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Title:Electrocatalysis in Alkaline Media: Mechanistic Studies of Fuel Cell Reactions on Well-Defined Model Catalysts
Author(s):Spendelow, Jacob S.
Doctoral Committee Chair(s):Kenis, Paul J.A.; Wieckowski, Andrzej
Department / Program:Chemical and Biomolecular Engineering
Discipline:Chemical and Biomolecular Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Energy
Abstract:Ru was found to promote both methanol dehydrogenation and CO oxidation on adjacent Pt sites. Ru enhances methanol dehydrogenation through two distinct ligand effects: it increases the intrinsic dehydrogenation activity of adjacent Pt sites, and it causes CO to diffuse away from these active sites, decreasing the CO poisoning effect. A Ru ligand effect also enhances CO oxidation by weakening the Pt-CO bond. Ru supplies adsorbed OH for bifunctional CO oxidation, but since Pt defects can also supply OH in alkaline media, the Ru bifunctional effect is less significant than the three ligand effects.
Issue Date:2006
Type:Text
Language:English
Description:167 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
URI:http://hdl.handle.net/2142/82388
Other Identifier(s):(MiAaPQ)AAI3243002
Date Available in IDEALS:2015-09-25
Date Deposited:2006


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