DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chueh, William C. | ko |
dc.contributor.author | Hao, Yong | ko |
dc.contributor.author | Jung, WooChul | ko |
dc.contributor.author | Haile, Sossina M. | ko |
dc.date.accessioned | 2019-04-15T15:52:38Z | - |
dc.date.available | 2019-04-15T15:52:38Z | - |
dc.date.created | 2013-02-27 | - |
dc.date.created | 2013-02-27 | - |
dc.date.issued | 2012-02 | - |
dc.identifier.citation | NATURE MATERIALS, v.11, no.2, pp.155 - 161 | - |
dc.identifier.issn | 1476-1122 | - |
dc.identifier.uri | http://hdl.handle.net/10203/255363 | - |
dc.description.abstract | Fuel cells, and in particular solid-oxide fuel cells (SOFCs), enable high-efficiency conversion of chemical fuels into useful electrical energy and, as such, are expected to play a major role in a sustainable-energy future. A key step in the fuel-cell energy-conversion process is the electro-oxidation of the fuel at the anode. There has been increasing evidence in recent years that the presence of CeO2-based oxides (ceria) in the anodes of SOFCs with oxygen-ion-conducting electrolytes significantly lowers the activation overpotential for hydrogen oxidation. Most of these studies, however, employ porous, composite electrode structures with ill-defined geometry and uncontrolled interfacial properties. Accordingly, the means by which electrocatalysis is enhanced has remained unclear. Here we demonstrate unambiguously, through the use of ceria-metal structures with well-defined geometries and interfaces, that the near-equilibrium H-2 oxidation reaction pathway is dominated by electrocatalysis at the oxide/gas interface with minimal contributions from the oxide/metal/gas triple-phase boundaries, even for structures with reaction-site densities approaching those of commercial SOFCs. This insight points towards ceria nanostructuring as a route to enhanced activity, rather than the traditional paradigm of metal-catalyst nanostructuring. | - |
dc.language | English | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.subject | HIGH-PERFORMANCE ELECTRODE | - |
dc.subject | WATER-GAS SHIFT | - |
dc.subject | FUEL-CELL ANODE | - |
dc.subject | DOPED CERIA | - |
dc.subject | SOFC ANODES | - |
dc.subject | ELECTROCATALYSTS | - |
dc.subject | HYDROCARBONS | - |
dc.subject | SPECTROSCOPY | - |
dc.subject | LAYERS | - |
dc.title | High electrochemical activity of the oxide phase in model ceria-Pt and ceria-Ni composite anodes | - |
dc.type | Article | - |
dc.identifier.wosid | 000299428700016 | - |
dc.identifier.scopusid | 2-s2.0-84856104127 | - |
dc.type.rims | ART | - |
dc.citation.volume | 11 | - |
dc.citation.issue | 2 | - |
dc.citation.beginningpage | 155 | - |
dc.citation.endingpage | 161 | - |
dc.citation.publicationname | NATURE MATERIALS | - |
dc.identifier.doi | 10.1038/NMAT3184 | - |
dc.contributor.localauthor | Jung, WooChul | - |
dc.contributor.nonIdAuthor | Chueh, William C. | - |
dc.contributor.nonIdAuthor | Hao, Yong | - |
dc.contributor.nonIdAuthor | Haile, Sossina M. | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | HIGH-PERFORMANCE ELECTRODE | - |
dc.subject.keywordPlus | WATER-GAS SHIFT | - |
dc.subject.keywordPlus | FUEL-CELL ANODE | - |
dc.subject.keywordPlus | DOPED CERIA | - |
dc.subject.keywordPlus | SOFC ANODES | - |
dc.subject.keywordPlus | ELECTROCATALYSTS | - |
dc.subject.keywordPlus | HYDROCARBONS | - |
dc.subject.keywordPlus | SPECTROSCOPY | - |
dc.subject.keywordPlus | LAYERS | - |
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