DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Ji Yong | ko |
dc.contributor.author | Jeong, Da-Hyi | ko |
dc.contributor.author | Lee, Seon Joo | ko |
dc.contributor.author | Kang, Dong-Gu | ko |
dc.contributor.author | Kim, Sang-Kyu | ko |
dc.contributor.author | Narn, Ki Min | ko |
dc.contributor.author | Song, Hyunjoon | ko |
dc.date.accessioned | 2017-10-23T01:55:59Z | - |
dc.date.available | 2017-10-23T01:55:59Z | - |
dc.date.created | 2017-10-10 | - |
dc.date.created | 2017-10-10 | - |
dc.date.issued | 2017-09 | - |
dc.identifier.citation | NANO LETTERS, v.17, no.9, pp.5688 - 5694 | - |
dc.identifier.issn | 1530-6984 | - |
dc.identifier.uri | http://hdl.handle.net/10203/226413 | - |
dc.description.abstract | Semiconductor-metal hybrid nanostructures are one of the best model catalysts for understanding photocatalytic hydrogen generation. To investigate the optimal structure of metal cocatalysts, metal-CdSe-metal nanodumbbells were synthesized with three distinct sets of metal tips, Pt-CdSe-Pt, Au-CdSe-Au, and Au-CdSe-Pt. Photoelectrochemical responses and transient absorption spectra showed that the competition between the charge recombination at the metal CdSe interface and the water reduction on the metal surface is a detrimental factor for the apparent hydrogen evolution rate. For instance, a large recombination rate (k(rec)) at the Pt CdSe interface limits the quantum yield of hydrogen generation despite a superior water reduction rate (k(WR)) on the Pt surface. To suppress the recombination process, Pt was selectively deposited onto the Au tips of Au-CdSe-Au nanodumbbells in which the krec was diminished at the Au-CdSe interface, and the large k(WR) was maintained on the Pt surface. As a result, the optimal structure of the Pt -coated Au-CdSe-Au nanodumbbells reached a quantum yield of 4.84%. These findings successfully demonstrate that the rational design of a metal cocatalyst and metal-semiconductor interface can additionally enhance the catalytic performance of the photochemical hydrogen generation reactions. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | PHOTOCATALYTIC H-2 GENERATION | - |
dc.subject | FERMI-LEVEL EQUILIBRATION | - |
dc.subject | DECORATED CDS NANORODS | - |
dc.subject | HYDROGEN-PRODUCTION | - |
dc.subject | ELECTRON-TRANSFER | - |
dc.subject | QUANTUM RODS | - |
dc.subject | HETEROSTRUCTURES | - |
dc.subject | WATER | - |
dc.subject | NANOPARTICLES | - |
dc.subject | NANOCRYSTALS | - |
dc.title | Engineering Reaction Kinetics by Tailoring the Metal Tips of Metal Semiconductor Nanodumbbells | - |
dc.type | Article | - |
dc.identifier.wosid | 000411043500075 | - |
dc.identifier.scopusid | 2-s2.0-85029524583 | - |
dc.type.rims | ART | - |
dc.citation.volume | 17 | - |
dc.citation.issue | 9 | - |
dc.citation.beginningpage | 5688 | - |
dc.citation.endingpage | 5694 | - |
dc.citation.publicationname | NANO LETTERS | - |
dc.identifier.doi | 10.1021/acs.nanolett.7b02582 | - |
dc.contributor.localauthor | Kim, Sang-Kyu | - |
dc.contributor.localauthor | Song, Hyunjoon | - |
dc.contributor.nonIdAuthor | Lee, Seon Joo | - |
dc.contributor.nonIdAuthor | Kang, Dong-Gu | - |
dc.contributor.nonIdAuthor | Narn, Ki Min | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Nanoparticles | - |
dc.subject.keywordAuthor | photocatalyst | - |
dc.subject.keywordAuthor | hydrogen generation | - |
dc.subject.keywordAuthor | metal cocatalyst | - |
dc.subject.keywordAuthor | charge recombination | - |
dc.subject.keywordPlus | PHOTOCATALYTIC H-2 GENERATION | - |
dc.subject.keywordPlus | FERMI-LEVEL EQUILIBRATION | - |
dc.subject.keywordPlus | DECORATED CDS NANORODS | - |
dc.subject.keywordPlus | HYDROGEN-PRODUCTION | - |
dc.subject.keywordPlus | ELECTRON-TRANSFER | - |
dc.subject.keywordPlus | QUANTUM RODS | - |
dc.subject.keywordPlus | HETEROSTRUCTURES | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | NANOCRYSTALS | - |
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