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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 764 | - |
dc.citation.number | 5915 | - |
dc.citation.startPage | 760 | - |
dc.citation.title | SCIENCE | - |
dc.citation.volume | 323 | - |
dc.contributor.author | Gong, Kuanping | - |
dc.contributor.author | Du, Feng | - |
dc.contributor.author | Xia, Zhenhai | - |
dc.contributor.author | Durstock, Michael | - |
dc.contributor.author | Dai, Liming | - |
dc.date.accessioned | 2023-12-22T08:09:37Z | - |
dc.date.available | 2023-12-22T08:09:37Z | - |
dc.date.created | 2014-11-24 | - |
dc.date.issued | 2009-02 | - |
dc.description.abstract | The large- scale practical application of fuel cells will be difficult to realize if the expensive platinum- based electrocatalysts for oxygen reduction reactions ( ORRs) cannot be replaced by other efficient, low- cost, and stable electrodes. Here, we report that vertically aligned nitrogen- containing carbon nanotubes ( VA- NCNTs) can act as a metal- free electrode with a much better electrocatalytic activity, long- term operation stability, and tolerance to crossover effect than platinum for oxygen reduction in alkaline fuel cells. In air- saturated 0.1 molar potassium hydroxide, we observed a steady- state output potential of - 80 millivolts and a current density of 4.1 milliamps per square centimeter at - 0.22 volts, compared with - 85 millivolts and 1.1 milliamps per square centimeter at - 0.20 volts for a platinum- carbon electrode. The incorporation of electron- accepting nitrogen atoms in the conjugated nanotube carbon plane appears to impart a relatively high positive charge density on adjacent carbon atoms. This effect, coupled with aligning the NCNTs, provides a four- electron pathway for the ORR on VA- NCNTs with a superb performance. | - |
dc.identifier.bibliographicCitation | SCIENCE, v.323, no.5915, pp.760 - 764 | - |
dc.identifier.doi | 10.1126/science.1168049 | - |
dc.identifier.issn | 0036-8075 | - |
dc.identifier.scopusid | 2-s2.0-59849084114 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/9204 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=59849084114 | - |
dc.identifier.wosid | 000263066800040 | - |
dc.language | 영어 | - |
dc.publisher | AMER ASSOC ADVANCEMENT SCIENCE | - |
dc.title | Nitrogen-Doped Carbon Nanotube Arrays with High Electrocatalytic Activity for Oxygen Reduction | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | CONDUCTING POLYMERS | - |
dc.subject.keywordPlus | MODIFIED ELECTRODES | - |
dc.subject.keywordPlus | NANOCOMPOSITE | - |
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