Unveiling the Dual Potential of the MoS2@VS2 Nanocomposite as an Efficient Electrocatalyst for Hydrogen and Oxygen Evolution Reactions

IF 5.4 3区 材料科学 Q2 CHEMISTRY, PHYSICAL
Anju J S, Levna Chacko, Sruthi T, Gopika P, Vincent Mathew and P M Aneesh*, 
{"title":"Unveiling the Dual Potential of the MoS2@VS2 Nanocomposite as an Efficient Electrocatalyst for Hydrogen and Oxygen Evolution Reactions","authors":"Anju J S,&nbsp;Levna Chacko,&nbsp;Sruthi T,&nbsp;Gopika P,&nbsp;Vincent Mathew and P M Aneesh*,&nbsp;","doi":"10.1021/acsaem.4c0250410.1021/acsaem.4c02504","DOIUrl":null,"url":null,"abstract":"<p >Clean and reliable energy sources are essential amidst growing environmental concerns and impending energy shortages. Creating efficient and affordable catalysts for water splitting is a challenging yet viable option for renewable energy storage. Traditional platinum-based catalysts, while highly active, are quite expensive. Our study introduces two-dimensional (2D) MoS<sub>2</sub>@VS<sub>2</sub> nanocomposites, developed using hydrothermal technique, as a bifunctional catalyst for the electrolysis of water into valuable products. Structural studies revealed the formation of MoS<sub>2</sub>@VS<sub>2</sub> nanocomposites with a nanoflake-like structure, where MoS<sub>2</sub> nanosheets grow on the VS<sub>2</sub> surface. This 2D-based electrocatalyst demonstrated exceptional reaction kinetics, with low overpotentials of 265 mV for the hydrogen evolution reaction (HER) and 300 mV for the oxygen evolution reaction (OER) at 10 mA/cm<sup>2</sup>. Furthermore, the electrocatalyst displayed small Tafel slopes of 65 mV/dec and 103 mV/dec for HER and OER, respectively, along with excellent stability. The unprecedented catalytic activity stems from the synergistic effect between semiconducting MoS<sub>2</sub> and metallic VS<sub>2</sub>. Density functional theory calculations confirmed that this synergy enhances the electrical conductivity, facilitating efficient electron transfer during the reaction and providing an abundance of exposed active sites. These results mold MoS<sub>2</sub>@VS<sub>2</sub> nanocomposites as promising electrocatalysts for overall water splitting, paving the way for sustainable energy future.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 23","pages":"11184–11194 11184–11194"},"PeriodicalIF":5.4000,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsaem.4c02504","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}
引用次数: 0

Abstract

Clean and reliable energy sources are essential amidst growing environmental concerns and impending energy shortages. Creating efficient and affordable catalysts for water splitting is a challenging yet viable option for renewable energy storage. Traditional platinum-based catalysts, while highly active, are quite expensive. Our study introduces two-dimensional (2D) MoS2@VS2 nanocomposites, developed using hydrothermal technique, as a bifunctional catalyst for the electrolysis of water into valuable products. Structural studies revealed the formation of MoS2@VS2 nanocomposites with a nanoflake-like structure, where MoS2 nanosheets grow on the VS2 surface. This 2D-based electrocatalyst demonstrated exceptional reaction kinetics, with low overpotentials of 265 mV for the hydrogen evolution reaction (HER) and 300 mV for the oxygen evolution reaction (OER) at 10 mA/cm2. Furthermore, the electrocatalyst displayed small Tafel slopes of 65 mV/dec and 103 mV/dec for HER and OER, respectively, along with excellent stability. The unprecedented catalytic activity stems from the synergistic effect between semiconducting MoS2 and metallic VS2. Density functional theory calculations confirmed that this synergy enhances the electrical conductivity, facilitating efficient electron transfer during the reaction and providing an abundance of exposed active sites. These results mold MoS2@VS2 nanocomposites as promising electrocatalysts for overall water splitting, paving the way for sustainable energy future.

Abstract Image

揭示了MoS2@VS2纳米复合材料作为析氢和析氧反应的高效电催化剂的双重潜力
在日益增长的环境问题和迫在眉睫的能源短缺中,清洁和可靠的能源是必不可少的。对于可再生能源储存来说,创造高效且价格合理的水分解催化剂是一项具有挑战性但可行的选择。传统的铂基催化剂虽然活性很高,但价格相当昂贵。我们的研究介绍了利用水热技术开发的二维(2D) MoS2@VS2纳米复合材料,作为水电解成有价值产品的双功能催化剂。结构研究表明,形成了具有纳米片状结构的MoS2@VS2纳米复合材料,其中MoS2纳米片生长在VS2表面。这种2d电催化剂表现出优异的反应动力学,在10 mA/cm2下,析氢反应(HER)的过电位为265 mV,析氧反应(OER)的过电位为300 mV。此外,电催化剂对HER和OER表现出较小的Tafel斜率,分别为65 mV/dec和103 mV/dec,并具有良好的稳定性。这种前所未有的催化活性源于半导体MoS2和金属VS2之间的协同作用。密度泛函理论计算证实,这种协同作用增强了电导率,促进了反应过程中有效的电子转移,并提供了丰富的暴露活性位点。这些结果表明MoS2@VS2纳米复合材料是一种很有前途的电催化剂,可以全面分解水,为可持续能源的未来铺平道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
ACS Applied Energy Materials
ACS Applied Energy Materials Materials Science-Materials Chemistry
CiteScore
10.30
自引率
6.20%
发文量
1368
期刊介绍: ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信