Dhanasekaran Vikraman , Sajjad Hussain , K. Karuppasamy , A. Kathalingam , Eun-Bee Jo , Anandhavelu Sanmugam , Jongwan Jung , Hyun-Seok Kim
{"title":"通过过渡金属掺杂设计活性位点调谐的二硫化钼纳米阵列结构,用于析氢和超级电容器应用","authors":"Dhanasekaran Vikraman , Sajjad Hussain , K. Karuppasamy , A. Kathalingam , Eun-Bee Jo , Anandhavelu Sanmugam , Jongwan Jung , Hyun-Seok Kim","doi":"10.1016/j.jallcom.2021.162271","DOIUrl":null,"url":null,"abstract":"<div><p>Extensive investigations have been made over the past two decades on the two-dimensional molybdenum sulfide (MoS<sub>2</sub><span>) since their dominating characteristics for the various applications including electrocatalysis and energy storage. Albeit MoS</span><sub>2</sub><span> possesses the plentiful active sulfur edges, but their deficient inactive facets lead the poor conductivity and low efficiency. In this work, we attempted to activate more active sites by the insertion of doping transition metals such as nickel (Ni), copper (Cu) and iron (Fe) into MoS</span><sub>2</sub> matrix. A facile chemical precipitation methodology was used to prepare the greatly active Fe, Cu and Ni metal doped MoS<sub>2</sub><span> nanoarrays for hydrogen evolution and supercapacitors. Microscopic studies revealed the tuned morphology composed of nanoarrays structured domains of grains for metals doped MoS</span><sub>2</sub> with the vertically aligned layers and extended layer spacing. The modified morphological properties, enriched surface area and plentiful active edges were apparently established for the metal doped MoS<sub>2</sub>. Hydrogen evolution results revealed that the improved electrocatalytic activity for Fe doped MoS<sub>2</sub> nanoarrays with the low overpotentials, small Tafel slopes and unremitting reactions over 24 h in the acid and alkaline solution. The highly porous structured Cu doped MoS<sub>2</sub><span> nanostructures owned the maximum capacitance of 353 F·g</span><sup>-1</sup> at 1 A·g<sup>-1</sup> current density with an admirable retaining capacity of ~94% after 5000 cycles.</p></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2022-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"43","resultStr":"{\"title\":\"Engineering the active sites tuned MoS2 nanoarray structures by transition metal doping for hydrogen evolution and supercapacitor applications\",\"authors\":\"Dhanasekaran Vikraman , Sajjad Hussain , K. Karuppasamy , A. Kathalingam , Eun-Bee Jo , Anandhavelu Sanmugam , Jongwan Jung , Hyun-Seok Kim\",\"doi\":\"10.1016/j.jallcom.2021.162271\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Extensive investigations have been made over the past two decades on the two-dimensional molybdenum sulfide (MoS<sub>2</sub><span>) since their dominating characteristics for the various applications including electrocatalysis and energy storage. Albeit MoS</span><sub>2</sub><span> possesses the plentiful active sulfur edges, but their deficient inactive facets lead the poor conductivity and low efficiency. In this work, we attempted to activate more active sites by the insertion of doping transition metals such as nickel (Ni), copper (Cu) and iron (Fe) into MoS</span><sub>2</sub> matrix. A facile chemical precipitation methodology was used to prepare the greatly active Fe, Cu and Ni metal doped MoS<sub>2</sub><span> nanoarrays for hydrogen evolution and supercapacitors. Microscopic studies revealed the tuned morphology composed of nanoarrays structured domains of grains for metals doped MoS</span><sub>2</sub> with the vertically aligned layers and extended layer spacing. The modified morphological properties, enriched surface area and plentiful active edges were apparently established for the metal doped MoS<sub>2</sub>. Hydrogen evolution results revealed that the improved electrocatalytic activity for Fe doped MoS<sub>2</sub> nanoarrays with the low overpotentials, small Tafel slopes and unremitting reactions over 24 h in the acid and alkaline solution. The highly porous structured Cu doped MoS<sub>2</sub><span> nanostructures owned the maximum capacitance of 353 F·g</span><sup>-1</sup> at 1 A·g<sup>-1</sup> current density with an admirable retaining capacity of ~94% after 5000 cycles.</p></div>\",\"PeriodicalId\":344,\"journal\":{\"name\":\"Journal of Alloys and Compounds\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2022-02-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"43\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Alloys and Compounds\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0925838821036811\",\"RegionNum\":2,\"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":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925838821036811","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Engineering the active sites tuned MoS2 nanoarray structures by transition metal doping for hydrogen evolution and supercapacitor applications
Extensive investigations have been made over the past two decades on the two-dimensional molybdenum sulfide (MoS2) since their dominating characteristics for the various applications including electrocatalysis and energy storage. Albeit MoS2 possesses the plentiful active sulfur edges, but their deficient inactive facets lead the poor conductivity and low efficiency. In this work, we attempted to activate more active sites by the insertion of doping transition metals such as nickel (Ni), copper (Cu) and iron (Fe) into MoS2 matrix. A facile chemical precipitation methodology was used to prepare the greatly active Fe, Cu and Ni metal doped MoS2 nanoarrays for hydrogen evolution and supercapacitors. Microscopic studies revealed the tuned morphology composed of nanoarrays structured domains of grains for metals doped MoS2 with the vertically aligned layers and extended layer spacing. The modified morphological properties, enriched surface area and plentiful active edges were apparently established for the metal doped MoS2. Hydrogen evolution results revealed that the improved electrocatalytic activity for Fe doped MoS2 nanoarrays with the low overpotentials, small Tafel slopes and unremitting reactions over 24 h in the acid and alkaline solution. The highly porous structured Cu doped MoS2 nanostructures owned the maximum capacitance of 353 F·g-1 at 1 A·g-1 current density with an admirable retaining capacity of ~94% after 5000 cycles.
期刊介绍:
The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.