Derun Li, Shixin Wu, Tao Jiang, Shuangshuang Huang, Zhaowu Wang, Hengyi Wu, Guangxu Cai and Feng Ren
{"title":"A highly efficient heterostructure nanorod bifunctional electrocatalyst for realizing enhanced overall water splitting at a large current density†","authors":"Derun Li, Shixin Wu, Tao Jiang, Shuangshuang Huang, Zhaowu Wang, Hengyi Wu, Guangxu Cai and Feng Ren","doi":"10.1039/D3TA03113F","DOIUrl":null,"url":null,"abstract":"<p >Exploring efficient, low cost and stable electrocatalysts working at large current densities is crucial for upgrading the current industrial electrochemical water splitting. Herein, a novel FeS<small><sub>2</sub></small>/Fe–Ni<small><sub>3</sub></small>S<small><sub>2</sub></small> heterostructure was successfully prepared <em>via</em> a simple one-step <em>in situ</em> hydrothermal vulcanization using F<small><sup>−</sup></small> regulation engineering. The FeS<small><sub>2</sub></small>/Fe–Ni<small><sub>3</sub></small>S<small><sub>2</sub></small> heterostructure array exhibits low overpotentials for both the OER (180 mV @ 10 mA cm<small><sup>−2</sup></small> and 300 mV @ 1 A cm<small><sup>−2</sup></small>) and the HER (105 mV @ 10 mA cm<small><sup>−2</sup></small> and 344 mV @ 1 A cm<small><sup>−2</sup></small>) with high stability operating at 1 A cm<small><sup>−2</sup></small> for 1000 h. In addition, the water-splitting system only needs 1.5 V to reach 10 mA cm<small><sup>−2</sup></small> and shows prolonged stability of more than 1200 h at 1 A cm<small><sup>−2</sup></small>. The DFT calculations show that the electrons redistribute at the interface and favor the chemisorption of hydrogen and oxygen-containing intermediates. This work highlights a novel, low cost and practical electrode for industrial electrochemical water splitting.</p>","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":" 34","pages":" 18158-18167"},"PeriodicalIF":9.5000,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2023/ta/d3ta03113f","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Exploring efficient, low cost and stable electrocatalysts working at large current densities is crucial for upgrading the current industrial electrochemical water splitting. Herein, a novel FeS2/Fe–Ni3S2 heterostructure was successfully prepared via a simple one-step in situ hydrothermal vulcanization using F− regulation engineering. The FeS2/Fe–Ni3S2 heterostructure array exhibits low overpotentials for both the OER (180 mV @ 10 mA cm−2 and 300 mV @ 1 A cm−2) and the HER (105 mV @ 10 mA cm−2 and 344 mV @ 1 A cm−2) with high stability operating at 1 A cm−2 for 1000 h. In addition, the water-splitting system only needs 1.5 V to reach 10 mA cm−2 and shows prolonged stability of more than 1200 h at 1 A cm−2. The DFT calculations show that the electrons redistribute at the interface and favor the chemisorption of hydrogen and oxygen-containing intermediates. This work highlights a novel, low cost and practical electrode for industrial electrochemical water splitting.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.