Yuewen Wu, Mingpeng Chen, Huachuan Sun, Guohao Na, Dequan Li, Boxue Wang, Yun Chen, Tong Zhou, Guoyang Qiu, Jianhong Zhao, Yumin Zhang, Jin Zhang, Feng Liu, Hao Cui and Qingju Liu
{"title":"Manipulating anion intercalation into layered double hydroxide for alkaline seawater oxidation at high current density†","authors":"Yuewen Wu, Mingpeng Chen, Huachuan Sun, Guohao Na, Dequan Li, Boxue Wang, Yun Chen, Tong Zhou, Guoyang Qiu, Jianhong Zhao, Yumin Zhang, Jin Zhang, Feng Liu, Hao Cui and Qingju Liu","doi":"10.1039/D4CY00842A","DOIUrl":null,"url":null,"abstract":"<p >In this work, we propose a convenient strategy to manipulate anion intercalation into layered double hydroxide. The obtained NiFe LDH-Cl<small><sup>−</sup></small> electrode shows outstanding OER performance with both low overpotentials and high stability in alkaline seawater at high current density. Ultra-low overpotentials of 255 mV and 350 mV are required in 1 M KOH and alkaline seawater at a current density of 200 mA cm<small><sup>−2</sup></small>. In addition, NiFe LDH-Cl<small><sup>−</sup></small> can stably operate at 200 mA cm<small><sup>−2</sup></small> for 100 h. <em>In situ</em> Raman studies reveal that the active γ-NiOOH is generated on NiFe LDH-Cl<small><sup>−</sup></small> at a low potential by surface reconstruction, and Cl<small><sup>−</sup></small> intercalation helps optimize the peak area ratio of E<small><sub>g</sub></small> and A<small><sub>1g</sub></small>, which can be favorable for the alkaline seawater OER.</p>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4000,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Science & Technology","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/cy/d4cy00842a","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, we propose a convenient strategy to manipulate anion intercalation into layered double hydroxide. The obtained NiFe LDH-Cl− electrode shows outstanding OER performance with both low overpotentials and high stability in alkaline seawater at high current density. Ultra-low overpotentials of 255 mV and 350 mV are required in 1 M KOH and alkaline seawater at a current density of 200 mA cm−2. In addition, NiFe LDH-Cl− can stably operate at 200 mA cm−2 for 100 h. In situ Raman studies reveal that the active γ-NiOOH is generated on NiFe LDH-Cl− at a low potential by surface reconstruction, and Cl− intercalation helps optimize the peak area ratio of Eg and A1g, which can be favorable for the alkaline seawater OER.
期刊介绍:
A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis.
Editor-in-chief: Bert Weckhuysen
Impact factor: 5.0
Time to first decision (peer reviewed only): 31 days