Author: Alireza Babaei
Other Authors: Jiang San Ping
Format: Theses and Dissertations
Language:English
Published: 2011
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Online Access:https://hdl.handle.net/10356/46281
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-462812023-03-11T17:50:28Z A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles Alireza Babaei Jiang San Ping Liu Erjia School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Alternative, renewable energy sources A solid oxide fuel cell (SOFC) is a solid device for electrochemically converting the chemical energy of a fuel into electrical energy without conventional combustion of the fuel. SOFCs have several advantages over other types of fuel cells, including high conversion efficiency, low sensitivity to impurities in fuels and fuel flexibility. The high operating temperature (600-1000ºC) of SOFCs enables the use of not only hydrogen but also hydrocarbons as fuels. Direct utilization of hydrocarbon fuels without pre-reforming greatly reduces the complexity and cost of fuel cell systems. The imperative for direct use of hydrocarbons is the anode materials that should have high catalytic activity for hydrocarbon oxidation reactions and, at the same time, high resistance and tolerance towards the formation of coke and sulfur poisoning on the electrode surfaces. The performance of a SOFC can be improved significantly by addition of a catalyst to the electrodes. The objective of this PhD research is to investigate the mechanisms and kinetics of chemical and electrochemical reactions occurring over SOFC electrodes catalyzed by palladium (Pd) nano particles with the emphasis on the hydrocarbon oxidation reactions. For this purpose the Pd nano particles were introduced into the microstructures of the Ni/GDC and LCCM/GDC anode and LSM cathode electrodes of the SOFCs. The loading of the Pd nano particles was incrementally increased in the microstructures of the electrodes by using a wet impregnation technique. The effects of the presence of Pd nano particles on the oxidation reactions of hydrogen, methane, methanol and ethanol over the anodes and the oxygen reduction reactions over the cathodes were investigated by means of various analytical techniques including electrochemical methods over a temperature range of 650-900ºC. DOCTOR OF PHILOSOPHY (MAE) 2011-11-28T06:02:03Z 2011-11-28T06:02:03Z 2011 2011 Thesis Alireza, B. (2011). A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/46281 10.32657/10356/46281 en 211 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Alternative, renewable energy sources
spellingShingle DRNTU::Engineering::Mechanical engineering::Alternative, renewable energy sources
Alireza Babaei
A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles
description A solid oxide fuel cell (SOFC) is a solid device for electrochemically converting the chemical energy of a fuel into electrical energy without conventional combustion of the fuel. SOFCs have several advantages over other types of fuel cells, including high conversion efficiency, low sensitivity to impurities in fuels and fuel flexibility. The high operating temperature (600-1000ºC) of SOFCs enables the use of not only hydrogen but also hydrocarbons as fuels. Direct utilization of hydrocarbon fuels without pre-reforming greatly reduces the complexity and cost of fuel cell systems. The imperative for direct use of hydrocarbons is the anode materials that should have high catalytic activity for hydrocarbon oxidation reactions and, at the same time, high resistance and tolerance towards the formation of coke and sulfur poisoning on the electrode surfaces. The performance of a SOFC can be improved significantly by addition of a catalyst to the electrodes. The objective of this PhD research is to investigate the mechanisms and kinetics of chemical and electrochemical reactions occurring over SOFC electrodes catalyzed by palladium (Pd) nano particles with the emphasis on the hydrocarbon oxidation reactions. For this purpose the Pd nano particles were introduced into the microstructures of the Ni/GDC and LCCM/GDC anode and LSM cathode electrodes of the SOFCs. The loading of the Pd nano particles was incrementally increased in the microstructures of the electrodes by using a wet impregnation technique. The effects of the presence of Pd nano particles on the oxidation reactions of hydrogen, methane, methanol and ethanol over the anodes and the oxygen reduction reactions over the cathodes were investigated by means of various analytical techniques including electrochemical methods over a temperature range of 650-900ºC.
author2 Jiang San Ping
author_facet Jiang San Ping
Alireza Babaei
format Theses and Dissertations
author Alireza Babaei
author_sort Alireza Babaei
title A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles
title_short A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles
title_full A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles
title_fullStr A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles
title_full_unstemmed A mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles
title_sort mechanistic investigation of fuel oxidation reactions on the solid oxide fuel cell electrodes by using palladium catalyst nanoparticles
publishDate 2011
url https://hdl.handle.net/10356/46281
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