DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Chang-Hyuck | ko |
dc.contributor.author | Park, Sung-Hyeon | ko |
dc.contributor.author | Woo, Seong-Ihl | ko |
dc.date.accessioned | 2013-03-12T18:53:26Z | - |
dc.date.available | 2013-03-12T18:53:26Z | - |
dc.date.created | 2012-10-30 | - |
dc.date.created | 2012-10-30 | - |
dc.date.issued | 2012-08 | - |
dc.identifier.citation | ACS NANO, v.6, no.8, pp.7084 - 7091 | - |
dc.identifier.issn | 1936-0851 | - |
dc.identifier.uri | http://hdl.handle.net/10203/103197 | - |
dc.description.abstract | N-doped carbon, a promising alternative to Pt catalyst for oxygen reduction reactions (ORRs) in acidic media, is modified in order to increase its catalytic activity through the additional doping of B and Pat the carbon growth step. This additional doping alters the electrical, physical, and morphological properties of the carbon. The B-doping reinforces the sp(2)-structure of graphite and increases the portion of pyridinic-N sites in the carbon lattice, whereas P-doping enhances the charge delocalization of the carbon atoms and produces carbon structures with many edge sites. These electrical and physical alternations of the N-doped carbon are more favorable for the reduction of the oxygen on the carbon surface. Compared with N-doped carbon, B,N-doped or P,N-doped carbon shows 1.2 or 2.1 times higher ORR activity at 0.6 V (vs RHE) in acidic media. The most active catalyst In the reaction is the ternary-doped carbon (B,P,N-doped carbon), which records -6.0 mA/mg of mass activity at 0.6V (vs RHE), and it is 2.3 times higher than that of the N-doped carbon. These results imply that the binary or ternary doping of B and P with N into carbon induces remarkable performance enhancements, and the charge delocalization of the carbon atoms or number of edge sites of the carbon is a significant factor in deciding the oxygen reduction activity in carbon-based catalysts. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | METAL-FREE ELECTROCATALYSTS | - |
dc.subject | ELECTROLYTE FUEL-CELLS | - |
dc.subject | X-RAY PHOTOELECTRON | - |
dc.subject | CATHODE CATALYSTS | - |
dc.subject | NANOTUBES | - |
dc.subject | SPECTROSCOPY | - |
dc.subject | IRON | - |
dc.subject | POLYANILINE | - |
dc.subject | SITES | - |
dc.subject | NI | - |
dc.title | Binary and Ternary Doping of Nitrogen, Boron, and Phosphorus into Carbon for Enhancing Electrochemical Oxygen Reduction Activity | - |
dc.type | Article | - |
dc.identifier.wosid | 000307988900066 | - |
dc.identifier.scopusid | 2-s2.0-84865589422 | - |
dc.type.rims | ART | - |
dc.citation.volume | 6 | - |
dc.citation.issue | 8 | - |
dc.citation.beginningpage | 7084 | - |
dc.citation.endingpage | 7091 | - |
dc.citation.publicationname | ACS NANO | - |
dc.identifier.doi | 10.1021/nn3021234 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Woo, Seong-Ihl | - |
dc.contributor.nonIdAuthor | Park, Sung-Hyeon | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | oxygen reduction reactions | - |
dc.subject.keywordAuthor | nitrogen | - |
dc.subject.keywordAuthor | boron | - |
dc.subject.keywordAuthor | phosphorus | - |
dc.subject.keywordAuthor | carbon doping | - |
dc.subject.keywordPlus | METAL-FREE ELECTROCATALYSTS | - |
dc.subject.keywordPlus | ELECTROLYTE FUEL-CELLS | - |
dc.subject.keywordPlus | X-RAY PHOTOELECTRON | - |
dc.subject.keywordPlus | CATHODE CATALYSTS | - |
dc.subject.keywordPlus | NANOTUBES | - |
dc.subject.keywordPlus | SPECTROSCOPY | - |
dc.subject.keywordPlus | IRON | - |
dc.subject.keywordPlus | POLYANILINE | - |
dc.subject.keywordPlus | SITES | - |
dc.subject.keywordPlus | NI | - |
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