Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675482
Title: Low cost and high performance novel catalysts for direct alcohol alkaline fuel cells using bio-fuels
Author: Ping, Wang
ISNI:       0000 0004 5371 3469
Awarding Body: Queen's University Belfast
Current Institution: Queen's University Belfast
Date of Award: 2014
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Abstract:
Alcohol electrooxidation reactions in alkaline media are of great significance in fuel cell development. In this thesis, catalysts with high activity and stability performance are designed and relevant mechanisms are preliminarily proposed for alcohol electrooxidation reactions. Relevant characterisations of Pd-based electrocatalysts were achieved to study the morphology and composition such as SEM, TEM, EDS and XRD. Tetrahexahedral (THH) Pd nanocrystals (NCs) were directly electrodeposited on the glassy carbon (GC) electrode via a square-wave programme. The synthesized THH Pd NCs exhibit higher activity than bulk Pd for alcohol (ethanol, methanol and ethylene glycol) electrooxidation reaction. The kinetics data were obtained by Arrhenius plots and compared between bulk Pd and THH Pd NCs. Bi adatoms were modified on THH Pd NCs for ethanol electrooxidation reaction (EOR) in alkaline medium at various temperatures and under other conditions that practical fuel cells operate. The general kinetics data of EOR on Bi-decorated and bare THH Pd NCs have also I been obtained, from the activation energy calculated based on Arrhenius plots, and compared. Pd-ATO Ti mesh with high activity and cyclic stability was tested for EOR in alkaline media. The morphology and crystalline structure of Pd-ATO Ti mesh were investigated by SEM and XRD. PdMn02- C with high activity performance was explored for methanol electrooxiation (MOR) in alkaline media. Pd-Mn02-C was obtained by hydrothermal method and its morphology was investigated by TEM. Our work has explored novel catalysts for alcohol electrooxidation in alkaline media and investigated kinetics data in order to infer reaction mechanism. It is hoped that all these work could have a little help for fuel cell development.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.675482  DOI: Not available
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