Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김병현 | - |
dc.date.accessioned | 2024-04-17T04:04:45Z | - |
dc.date.available | 2024-04-17T04:04:45Z | - |
dc.date.issued | 2023-03-29 | - |
dc.identifier.citation | ADVANCED SCIENCE | en_US |
dc.identifier.issn | 2198-3844 | en_US |
dc.identifier.uri | https://information.hanyang.ac.kr/#/eds/detail?an=edsdoj.61f10334546aa95e9cda1a7ebde&dbId=edsdoj | en_US |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/189829 | - |
dc.description.abstract | Abstract Oxygen evolution reaction (OER) under acidic conditions becomes of significant importance for the practical use of a proton exchange membrane (PEM) water electrolyzer. In particular, maximizing the mass activity of iridium (Ir) is one of the maiden issues. Herein, the authors discover that the Ir‐doped calcium copper titanate (CaCu₃Ti₄O₁₂, CCTO) perovskite exhibits ultrahigh mass activity up to 1000 A gIr−1 for the acidic OER, which is 66 times higher than that of the benchmark catalyst, IrO2. By substituting Ti with Ir in CCTO, metal‐oxygen (M‐O) covalency can be significantly increased leading to the reduced energy barrier for charge transfer. Further, highly polarizable CCTO perovskite referred to as “colossal dielectric”, possesses low defect formation energy for oxygen vacancy inducing a high number of oxygen vacancies in Ir‐doped CCTO (Ir‐CCTO). Electron transfer occurs from the oxygen vacancies and Ti to the substituted Ir consequentially resulting in the electron‐rich Ir and ‐deficient Ti sites. Thus, favorable adsorptions of oxygen intermediates can take place at Ti sites while the Ir ensures efficient charge supplies during OER, taking a top position of the volcano plot. Simultaneously, the introduced Ir dopants form nanoclusters at the surface of Ir‐CCTO, which can boost catalytic activity for the acidic OER. | en_US |
dc.description.sponsorship | N.T.T.T., K.K., and J.H.R. equally contributed to this work. This research wassupported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science,ICT and Future Planning (2021R1A2C2091497 and 2022R1A2C2010162).This research was also supported by “Regional Innovation Strategy (RIS)”through the National Research Foundation of Korea (NRF) funded by theMinistry of Education (MOE) (2022RIS-005).′′The work done at KIST wassupported by KIST Institutional Program (Project Nos. 2V09781). Also,this work was supported by the Hydrogen Energy Innovation Technol-ogy Development Program of the National Research Foundation of Ko-rea(NRF) funded by the Korean government (NRF-2019M3E6A1064020)and the National Institute of Supercomputing and Network/Korea In-stitute of Science and Technology Information with supercomputing re-sources including technical support (KSC-2021-CRE-0568) and the frame-work of Research and Development Program of the Korea Institute of En-ergy Research (KIER) (C3-2420). | en_US |
dc.language | en_US | en_US |
dc.publisher | WILEY | en_US |
dc.relation.ispartofseries | v. 10, Article No. 2207695;1-13 | - |
dc.subject | calcium copper titanate | en_US |
dc.subject | electrocatalysts | en_US |
dc.subject | low iridium | en_US |
dc.subject | oxygen evolution reaction | en_US |
dc.subject | Science | en_US |
dc.title | Colossal Dielectric Perovskites of Calcium Copper Titanate(CaCu3Ti4O12) with Low-Iridium Dopants Enables Ultrahigh Mass Activity for the Acidic Oxygen Evolution Reaction | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1002/advs.202207695 | en_US |
dc.relation.journal | ADVANCED SCIENCE | - |
dc.contributor.googleauthor | Thao, Nguyen Thi Thu | - |
dc.contributor.googleauthor | Kim, Kwangsoo | - |
dc.contributor.googleauthor | Ryu, Jeong Ho | - |
dc.contributor.googleauthor | An, Byeong‐Seon | - |
dc.contributor.googleauthor | Nayak, Arpan Kumar | - |
dc.contributor.googleauthor | Jang, Jin Uk | - |
dc.contributor.googleauthor | Na, Kyeong‐Han | - |
dc.contributor.googleauthor | Choi, Won‐Youl | - |
dc.contributor.googleauthor | Ali, Ghulam | - |
dc.contributor.googleauthor | Kim, Byung‐Hyun | - |
dc.relation.code | 2023036065 | - |
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 | bhkim00 | - |
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