A Study on Catalysis and Electrolyte Engineering for H2/O2 Electrochemical Reactions

Handle URI:
http://hdl.handle.net/10754/620977
Title:
A Study on Catalysis and Electrolyte Engineering for H2/O2 Electrochemical Reactions
Authors:
Shinagawa, Tatsuya ( 0000-0002-5240-7342 )
Abstract:
Water electrolysis conjugated with renewable energy sources potentially realizes a sustainable society. Although the current electrolyzers operate at extreme pH to maximize the electrolysis efficiency, near-neutral pH conditions may optimize the overall system operation when conjugated with renewable energy sources. In this context, a study on the electrolysis in the mild conditions is essential. The dissertation investigates the water electrolysis in various conditions, with a particular focus placed on milder conditions, to rationalize and improve its performance. Microkinetic analysis was performed for the cathodic half-reaction in conjugation with mass transport evaluation using various electrode materials. The analysis revealed a significant universal influence of electrolyte properties on the reaction performances at near-neutral pH. Investigation of the associated electrolyte properties (ion size, viscosity and activity/fugacity) rationally optimized the reaction conditions. Together with the separately performed studies on the anodic half-reaction and system configurations, the finding was successfully transferred to electrocatalytic and solar-driven water splitting systems. The presented herein is a fundamental yet crucial aspect of water electrolysis, which can advance the water electrolysis for the future.
Advisors:
Takanabe, Kazuhiro ( 0000-0001-5374-9451 )
Committee Member:
Cavallo, Luigi ( 0000-0002-1398-338X ) ; Mishra, Himanshu ( 0000-0001-8759-7812 ) ; Koper, Marc
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Program:
Chemical Sciences
Issue Date:
27-Sep-2016
Type:
Dissertation
Appears in Collections:
Dissertations

Full metadata record

DC FieldValue Language
dc.contributor.advisorTakanabe, Kazuhiroen
dc.contributor.authorShinagawa, Tatsuyaen
dc.date.accessioned2016-10-13T08:47:22Z-
dc.date.available2016-10-13T08:47:22Z-
dc.date.issued2016-09-27-
dc.identifier.urihttp://hdl.handle.net/10754/620977-
dc.description.abstractWater electrolysis conjugated with renewable energy sources potentially realizes a sustainable society. Although the current electrolyzers operate at extreme pH to maximize the electrolysis efficiency, near-neutral pH conditions may optimize the overall system operation when conjugated with renewable energy sources. In this context, a study on the electrolysis in the mild conditions is essential. The dissertation investigates the water electrolysis in various conditions, with a particular focus placed on milder conditions, to rationalize and improve its performance. Microkinetic analysis was performed for the cathodic half-reaction in conjugation with mass transport evaluation using various electrode materials. The analysis revealed a significant universal influence of electrolyte properties on the reaction performances at near-neutral pH. Investigation of the associated electrolyte properties (ion size, viscosity and activity/fugacity) rationally optimized the reaction conditions. Together with the separately performed studies on the anodic half-reaction and system configurations, the finding was successfully transferred to electrocatalytic and solar-driven water splitting systems. The presented herein is a fundamental yet crucial aspect of water electrolysis, which can advance the water electrolysis for the future.en
dc.language.isoenen
dc.subjectElectrocatalysisen
dc.subjectWater Splittingen
dc.subjectSolar Energyen
dc.subjectFuel Cellsen
dc.titleA Study on Catalysis and Electrolyte Engineering for H2/O2 Electrochemical Reactionsen
dc.typeDissertationen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
thesis.degree.grantorKing Abdullah University of Science and Technologyen_GB
dc.contributor.committeememberCavallo, Luigien
dc.contributor.committeememberMishra, Himanshuen
dc.contributor.committeememberKoper, Marcen
thesis.degree.disciplineChemical Sciencesen
thesis.degree.nameDoctor of Philosophyen
dc.person.id129085en
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