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AuthorSoldano, Germándc.contributor.author
Date of accession2016-03-15T06:24:10Zdc.date.accessioned
Available in OPARU since2016-03-15T06:24:10Zdc.date.available
Year of creation2011dc.date.created
AbstractOne of the biggest challenges of this century is to produce sustainable and environmental friendly devices that can cope with the constantly increasing energy demand. Hydrogen-oxygen fuel cells are among the most promising solutions for this issue. The common aim along this thesis is to investigate nanostructures as promising catalysts for the hydrogen evolution reaction. We started by addressing an ultimate case of the nanoscale: free-standing monoatomic nanowires. We found that on Cu and Au wires, hydrogen atoms are much more strongly adsorbed than on planar surfaces. Indeed, the adsorption of hydrogen on Cu and Au becomes exergonic on the wire. Using the Schmickler-Santos theory for the proton adsorption in water, we predict that the process is much faster on Cu and Au wires than on the corresponding planar surfaces. Therefore, Au and Cu wires promise to be good catalysts for hydrogen evolution. In the second part of my thesis we studied more stable systems: graphite-supported wires. These wires are attached to the step of graphite layers. Unfortunately, Au and Cu graphite-supported wires are not as reactive towards hydrogen as they are in the free standing form. However, Ni, Pd, and Pt supported wires seem to be as good catalysts as their planar surfaces (with the advantage that much less metal is required for catalysis.) Finally, the enhancement of the catalytic properties of Rh by its deposition on Au and Pd surfaces is studied.dc.description.abstract
Languageendc.language.iso
PublisherUniversität Ulmdc.publisher
LicenseStandarddc.rights
Link to license texthttps://oparu.uni-ulm.de/xmlui/license_v3dc.rights.uri
KeywordMetal planar surfacesdc.subject
KeywordMetallic nanowiresdc.subject
KeywordOverlayersdc.subject
Dewey Decimal GroupDDC 540 / Chemistry & allied sciencesdc.subject.ddc
LCSHCatalysisdc.subject.lcsh
LCSHHydrogen as fueldc.subject.lcsh
LCSHNanowiresdc.subject.lcsh
TitleNanowires and surface tuning: electrocatalysis at the nanoscaledc.title
Resource typeDissertationdc.type
DOIhttp://dx.doi.org/10.18725/OPARU-1946dc.identifier.doi
PPN685583597dc.identifier.ppn
URNhttp://nbn-resolving.de/urn:nbn:de:bsz:289-vts-78587dc.identifier.urn
GNDNanodrahtdc.subject.gnd
GNDOberflächenchemiedc.subject.gnd
FacultyFakultät für Naturwissenschaftenuulm.affiliationGeneral
Date of activation2012-02-13T12:40:17Zuulm.freischaltungVTS
Peer reviewneinuulm.peerReview
Shelfmark print versionW: W-H 12.850uulm.shelfmark
DCMI TypeTextuulm.typeDCMI
VTS-ID7858uulm.vtsID
CategoryPublikationenuulm.category
University Bibliographyjauulm.unibibliographie


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