Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이상욱 | - |
dc.date.accessioned | 2021-11-30T02:22:06Z | - |
dc.date.available | 2021-11-30T02:22:06Z | - |
dc.date.issued | 2021-06 | - |
dc.identifier.citation | ADVANCED FUNCTIONAL MATERIALS, v. 31, no. 25, Article no. 2101727, 10pp | en_US |
dc.identifier.issn | 1616-301X | - |
dc.identifier.issn | 1616-3028 | - |
dc.identifier.uri | https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202101727 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/166589 | - |
dc.description.abstract | Fine control over the physicochemical structures of carbon electrocatalysts is important for improving the sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable Zn-air batteries. Covalent organic frameworks (COFs) are considered good candidate carbon materials because their structures can be precisely controlled. However, it remains a challenge to impart bifunctional electrocatalytic activities for both the ORR and OER to COFs. Herein, a pyridine-linked triazine covalent organic framework (PTCOF) with well-defined active sites and pores is readily prepared under mild conditions, and its electronic structure is modulated by incorporating Co nanoparticles (CoNP-PTCOF) to induce bifunctional electrocatalytic activities for the ORR and OER. The CoNP-PTCOF exhibits lower overpotentials for both ORR and OER with outstanding stability. Computational simulations find that the p-band center of CoNP-PTCOF down-shifted by charge transfer, compared to pristine PTCOF, facilitate the adsorption and desorption of oxygen intermediates on the pyridinic carbon active sites during the reactions. The Zn-air battery assembled with bifunctional CoNP-PTCOF exhibits a small voltage gap of 0.83 V and superior durability for 720 cycles as compared with a battery containing commercial Pt/C and RuO2. This strategy for modulating COF electrocatalytic activities can be extended for designing diverse carbon electrocatalysts. | en_US |
dc.description.sponsorship | This work was supported by the Basic Science Research Program (NRF-2017R1A2B2008455, NRF-2021R1A2C2003837, and 2021R1A2B5B01002879) through the National Research Foundation of Korea funded by the Ministry of Science and ICT, a grant from the Korea Health Technology R&D Project (HP20C0006) through the Korea Health Industry Development Institute, funded by the Ministry of Health & Welfare, Republic of Korea and by the Creative Materials Discovery Program of the Creative Multilevel Research Center (2018M3D1A1057844). | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | WILEY-V C H VERLAG GMBH | en_US |
dc.subject | bifunctional electrocatalysts | en_US |
dc.subject | covalent organic frameworks | en_US |
dc.subject | oxygen evolution reaction | en_US |
dc.subject | oxygen reduction reaction | en_US |
dc.subject | Zn– | en_US |
dc.subject | air batteries | en_US |
dc.title | Bifunctional Covalent Organic Framework-Derived Electrocatalysts with Modulated p-Band Centers for Rechargeable Zn-Air Batteries | en_US |
dc.type | Article | en_US |
dc.relation.no | 25 | - |
dc.relation.volume | 31 | - |
dc.identifier.doi | 10.1002/adfm.202101727 | - |
dc.relation.page | 1-10 | - |
dc.relation.journal | ADVANCED FUNCTIONAL MATERIALS | - |
dc.contributor.googleauthor | Park, Jung Hyun | - |
dc.contributor.googleauthor | Lee, Chi Ho | - |
dc.contributor.googleauthor | Ju, Jong-Min | - |
dc.contributor.googleauthor | Lee, Jun-Hyeong | - |
dc.contributor.googleauthor | Seol, Jaehun | - |
dc.contributor.googleauthor | Lee, Sang Uck | - |
dc.contributor.googleauthor | Kim, Jong-Ho | - |
dc.relation.code | 2021003210 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E] | - |
dc.sector.department | DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING | - |
dc.identifier.pid | sulee | - |
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