{"title":"Cobalt-regulated NiFe-LDH for efficient electrocatalytic oxygen evolution in alkaline simulated industrial sewage and natural seawater","authors":"Long Teng , Lifang Zhao","doi":"10.1016/j.jelechem.2023.117824","DOIUrl":null,"url":null,"abstract":"<div><p>The electrolysis of alkaline industrial sewage and seawater to produce hydrogen can alleviate the freshwater problem while also achieving clean energy production. Herein, we developed a three-dimensional spherical NiCoFe-LDH electrocatalyst for electrocatalytic oxygen evolution reaction (OER) by ions exchange and co-precipitate. The electronic interaction between the polymetallic ions optimizes the adsorption and desorption of the oxygen-containing intermediates. Compared to NiFe-LDH, the introduction of Co promoted the adsorption of OH* and the deprotonation of OOH* adsorbate intermediates. The prepared electrocatalyst shows good OER activity with a overpotential of 274 mV at 10 mA/cm<sup>2</sup>. Furthermore, the prepared electrocatalysts exhibit good resistance to chloride ion corrosion, and the industrial-grade geometric current density of 500 mA/cm<sup>2</sup> could be achieved at a potential of approximately 1.68 V (<em>vs</em>. RHE) in strongly alkaline (6 M KOH) industrial sewage and seawater.</p></div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":null,"pages":null},"PeriodicalIF":4.5000,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electroanalytical Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1572665723006847","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Chemical Engineering","Score":null,"Total":0}
引用次数: 0
Abstract
The electrolysis of alkaline industrial sewage and seawater to produce hydrogen can alleviate the freshwater problem while also achieving clean energy production. Herein, we developed a three-dimensional spherical NiCoFe-LDH electrocatalyst for electrocatalytic oxygen evolution reaction (OER) by ions exchange and co-precipitate. The electronic interaction between the polymetallic ions optimizes the adsorption and desorption of the oxygen-containing intermediates. Compared to NiFe-LDH, the introduction of Co promoted the adsorption of OH* and the deprotonation of OOH* adsorbate intermediates. The prepared electrocatalyst shows good OER activity with a overpotential of 274 mV at 10 mA/cm2. Furthermore, the prepared electrocatalysts exhibit good resistance to chloride ion corrosion, and the industrial-grade geometric current density of 500 mA/cm2 could be achieved at a potential of approximately 1.68 V (vs. RHE) in strongly alkaline (6 M KOH) industrial sewage and seawater.
期刊介绍:
The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied.
Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.