{"title":"CoSe2 nanowire array enabled highly efficient electrocatalytic reduction of nitrate for ammonia synthesis","authors":"","doi":"10.1016/j.cclet.2024.110005","DOIUrl":null,"url":null,"abstract":"<div><p>The electrocatalytic reduction of nitrate (NO<sub>3</sub><sup>–</sup>) not only facilitates the environmentally sustainable production of ammonia (NH<sub>3</sub>) but also purifies water by removing NO<sub>3</sub><sup>–</sup>, thereby transforming waste into valuable resources. The process of converting NO<sub>3</sub><sup>–</sup> to NH<sub>3</sub> is complex, involving eight electron transfers and multiple intermediates, making the choice of electrocatalyst critical. In this study, we report a cobalt selenide (CoSe<sub>2</sub>) nanowire array on carbon cloth (CoSe<sub>2</sub>/CC) as an effective electrocatalyst for the NO<sub>3</sub><sup>–</sup> to NH<sub>3</sub> conversion. In an alkaline medium with 0.1 mol/L NO<sub>3</sub><sup>–</sup>, CoSe<sub>2</sub>/CC demonstrates exceptional NH<sub>3</sub> Faradaic efficiency of 97.6 % and a high NH<sub>3</sub> yield of 517.7 µmol h<sup>–1</sup> cm<sup>–2</sup> at –0.6 V <em>versus</em> the reversible hydrogen electrode. Furthermore, insights into the reaction mechanism of CoSe<sub>2</sub> in the electrocatalytic NO<sub>3</sub><sup>–</sup> reduction are elucidated through density functional theory calculations.</p></div>","PeriodicalId":10088,"journal":{"name":"Chinese Chemical Letters","volume":null,"pages":null},"PeriodicalIF":9.4000,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chinese Chemical Letters","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1001841724005242","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The electrocatalytic reduction of nitrate (NO3–) not only facilitates the environmentally sustainable production of ammonia (NH3) but also purifies water by removing NO3–, thereby transforming waste into valuable resources. The process of converting NO3– to NH3 is complex, involving eight electron transfers and multiple intermediates, making the choice of electrocatalyst critical. In this study, we report a cobalt selenide (CoSe2) nanowire array on carbon cloth (CoSe2/CC) as an effective electrocatalyst for the NO3– to NH3 conversion. In an alkaline medium with 0.1 mol/L NO3–, CoSe2/CC demonstrates exceptional NH3 Faradaic efficiency of 97.6 % and a high NH3 yield of 517.7 µmol h–1 cm–2 at –0.6 V versus the reversible hydrogen electrode. Furthermore, insights into the reaction mechanism of CoSe2 in the electrocatalytic NO3– reduction are elucidated through density functional theory calculations.
期刊介绍:
Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.