{"title":"He+束辐照提高NiS2纳米片析氢电催化性能","authors":"Rongfang Zhang , Baorui Xia , Bo Wang","doi":"10.1016/j.flatc.2023.100572","DOIUrl":null,"url":null,"abstract":"<div><p>Hydrogen evolution by water splitting is one of the most popular methods in the new generation energy exploration. During the hydrogen evolution reaction (HER), NiS<sub>2</sub>, which is an electrochemical catalyst, has been widely investigated. However, the electrochemical catalytic performance of NiS<sub>2</sub>-based catalysts is still dissatisfied due to their relatively poor intrinsic catalytic activities. Herein, we introduced vacancies into NiS<sub>2</sub> nanosheets and the activation of initial inert sulfur sites by He<sup>+</sup> ion irradiation (at a dose of 1 × 10<sup>15</sup>/cm<sup>2</sup>) to improve the HER electrocatalytic performance of NiS<sub>2</sub>. Additionally, density functional theory (DFT) calculations were adopted. Clearly, the intrinsic vacancies (both Ni and S vacancies) of NiS<sub>2</sub> can reduce the band gap of NiS<sub>2</sub> and improve its electron transfer efficiency in the HER process. This work provides a candidate strategy for NiS<sub>2</sub>-based electrocatalysts to optimize HER performance.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":null,"pages":null},"PeriodicalIF":5.9000,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"He+ beam irradiation boosting electrocatalytic performance of NiS2 nanosheets for hydrogen evolution reaction\",\"authors\":\"Rongfang Zhang , Baorui Xia , Bo Wang\",\"doi\":\"10.1016/j.flatc.2023.100572\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Hydrogen evolution by water splitting is one of the most popular methods in the new generation energy exploration. During the hydrogen evolution reaction (HER), NiS<sub>2</sub>, which is an electrochemical catalyst, has been widely investigated. However, the electrochemical catalytic performance of NiS<sub>2</sub>-based catalysts is still dissatisfied due to their relatively poor intrinsic catalytic activities. Herein, we introduced vacancies into NiS<sub>2</sub> nanosheets and the activation of initial inert sulfur sites by He<sup>+</sup> ion irradiation (at a dose of 1 × 10<sup>15</sup>/cm<sup>2</sup>) to improve the HER electrocatalytic performance of NiS<sub>2</sub>. Additionally, density functional theory (DFT) calculations were adopted. Clearly, the intrinsic vacancies (both Ni and S vacancies) of NiS<sub>2</sub> can reduce the band gap of NiS<sub>2</sub> and improve its electron transfer efficiency in the HER process. This work provides a candidate strategy for NiS<sub>2</sub>-based electrocatalysts to optimize HER performance.</p></div>\",\"PeriodicalId\":316,\"journal\":{\"name\":\"FlatChem\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.9000,\"publicationDate\":\"2023-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"FlatChem\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2452262723001046\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"FlatChem","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2452262723001046","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
He+ beam irradiation boosting electrocatalytic performance of NiS2 nanosheets for hydrogen evolution reaction
Hydrogen evolution by water splitting is one of the most popular methods in the new generation energy exploration. During the hydrogen evolution reaction (HER), NiS2, which is an electrochemical catalyst, has been widely investigated. However, the electrochemical catalytic performance of NiS2-based catalysts is still dissatisfied due to their relatively poor intrinsic catalytic activities. Herein, we introduced vacancies into NiS2 nanosheets and the activation of initial inert sulfur sites by He+ ion irradiation (at a dose of 1 × 1015/cm2) to improve the HER electrocatalytic performance of NiS2. Additionally, density functional theory (DFT) calculations were adopted. Clearly, the intrinsic vacancies (both Ni and S vacancies) of NiS2 can reduce the band gap of NiS2 and improve its electron transfer efficiency in the HER process. This work provides a candidate strategy for NiS2-based electrocatalysts to optimize HER performance.
期刊介绍:
FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)