欢迎访问《人工晶体学报》官方网站,今天是 2025年7月20日 星期日 分享到:

人工晶体学报 ›› 2025, Vol. 54 ›› Issue (6): 1034-1041.DOI: 10.16553/j.cnki.issn1000-985x.2025.0020

• 研究论文 • 上一篇    下一篇

通过缺陷和应变工程控制Janus MoSSe的析氢反应

刘劲松1(), 沈露2(), 任龙军2, 黄希忠3   

  1. 1.厦门信息学校汽车与建筑部,厦门 361009
    2.皖江工学院土木工程学院,马鞍山 243031
    3.吉大联合精密机械(厦门)有限公司技术中心,厦门 361009
  • 收稿日期:2025-01-25 出版日期:2025-06-20 发布日期:2025-06-23
  • 通信作者: 沈露,博士,教授。E-mail:wt14049@wjut.edu.cn
  • 作者简介:刘劲松(1971—),男,福建省人,高级讲师。E-mail:18959285367@189.cn
  • 基金资助:
    安徽省高校自然科学研究重点项目(2023AH052486);安徽省高校自然科学研究重点项目(2023AH052494);福建省职业教育研究项目(ZB2023037)

Controlling Hydrogen Evolution Reaction of Janus MoSSe by Defect and Strain Engineering

LIU Jingsong1(), SHEN Lu2(), REN Longjun2, HUANG Xizhong3   

  1. 1.Department of Automotive & Construction,Xiamen Information School,Xiameng 361009,China
    2.School of Civil Engineering,Wanjiang University of Technology,Ma’anshan 243031,China
    3.Technology Center,Jida United Precision Machinery (Xiamen) Co.,Ltd.,Xiamen 361009,China
  • Received:2025-01-25 Online:2025-06-20 Published:2025-06-23

摘要: Janus过渡金属二硫族化合物(TMDs)因独特的不对称结构而展现出优异的电子、光学和催化性能,在纳米催化和热电等领域具有广泛的应用前景。本研究采用第一性原理计算方法,系统研究了具有典型空位缺陷的Janus MoSSe单层的稳定性及其析氢反应(HER)性能。研究结果表明,单层Janus MoSSe在HER过程中的吉布斯自由能显著降低至约0.5 eV,明显低于原始MoSSe和传统MoS2单层。进一步研究表明,外部应变的引入可有效调控缺陷结构Janus MoSSe的HER性能,其性能提升主要归因于缺陷区域悬空键自适应释放集中应变,从而产生显著的可调谐模式。该研究阐明了应变工程提高MoSSe HER性能的潜在机制,为基于缺陷Janus TMDs的高效HER催化剂的优化设计提供了理论依据。

关键词: 过渡金属二硫族化合物; 第一性原理; 析氢反应; 吉布斯自由能; 应变工程; 缺陷结构

Abstract: Janus transition metal dichalcogenides (TMDs) exhibit exceptional electronic, optical, and catalytic properties due to their unique asymmetric structure, showing broad application prospects in fields such as nanocatalysis and thermoelectrics. This study employs first-principles calculations to systematically investigate the stability and hydrogen evolution reaction (HER) performance of monolayer Janus MoSSe with typical vacancy defects. The results demonstrate that the Gibbs free energy of monolayer Janus MoSSe during the HER process is significantly reduced to approximately 0.5 eV, markedly lower than that of pristine MoSSe and conventional MoS2 monolayers. Further research reveals that the introduction of external strain can effectively modulate the HER performance of defective Janus MoSSe. The performance enhancement is primarily attributed to the adaptive release of concentrated strain by dangling bonds in the defect regions, resulting in a notable tunable mode. This study elucidates the underlying mechanism of strain engineering in improving the HER performance of MoSSe, providing a theoretical foundation for the optimized design of efficient HER catalysts based on defective Janus TMDs.

Key words: transition metal dichalcogenide (TMD); first-principle; hydrogen evolution reaction (HER); Gibbs free energy; strain engineering; defective structure

中图分类号: