Role of Surface Steps in Activation of Surface Oxygen Sites on Ir Nanocrystals for Oxygen Evolution Reaction in Acidic Media
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Myeongjin | - |
dc.contributor.author | Park, Jinho | - |
dc.contributor.author | Wang, Maoyu | - |
dc.contributor.author | Wang, Qingxiao | - |
dc.contributor.author | Kim, Moon J. | - |
dc.contributor.author | Kim, Jin Young | - |
dc.contributor.author | Cho, Hyun-Seok | - |
dc.contributor.author | Kim, Chang-Hee | - |
dc.contributor.author | Feng, Zhenxing | - |
dc.contributor.author | Kim, Byung-Hyun | - |
dc.contributor.author | Lee, Seung Woo | - |
dc.date.accessioned | 2023-09-11T01:37:34Z | - |
dc.date.available | 2023-09-11T01:37:34Z | - |
dc.date.issued | 2022-03 | - |
dc.identifier.issn | 0926-3373 | - |
dc.identifier.issn | 1873-3883 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/115258 | - |
dc.description.abstract | Ir and its oxide are the only available oxygen evolution reaction (OER) electrocatalysts with reasonably high activity and stability for commercial proton-exchange membrane electrolyzers. However, the establishment of structure–performance relationships for the design of better Ir-based electrocatalysts is hindered by their uncontrolled surface reconstruction during OER in acidic media. Herein, we monitor the structural evolution of two model Ir nanocrystals (one with a flat surface enclosed by (100) facets and the other with a concave surface containing numerous high-index planes) under acidic OER conditions. Operando X-ray absorption spectroscopy measurements reveal that the promotion of surface IrOx formation during the OER by the concave Ir surface with high-index planes results in a gradual OER activity increase, while a decrease in activity and limited oxide formation are observed for the flat Ir surface. After the activation process, the Ir concave surface exhibits ~ 10 times higher activity than the flat surface. Density functional theory computations reveal that Ir high-index surfaces are thermodynamically preferred for the adsorption of oxygen atoms and the formation of surface oxides under OER conditions. Thus, our work establishes a structure–performance relationship for Ir nanocrystals under operating conditions, providing new principles for the design of nanoscale OER electrocatalysts. © 2021 Elsevier B.V. | - |
dc.format.extent | 10 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | Elsevier BV | - |
dc.title | Role of Surface Steps in Activation of Surface Oxygen Sites on Ir Nanocrystals for Oxygen Evolution Reaction in Acidic Media | - |
dc.type | Article | - |
dc.publisher.location | 네델란드 | - |
dc.identifier.doi | 10.1016/j.apcatb.2021.120834 | - |
dc.identifier.scopusid | 2-s2.0-85117781612 | - |
dc.identifier.wosid | 000712024700001 | - |
dc.identifier.bibliographicCitation | Applied Catalysis B: Environmental, v.302, pp 1 - 10 | - |
dc.citation.title | Applied Catalysis B: Environmental | - |
dc.citation.volume | 302 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 10 | - |
dc.type.docType | 정기학술지(Article(Perspective Article포함)) | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordPlus | INITIO MOLECULAR-DYNAMICS | - |
dc.subject.keywordPlus | TOTAL-ENERGY CALCULATIONS | - |
dc.subject.keywordPlus | DURABILITY | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | ELECTROCATALYSIS | - |
dc.subject.keywordPlus | DISSOLUTION | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | INSIGHTS | - |
dc.subject.keywordPlus | METALS | - |
dc.subject.keywordPlus | PH | - |
dc.subject.keywordAuthor | Density functional theory | - |
dc.subject.keywordAuthor | Electrocatalysts | - |
dc.subject.keywordAuthor | Ir nanocrystals | - |
dc.subject.keywordAuthor | Operando X-ray absorption spectroscopy | - |
dc.subject.keywordAuthor | Oxygen evolution reaction | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0926337321009590?pes=vor | - |
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