Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이성철 | - |
dc.date.accessioned | 2019-12-02T04:48:15Z | - |
dc.date.available | 2019-12-02T04:48:15Z | - |
dc.date.issued | 2017-11 | - |
dc.identifier.citation | SCIENCE CHINA-MATERIALS, v. 60, no. 11, page. 1109-1120, Special no. SI | en_US |
dc.identifier.issn | 2095-8226 | - |
dc.identifier.issn | 2199-4501 | - |
dc.identifier.uri | https://link.springer.com/article/10.1007%2Fs40843-017-9029-5 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/116277 | - |
dc.description.abstract | Controlling the surface structure and composition at the atomic level is an effective way to tune the catalytic properties of bimetallic catalysts. Herein, we demonstrate a generalized strategy to synthesize highly monodisperse, surfactant-free octahedral PtxNi1-x nanoparticles with tunable surface structure and composition. With increasing the Ni content in the bulk composition, the degree of concaveness of the octahedral PtxNi1-x nanoparticles increases. We systematically studied the correlation between their surface structure/composition and their observed oxygen reduction activity. Electrochemical studies have shown that all the octahedral PtxNi1-x nanoparticles exhibit enhanced oxygen reduction activity relative to the state-of-the-art commercial Pt/C catalyst. More importantly, we find that the surface structure and composition of the octahedral PtxNi1-x nanoparticles have significant effect on their oxygen reduction activity. Among the studied PtxNi1-x nanoparticles, the octahedral Pt1Ni1 nanoparticles with slight concaveness in its (111) facet show the highest activity. At 0.90 V vs. RHE, the Pt mass and specific activity of the octahedral Pt1Ni1 nanoparticles are 7.0 and 7.5-fold higher than that of commercial Pt/C catalyst, respectively. The present work not only provides a generalized strategy to synthesize highly monodisperse, surfactant-free octahedral PtxNi1-x nanoparticles with tunable surface structure and composition, but also provides insights to the structure-activity correlation. | en_US |
dc.description.sponsorship | This research was supported by the National Research Foundation, Prime Minister's Office, Singapore under its CREATE Programme. We also acknowledge financial support by the Defence Acquisition Program Administration and Agency for Defence Development (UD120080GD), Republic of Korea. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | SCIENCE PRESS | en_US |
dc.subject | PtNi | en_US |
dc.subject | octahedral | en_US |
dc.subject | concave | en_US |
dc.subject | surface structure | en_US |
dc.subject | oxygen reduction reaction | en_US |
dc.title | Octahedral PtNi nanoparticles with controlled surface structure and composition for oxygen reduction reaction | en_US |
dc.type | Article | en_US |
dc.relation.no | 11 | - |
dc.relation.volume | 60 | - |
dc.identifier.doi | 10.1007/s40843-017-9029-5 | - |
dc.relation.page | 1109-1120 | - |
dc.relation.journal | SCIENCE CHINA-MATERIALS | - |
dc.contributor.googleauthor | Lu, Yizhong | - |
dc.contributor.googleauthor | Thia, Larissa | - |
dc.contributor.googleauthor | Fisher, Adrian | - |
dc.contributor.googleauthor | Jung, Chi-Young | - |
dc.contributor.googleauthor | Yi, Sung Chul | - |
dc.contributor.googleauthor | Wang, Xin | - |
dc.relation.code | 2017043849 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF CHEMICAL ENGINEERING | - |
dc.identifier.pid | scyi | - |
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