Boosted Hydrogen Evolution via Molten Salt Synthesis of Vacancy-Rich MoS x Se2-x Electrocatalysts

被引:5
|
作者
Li, Boxin [1 ,2 ]
Wang, Ke [1 ,2 ]
He, Song [1 ,2 ]
Du, Hongfang [1 ,2 ,3 ,4 ,5 ]
Wang, Tingfeng [1 ,2 ]
Du, Zhuzhu [1 ,2 ]
Ai, Wei [1 ,2 ,5 ]
机构
[1] Northwestern Polytech Univ, Frontiers Sci Ctr Flexible Elect FSCFE, Xian 710072, Peoples R China
[2] Northwestern Polytech Univ, Shaanxi Inst Flexible Elect SIFE, Xian 710072, Peoples R China
[3] Fujian Normal Univ, Strait Inst Flexible Elect SIFE, Future Technol, Fuzhou 350117, Peoples R China
[4] Strait Lab Flexible Elect SLoFE, Fuzhou 350117, Peoples R China
[5] Northwestern Polytech Univ Shenzhen, Res & Dev Inst, Shenzhen 518057, Peoples R China
基金
中国国家自然科学基金;
关键词
MoS x Se2-x; molten salt; anion vacancy; KSCN; hydrogen evolution reaction; GENERALIZED GRADIENT APPROXIMATION; EFFICIENT; HETEROSTRUCTURES; GRAPHENE;
D O I
10.1021/acssuschemeng.3c07215
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
MoSxSe2-x emerges as a potent alternative to Pt-based electrodes in the electrochemical hydrogen evolution reaction (HER), although its practical application is hindered by suboptimal synthetic methods. Herein, a KSCN molten salt strategy is introduced, enabling the straightforward synthesis of MoSxSe2-x at a modest temperature of 320 degrees C through a one-step heating process involving Se powder and Na2MoO4 in a muffle furnace. It is elucidated that MoO42- facilitates the decomposition of KSCN to S2-, which subsequently activates Se powder, culminating in the formation of the SexS2- polyanion. This polyanion then interacts with MoO42-, yielding MoSxSe2-x characterized by a profusion of anion vacancies. This is attributed to the introduction of Se heteroatoms, causing lattice distortion and the substantial steric hindrance of SexS2-, limiting crystal growth. Theoretical analyses indicate that the presence of Se atoms and anion vacancies collaboratively modulates the electronic structure of MoSxSe2-x. This results in a minimized band gap of 0.88 eV and an almost zero Delta G(H*) of 0.09 eV in the optimized MoS1.5Se0.5. Consequently, MoS1.5Se0.5 exhibits remarkable HER performance, characterized by a low eta(10) of 103 mV and a minimal Tafel slope of 33 mV dec(-1), alongside robust stability. This research not only unveils a potent electrocatalyst for HER but also introduces a simplified synthesis strategy for transition metal selenosulfides, broadening their applicability across various domains.
引用
收藏
页码:4867 / 4875
页数:9
相关论文
共 50 条
  • [1] Synthesis of MoS2/CoSe2-x hybrids as electrocatalysts for hydrogen evolution reaction
    Huimin Wu
    Lan Shi
    Chuanqi Feng
    Yu Ding
    Ionics, 2022, 28 : 1337 - 1345
  • [2] Synthesis of MoS2/CoSe2-x hybrids as electrocatalysts for hydrogen evolution reaction
    Wu, Huimin
    Shi, Lan
    Feng, Chuanqi
    Ding, Yu
    IONICS, 2022, 28 (03) : 1337 - 1345
  • [3] Heterostructure engineering of MoS2/Mo2CTx nanoarray via molten salt synthesis for enhanced hydrogen evolution reaction
    Wu, Yanze
    Wang, Lin
    Chai, Zhifang
    Shi, Weiqun
    JOURNAL OF MATERIOMICS, 2023, 9 (06) : 1122 - 1128
  • [4] MoS2(1-x)Se2x Nanobelts for Enhanced Hydrogen Evolution
    Yang, Lei
    Wang, Wenhui
    Fu, Qi
    Zhang, Jingyu
    Xiang, Bin
    ELECTROCHIMICA ACTA, 2015, 185 : 236 - 241
  • [5] Ultrathin MoS2(1-x)Se2x Alloy Nanoflakes For Electrocatalytic Hydrogen Evolution Reaction
    Gong, Qiufang
    Cheng, Liang
    Liu, Changhai
    Zhang, Mei
    Feng, Qingliang
    Ye, Hualin
    Zeng, Min
    Xie, Liming
    Liu, Zhuang
    Li, Yanguang
    ACS CATALYSIS, 2015, 5 (04): : 2213 - 2219
  • [6] Synthesis of MoS2(1-x)Se2x and WS2(1-x)Se2x alloys for enhanced hydrogen evolution reaction performance
    Hussain, Sajjad
    Akbar, Kamran
    Vikraman, Dhanasekaran
    Karuppasamy, K.
    Kim, Hyun-Seok
    Chun, Seung-Hyun
    Jung, Jongwan
    INORGANIC CHEMISTRY FRONTIERS, 2017, 4 (12): : 2068 - 2074
  • [7] P,Se-Codoped MoS2 Nanosheets as Accelerated Electrocatalysts for Hydrogen Evolution
    Zhu, Ting
    Ding, Jiabao
    Shao, Qi
    Qian, Yong
    Huang, Xiaoqing
    CHEMCATCHEM, 2019, 11 (02) : 689 - 692
  • [8] High-Performance MCNTs@MoS2(1-x)Se2x Nanocomposites in Catalytic Hydrogen Evolution
    Jiang, Huixin
    Zhao, Wenjing
    Cui, Mengyu
    Zhang, Xinyi
    Song, Xinrong
    Wang, Chuangye
    ELECTROANALYSIS, 2025, 37 (01)
  • [9] Atomic-layered Pt clusters on S-vacancy rich MoS2-x with high electrocatalytic hydrogen evolution
    Shi, Feng
    Wu, Wenzhuo
    Chen, Jiafu
    Xu, Qun
    CHEMICAL COMMUNICATIONS, 2021, 57 (57) : 7011 - 7014
  • [10] MoS2@X2C (X = Mo or W) hybrids for enhanced supercapacitor and hydrogen evolution performances
    Hussain, Sajjad
    Rabani, Iqra
    Vikraman, Dhanasekaran
    Feroze, Asad
    Ali, Muhammad
    Seo, Young-Soo
    Song, Wooseok
    An, Ki-Seok
    Kim, Hyun-Seok
    Chun, Seung-Hyun
    Jung, Jongwan
    CHEMICAL ENGINEERING JOURNAL, 2021, 421