BROWSE

Related Scientist

Researcher

나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
more info

Engineering Reaction Kinetics by Tailoring the Metal Tips of Metal-Semiconductor Nanodumbbells

DC Field Value Language
dc.contributor.authorJi Yong Choi-
dc.contributor.authorDahyi Jeong-
dc.contributor.authorSeon Joo Lee-
dc.contributor.authorDong-gu Kang-
dc.contributor.authorSang Kyu Kim-
dc.contributor.authorKi Min Nam-
dc.contributor.authorHyunjoon Song-
dc.date.available2017-11-10T04:53:21Z-
dc.date.created2017-10-19-
dc.date.issued2017-09-
dc.identifier.issn1530-6984-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/3981-
dc.description.abstractSemiconductor-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 (krec) at the Pt-CdSe interface limits the quantum yield of hydrogen generation despite a superior water reduction rate (kWR) 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 kWR 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. © 2017 American Chemical Society-
dc.languageENG-
dc.publisherAMER CHEMICAL SOC-
dc.titleEngineering Reaction Kinetics by Tailoring the Metal Tips of Metal-Semiconductor Nanodumbbells-
dc.typeArticle-
dc.type.rimsA-
dc.identifier.wosid000411043500075-
dc.identifier.scopusid2-s2.0-85029524583-
dc.description.wostc2-
dc.date.tcdate2018-10-01-
dc.date.scptcdate2018-10-01-
dc.subject.keywordcharge recombination-
dc.subject.keywordhydrogen generation-
dc.subject.keywordmetal cocatalyst-
dc.subject.keywordNanoparticles-
dc.subject.keywordphotocatalyst-
dc.contributor.affiliatedAuthorHyunjoon Song-
dc.identifier.bibliographicCitationNANO LETTERS, v.17, no.9, pp.5688 - 5694-
dc.description.scptc2-
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
Nano Lett. 2017, 17, 5688−5694.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse